Merge branch 'master' into deprecate-util-function

2025-12-06 02:30:46 -08:00 · 2025-11-29 20:20:14 +08:00 · 2025-11-29 20:20:14 +08:00 · d33e01921c
commit d33e01921c
parent 0e90f6c95c 4c27c09b4d
520 changed files with 7037 additions and 5295 deletions
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -10,7 +10,7 @@ jobs:
  test:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
      - uses: actions/setup-node@v4
        with:
          node-version: "${{ env.NODE_VERSION }}"
@ -30,7 +30,7 @@ jobs:
      TW5_BUILD_MAIN_EDITION: "./editions/prerelease"
      TW5_BUILD_OUTPUT: "./output/prerelease"
    steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
      - uses: actions/setup-node@v4
        with:
          node-version: "${{ env.NODE_VERSION }}"
@ -62,7 +62,7 @@ jobs:
      TW5_BUILD_OUTPUT: "./output"
      TW5_BUILD_ARCHIVE: "./output"
    steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
      - uses: actions/setup-node@v4
        with:
          node-version: "${{ env.NODE_VERSION }}"
--- a/.github/workflows/eslint.yml
+++ b/.github/workflows/eslint.yml
@ -0,0 +1,40 @@
+name: ESLint
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+  workflow_dispatch:
+
+concurrency:
+  group: lint-${{ github.event.pull_request.number || github.ref_name }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+  # Needed for GitHub Checks API
+  checks: write
+
+jobs:
+  eslint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Install dependencies
+        run: npm install --include=dev
+
+      - name: Run ESLint with reviewdog (GitHub Checks)
+        uses: reviewdog/action-eslint@v1
+        with:
+          eslint_flags: '.'
+          reporter: github-pr-check
+          fail_level: error
+          level: error
+          tool_name: ESLint PR code
--- a/.github/workflows/pr-check-build-size.yml
+++ b/.github/workflows/pr-check-build-size.yml
@ -20,7 +20,7 @@ jobs:
    steps:
    - name: build-size-check
      id: get_sizes
-      uses: TiddlyWiki/cerebrus@v4
+      uses: TiddlyWiki/cerebrus@v6
      with:
        pr_number: ${{ github.event.pull_request.number }}
        repo: ${{ github.repository }}
--- a/.github/workflows/pr-comment-build-size.yml
+++ b/.github/workflows/pr-comment-build-size.yml
@ -25,7 +25,7 @@ jobs:

    steps:
    - name: Build and check size
-      uses: TiddlyWiki/cerebrus@v4
+      uses: TiddlyWiki/cerebrus@v6
      with:
        pr_number: ${{ inputs.pr_number }}
        repo: ${{ github.repository }}
--- a/.github/workflows/pr-path-validation.yml
+++ b/.github/workflows/pr-path-validation.yml
@ -1,18 +0,0 @@
-name: Validate PR Paths
-
-on:
-  pull_request_target:
-    types: [opened, reopened, synchronize]
-
-jobs:
-  validate-pr:
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: Validate PR
-      uses: TiddlyWiki/cerebrus@v4
-      with:
-        pr_number: ${{ github.event.pull_request.number }}
-        repo: ${{ github.repository }}
-        base_ref: ${{ github.base_ref }}
-        github_token: ${{ secrets.GITHUB_TOKEN }}
--- a/.github/workflows/pr-validation.yml
+++ b/.github/workflows/pr-validation.yml
@ -0,0 +1,37 @@
+name: PR Validation
+
+on:
+  pull_request_target:
+    types: [opened, reopened, synchronize]
+
+permissions:
+  contents: read
+  pull-requests: write
+  issues: write
+jobs:
+  validate-pr:
+    runs-on: ubuntu-latest
+
+    steps:
+    # Step 1: Validate PR paths
+    - name: Validate PR Paths
+      uses: TiddlyWiki/cerebrus@v6
+      with:
+        pr_number: ${{ github.event.pull_request.number }}
+        repo: ${{ github.repository }}
+        base_ref: ${{ github.event.pull_request.base.ref }}
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        mode: rules
+      continue-on-error: true
+    
+    # Step 2: Validate change notes
+    - name: Validate Change Notes
+      uses: TiddlyWiki/cerebrus@v6
+      with:
+        pr_number: ${{ github.event.pull_request.number }}
+        repo: ${{ github.repository }}
+        base_ref: ${{ github.event.pull_request.base.ref }}
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        mode: changenotes
+      continue-on-error: false
+
--- a/bin/build-site.sh
+++ b/bin/build-site.sh
@ -73,10 +73,8 @@ rm $TW5_BUILD_OUTPUT/dev/static/*

 echo "<a href='./plugins/tiddlywiki/tw2parser/index.html'>Moved to http://tiddlywiki.com/plugins/tiddlywiki/tw2parser/index.html</a>" > $TW5_BUILD_OUTPUT/classicparserdemo.html
 echo "<a href='./plugins/tiddlywiki/codemirror/index.html'>Moved to http://tiddlywiki.com/plugins/tiddlywiki/codemirror/index.html</a>" > $TW5_BUILD_OUTPUT/codemirrordemo.html
-echo "<a href='./plugins/tiddlywiki/d3/index.html'>Moved to http://tiddlywiki.com/plugins/tiddlywiki/d3/index.html</a>" > $TW5_BUILD_OUTPUT/d3demo.html
 echo "<a href='./plugins/tiddlywiki/highlight/index.html'>Moved to http://tiddlywiki.com/plugins/tiddlywiki/highlight/index.html</a>" > $TW5_BUILD_OUTPUT/highlightdemo.html
 echo "<a href='./plugins/tiddlywiki/markdown/index.html'>Moved to http://tiddlywiki.com/plugins/tiddlywiki/markdown/index.html</a>" > $TW5_BUILD_OUTPUT/markdowndemo.html
-echo "<a href='./plugins/tiddlywiki/tahoelafs/index.html'>Moved to http://tiddlywiki.com/plugins/tiddlywiki/tahoelafs/index.html</a>" > $TW5_BUILD_OUTPUT/tahoelafs.html

 # Put the build details into a .tid file so that it can be included in each build (deleted at the end of this script)

@ -301,26 +299,6 @@ node $TW5_BUILD_TIDDLYWIKI \
 	--rendertiddler $:/core/save/empty plugins/tiddlywiki/katex/empty.html text/plain \
 	|| exit 1

-# /plugins/tiddlywiki/tahoelafs/index.html	Demo wiki with Tahoe-LAFS plugin
-# /plugins/tiddlywiki/tahoelafs/empty.html	Empty wiki with Tahoe-LAFS plugin
-node $TW5_BUILD_TIDDLYWIKI \
-	./editions/tahoelafs \
-	--load $TW5_BUILD_OUTPUT/build.tid \
-	--output $TW5_BUILD_OUTPUT \
-	--rendertiddler $:/core/save/all plugins/tiddlywiki/tahoelafs/index.html text/plain \
-	--rendertiddler $:/core/save/empty plugins/tiddlywiki/tahoelafs/empty.html text/plain \
-	|| exit 1
-
-# /plugins/tiddlywiki/d3/index.html	Demo wiki with D3 plugin
-# /plugins/tiddlywiki/d3/empty.html	Empty wiki with D3 plugin
-node $TW5_BUILD_TIDDLYWIKI \
-	./editions/d3demo \
-	--load $TW5_BUILD_OUTPUT/build.tid \
-	--output $TW5_BUILD_OUTPUT \
-	--rendertiddler $:/core/save/all plugins/tiddlywiki/d3/index.html text/plain \
-	--rendertiddler $:/core/save/empty plugins/tiddlywiki/d3/empty.html text/plain \
-	|| exit 1
-
 # /plugins/tiddlywiki/codemirror/index.html	Demo wiki with codemirror plugin
 # /plugins/tiddlywiki/codemirror/empty.html	Empty wiki with codemirror plugin
 node $TW5_BUILD_TIDDLYWIKI \
--- a/boot/boot.js
+++ b/boot/boot.js
@ -605,7 +605,7 @@ $tw.utils.evalGlobal = function(code,context,filename,sandbox,allowGlobals) {
 	// Call the function and return the exports
 	return fn.apply(null,contextValues);
 };
-$tw.utils.sandbox = !$tw.browser ? vm.createContext({}) : undefined; 
+$tw.utils.sandbox = !$tw.browser ? vm.createContext({}) : undefined;
 /*
 Run code in a sandbox with only the specified context variables in scope
 */
@ -763,12 +763,13 @@ the password, and to encrypt/decrypt a block of text
 $tw.utils.Crypto = function() {
 	var sjcl = $tw.node ? (global.sjcl || require("./sjcl.js")) : window.sjcl,
 		currentPassword = null,
-		callSjcl = function(method,inputText,password) {
+		callSjcl = function(method,inputText,password,options) {
+			options = options || {};
 			password = password || currentPassword;
 			var outputText;
 			try {
 				if(password) {
-					outputText = sjcl[method](password,inputText);
+					outputText = sjcl[method](password,inputText,options);
 				}
 			} catch(ex) {
 				console.log("Crypto error:" + ex);
@ -794,7 +795,8 @@ $tw.utils.Crypto = function() {
 		return !!currentPassword;
 	}
 	this.encrypt = function(text,password) {
-		return callSjcl("encrypt",text,password);
+		// set default ks:256 -- see: http://bitwiseshiftleft.github.io/sjcl/doc/convenience.js.html
+		return callSjcl("encrypt",text,password,{v:1,iter:10000,ks:256,ts:64,mode:"ccm",adata:"",cipher:"aes"});
 	};
 	this.decrypt = function(text,password) {
 		return callSjcl("decrypt",text,password);
@ -1494,7 +1496,8 @@ Define all modules stored in ordinary tiddlers
 */
 $tw.Wiki.prototype.defineTiddlerModules = function() {
 	this.each(function(tiddler,title) {
-		if(tiddler.hasField("module-type")) {
+		// Modules in draft tiddlers are disabled
+		if(tiddler.hasField("module-type") && (!tiddler.hasField("draft.of"))) {
 			switch(tiddler.fields.type) {
 				case "application/javascript":
 					// We only define modules that haven't already been defined, because in the browser modules in system tiddlers are defined in inline script
@ -1521,6 +1524,11 @@ $tw.Wiki.prototype.defineShadowModules = function() {
 	this.eachShadow(function(tiddler,title) {
 		// Don't define the module if it is overidden by an ordinary tiddler
 		if(!self.tiddlerExists(title) && tiddler.hasField("module-type")) {
+			if(tiddler.hasField("draft.of")) {
+				// Report a fundamental problem
+				console.warn(`TiddlyWiki: Plugins should not contain tiddlers with a 'draft.of' field: ${tiddler.fields.title}`);
+				return;
+			}
 			// Define the module
 			$tw.modules.define(tiddler.fields.title,tiddler.fields["module-type"],tiddler.fields.text);
 		}
@ -1869,7 +1877,7 @@ $tw.loadTiddlersFromFile = function(filepath,fields) {
 		fileSize = fs.statSync(filepath).size,
 		data;
 	if(fileSize > $tw.config.maxEditFileSize) {
-		data = "File " + filepath + "not loaded because it is too large";
+		data = "File " + filepath + " not loaded because it is too large";
 		console.log("Warning: " + data);
 		ext = ".txt";
 	} else {
@ -1940,22 +1948,41 @@ filepath: pathname of the directory containing the specification file
 $tw.loadTiddlersFromSpecification = function(filepath,excludeRegExp) {
 	var tiddlers = [];
 	// Read the specification
-	var filesInfo = $tw.utils.parseJSONSafe(fs.readFileSync(filepath + path.sep + "tiddlywiki.files","utf8"));
+	var filesInfo = $tw.utils.parseJSONSafe(fs.readFileSync(filepath + path.sep + "tiddlywiki.files","utf8"), function(e) {
+		console.log("Warning: tiddlywiki.files in " + filepath + " invalid: " + e.message);
+		return {};
+	});
+
 	// Helper to process a file
 	var processFile = function(filename,isTiddlerFile,fields,isEditableFile,rootPath) {
 		var extInfo = $tw.config.fileExtensionInfo[path.extname(filename)],
 			type = (extInfo || {}).type || fields.type || "text/plain",
 			typeInfo = $tw.config.contentTypeInfo[type] || {},
 			pathname = path.resolve(filepath,filename),
-			text = fs.readFileSync(pathname,typeInfo.encoding || "utf8"),
 			metadata = $tw.loadMetadataForFile(pathname) || {},
-			fileTiddlers;
+			fileTooLarge = false,
+			text, fileTiddlers;
+
+		if("_canonical_uri" in fields) {
+			text = "";
+		} else if(fs.statSync(pathname).size > $tw.config.maxEditFileSize) {
+			var msg = "File " + pathname + " not loaded because it is too large";
+			console.log("Warning: " + msg);
+			fileTooLarge = true;
+			text = isTiddlerFile ? msg : "";
+		} else {
+			text = fs.readFileSync(pathname,typeInfo.encoding || "utf8");
+		}
+
 		if(isTiddlerFile) {
-			fileTiddlers = $tw.wiki.deserializeTiddlers(path.extname(pathname),text,metadata) || [];
+			fileTiddlers = $tw.wiki.deserializeTiddlers(fileTooLarge ? ".txt" : path.extname(pathname),text,metadata) || [];
 		} else {
 			fileTiddlers =  [$tw.utils.extend({text: text},metadata)];
 		}
 		var combinedFields = $tw.utils.extend({},fields,metadata);
+		if(fileTooLarge && isTiddlerFile) {
+			delete combinedFields.type;    // type altered
+		}
 		$tw.utils.each(fileTiddlers,function(tiddler) {
 			$tw.utils.each(combinedFields,function(fieldInfo,name) {
 				if(typeof fieldInfo === "string" || $tw.utils.isArray(fieldInfo)) {
@ -2030,6 +2057,7 @@ $tw.loadTiddlersFromSpecification = function(filepath,excludeRegExp) {
 		} else if(tidInfo.suffix) {
 			tidInfo.fields.text = {suffix: tidInfo.suffix};
 		}
+		tidInfo.fields = tidInfo.fields || {};
 		processFile(tidInfo.file,tidInfo.isTiddlerFile,tidInfo.fields);
 	});
 	// Process any listed directories
@ -2051,6 +2079,7 @@ $tw.loadTiddlersFromSpecification = function(filepath,excludeRegExp) {
 					var thisPath = path.relative(filepath, files[t]),
 					filename = path.basename(thisPath);
 					if(filename !== "tiddlywiki.files" && !metaRegExp.test(filename) && fileRegExp.test(filename)) {
+						dirSpec.fields = dirSpec.fields || {};
 						processFile(thisPath,dirSpec.isTiddlerFile,dirSpec.fields,dirSpec.isEditableFile,dirSpec.path);
 					}
 				}
@ -2513,10 +2542,10 @@ $tw.boot.execStartup = function(options){
 	if($tw.safeMode) {
 		$tw.wiki.processSafeMode();
 	}
-	// Register typed modules from the tiddlers we've just loaded
-	$tw.wiki.defineTiddlerModules();
-	// And any modules within plugins
+	// Register typed modules from the tiddlers we've just loaded and any modules within plugins
+	// Tiddlers should appear last so that they may overwrite shadows during module registration
 	$tw.wiki.defineShadowModules();
+	$tw.wiki.defineTiddlerModules();
 	// Make sure the crypto state tiddler is up to date
 	if($tw.crypto) {
 		$tw.crypto.updateCryptoStateTiddler();
@ -2585,11 +2614,13 @@ $tw.boot.executeNextStartupTask = function(callback) {
 			$tw.boot.log(s.join(" "));
 			// Execute task
 			if(!$tw.utils.hop(task,"synchronous") || task.synchronous) {
-				task.startup();
-				if(task.name) {
-					$tw.boot.executedStartupModules[task.name] = true;
+				const thenable = task.startup();
+				if(thenable && typeof thenable.then === "function"){
+					thenable.then(asyncTaskCallback);
+					return true;
+				} else {
+					return asyncTaskCallback();
 				}
-				return $tw.boot.executeNextStartupTask(callback);
 			} else {
 				task.startup(asyncTaskCallback);
 				return true;
--- a/community/people/LinOnetwo.tid
+++ b/community/people/LinOnetwo.tid
@ -0,0 +1,19 @@
+avatar: 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
+created: 20251110102157310
+first-sighting: 2019-03-01
+fullname: Lin Onetwo
+github: linonetwo
+homepage: https://wiki.onetwo.website/
+modified: 20251111184556193
+tags: Community/Person Community/Team/Contributors
+talk.tiddlywiki.org: linonetwo
+title: @linonetwo
+type: text/vnd.tiddlywiki
+
+Since 2014, when I started college, I've been on a quest for a lifelong PKM tool. I cherish my life and all my experiences, and I don’t want to forget any of them. When I’m deeply focused on a task, it’s easy to lose sight of other important parts of my life—so I needed a system to help me stay balanced.
+
+Early on, I tried TiddlyWiki several times, but I was initially put off by its save mechanism and markup editing. That changed when I discovered an auto-backup script, which gave me the confidence to fully commit. Over time, I improved the script and eventually transitioned to using TidGi-Desktop and TidGi-Mobile.
+
+Today, my TiddlyWiki holds all my game design ideas and progress logs—it has truly become my second brain. With the help of LLM-powered programming tools, I’ve enhanced it with numerous plugins, allowing me to manage my mind in a more programmable and structured way. As a game developer, TiddlyWiki isn't the core of my professional work; But I've invested so much time because it's fundamentally about upgrading my mind.
+
+Most of my notes are open by default and shared publicly on my homepage as a digital garden.
--- a/community/people/PMario.tid
+++ b/community/people/PMario.tid
@ -0,0 +1,25 @@
+avatar: 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
+created: 20251110102157310
+first-sighting: 2009-11-14
+fullname: Mario Pietsch
+github: pmario
+homepage: https://wikilabs.github.io/
+modified: 20251110124935183
+tags: Community/Person Community/Team/Contributors
+talk.tiddlywiki.org: pmario
+title: @pmario
+type: text/vnd.tiddlywiki
+youtube: https://www.youtube.com/@pmario
+
+''Hi, My name is Mario Pietsch''. Back in 2009 I was ''searching'' for ''a simple presentation tool'' and discovered ~TiddlyWiki Classic, Monkey Pirate ~TiddlyWiki ([[MPTW|https://mptw.tiddlyspot.com/]]) with ~TagglyTagging, Eric Shulman's ~TiddlyTools, Saq Imtiaz's navigation macros, and more. --- ''I was captivated''.
+
+After a deep dive, I combined these elements into my own "Presentation Manager", along [[3 step by step tutorials|https://groups.google.com/g/tiddlywiki/c/qG_tZ1x0MEU/m/-vLA0luMicYJ]] to help others build it. 
+
+Thanks to ''the positive spirit'' of the ~TiddlyWiki community, I am proud to be part of it since 2009.
+
+When Jeremy started developing ~TiddlyWiki 5 on ~GitHub, I joined in—opening [[issue no. 1|https://github.com/TiddlyWiki/TiddlyWiki5/issues/1]] all the way up to 13. For what that’s good ;) Since then, I have submitted nearly 600 pull requests and more than 500 issues, many of which have been merged or resolved.
+
+My ~TiddlyWiki 5 "laboratory" is at https://wikilabs.github.io, and I also share content on my ''~YouTube'' channel: https://www.youtube.com/@pmario
+
+Have fun!<br>
+Mario
--- a/community/project/teams/Developer
+++ b/community/project/teams/Developer
@ -0,0 +1,19 @@
+title: Developer Experience Team
+tags: Community/Team
+modified: 20251109200632671
+created: 20251109200632671
+leader: @pmario
+team: @saqimtiaz
+
+The Developer Experience Team improves the experience of software contributors to the TiddlyWiki project. This includes enhancing documentation, streamlining contribution processes, and providing tools and resources to help developers effectively contribute to TiddlyWiki.
+
+Tools and resources managed by the Developer Experience Team include:
+
+* Advising and assisting contributors, particularly new developers
+* Maintenance of developer-focused documentation on the https://tiddlywiki.com/dev/ site, including:
+** Development environment setup guides
+** Code review processes and best practices
+** Contribution guidelines and documentation
+* Continuous integration and deployment scripts providing feedback on pull requests
+* Devising and implementing labelling systems for issues and pull requests
+* Automation scripts to simplify common development tasks
--- a/community/project/teams/Infrastructure
+++ b/community/project/teams/Infrastructure
@ -1,8 +1,8 @@
-title: Infrastructure Team
-tags: Community/Team
-modified: 20250909171928024
 created: 20250909171928024
+modified: 20251110133437795
+tags: Community/Team
 team: @MotovunJack
+title: Infrastructure Team

 The Infrastructure Team is responsible for maintaining and improving the infrastructure that supports the TiddlyWiki project. This includes the hosting, deployment, and management of the TiddlyWiki websites and services, as well as the tools and systems used by the TiddlyWiki community.

@ -12,3 +12,4 @@ The infrastructure includes:
 * github.com/TiddlyWiki
 * tiddlywiki.com DNS
 * Netlify account for PR previews
+* edit.tiddlywiki.com
--- a/community/project/teams/Quality
+++ b/community/project/teams/Quality
@ -0,0 +1,11 @@
+title: Quality Assurance Team
+created: 20251112125742296
+modified: 20251112125742296
+tags: Community/Team
+team: 
+leader: @Leilei332
+
+title: Quality Assurance Team
+
+The Quality Assurance Team is responsible for ensuring the quality and reliability of TiddlyWiki releases. This includes reviewing code submissions, testing new features, identifying bugs, and verifying that fixes are effective.
+
--- a/community/project/teams/tagCommunityTeam.tid
+++ b/community/project/teams/tagCommunityTeam.tid
@ -1,5 +1,5 @@
 title: Community/Team
 modified: 20250909171928024
 created: 20250909171928024
-list: [[Project Team]] [[Core Team]] [[Documentation Team]] [[MultiWikiServer Team]] [[Newsletter Team]] [[Infrastructure Team]] [[Succession Team]]
+list: [[Project Team]] [[Core Team]] [[Documentation Team]] [[Quality Assurance Team]] [[Infrastructure Team]] [[MultiWikiServer Team]] [[Newsletter Team]] [[Succession Team]]

--- a/core-server/commander.js
+++ b/core-server/commander.js
@ -99,16 +99,18 @@ Commander.prototype.executeNextCommand = function() {
 					}
 				}
 				if(command.info.synchronous) {
-					// Synchronous command
+					// Synchronous command (await thenables)
 					c = new command.Command(params,this);
 					err = c.execute();
-					if(err) {
+					if(err && typeof err.then === "function") {
+						err.then(e => { e ? this.callback(e) : this.executeNextCommand(); });
+					} else if(err) {
 						this.callback(err);
 					} else {
 						this.executeNextCommand();
 					}
 				} else {
-					// Asynchronous command
+					// Asynchronous command (await thenables)
 					c = new command.Command(params,this,function(err) {
 						if(err) {
 							self.callback(err);
@ -117,7 +119,9 @@ Commander.prototype.executeNextCommand = function() {
 						}
 					});
 					err = c.execute();
-					if(err) {
+					if(err && typeof err.then === "function") {
+						err.then(e => { if(e) this.callback(e); });
+					} else if(err) {
 						this.callback(err);
 					}
 				}
--- a/core-server/server/routes/delete-tiddler.js
+++ b/core-server/server/routes/delete-tiddler.js
@ -8,10 +8,14 @@ DELETE /recipes/default/tiddlers/:title
 \*/
 "use strict";

-exports.method = "DELETE";
+exports.methods = ["DELETE"];

 exports.path = /^\/bags\/default\/tiddlers\/(.+)$/;

+exports.info = {
+	priority: 100
+};
+
 exports.handler = function(request,response,state) {
 	var title = $tw.utils.decodeURIComponentSafe(state.params[0]);
 	state.wiki.deleteTiddler(title);
--- a/core-server/server/routes/get-favicon.js
+++ b/core-server/server/routes/get-favicon.js
@ -8,10 +8,14 @@ GET /favicon.ico
 \*/
 "use strict";

-exports.method = "GET";
+exports.methods = ["GET"];

 exports.path = /^\/favicon.ico$/;

+exports.info = {
+	priority: 100
+};
+
 exports.handler = function(request,response,state) {
 	var buffer = state.wiki.getTiddlerText("$:/favicon.ico","");
 	state.sendResponse(200,{"Content-Type": "image/x-icon"},buffer,"base64");
--- a/core-server/server/routes/get-file.js
+++ b/core-server/server/routes/get-file.js
@ -8,35 +8,66 @@ GET /files/:filepath
 \*/
 "use strict";

-exports.method = "GET";
+exports.methods = ["GET"];

 exports.path = /^\/files\/(.+)$/;

+exports.info = {
+	priority: 100
+};
+
 exports.handler = function(request,response,state) {
 	var path = require("path"),
 		fs = require("fs"),
-		util = require("util"),
 		suppliedFilename = $tw.utils.decodeURIComponentSafe(state.params[0]),
 		baseFilename = path.resolve(state.boot.wikiPath,"files"),
 		filename = path.resolve(baseFilename,suppliedFilename),
 		extension = path.extname(filename);
 	// Check that the filename is inside the wiki files folder
-	if(path.relative(baseFilename,filename).indexOf("..") !== 0) {
-		// Send the file
-		fs.readFile(filename,function(err,content) {
-			var status,content,type = "text/plain";
-			if(err) {
-				console.log("Error accessing file " + filename + ": " + err.toString());
-				status = 404;
-				content = "File '" + suppliedFilename + "' not found";
-			} else {
-				status = 200;
-				content = content;
-				type = ($tw.config.fileExtensionInfo[extension] ? $tw.config.fileExtensionInfo[extension].type : "application/octet-stream");
-			}
-			state.sendResponse(status,{"Content-Type": type},content);
-		});
-	} else {
-		state.sendResponse(404,{"Content-Type": "text/plain"},"File '" + suppliedFilename + "' not found");
+	if(path.relative(baseFilename,filename).indexOf("..") === 0) {
+		return state.sendResponse(404,{"Content-Type": "text/plain"},"File '" + suppliedFilename + "' not found");
 	}
+	fs.stat(filename, function(err, stats) {
+		if(err) {
+			return state.sendResponse(404,{"Content-Type": "text/plain"},"File '" + suppliedFilename + "' not found");
+		} else {
+			var type = ($tw.config.fileExtensionInfo[extension] ? $tw.config.fileExtensionInfo[extension].type : "application/octet-stream"),
+				responseHeaders = {
+					"Content-Type": type,
+					"Accept-Ranges": "bytes"
+				};
+			var rangeHeader = request.headers.range,
+				stream;
+			if(rangeHeader) {
+				// Handle range requests
+				var parts = rangeHeader.replace(/bytes=/, "").split("-"),
+					start = parseInt(parts[0], 10),
+					end = parts[1] ? parseInt(parts[1], 10) : stats.size - 1;
+				// Validate start and end
+				if(isNaN(start) || isNaN(end) || start < 0 || end < start || end >= stats.size) {
+					responseHeaders["Content-Range"] = "bytes */" + stats.size;
+					return response.writeHead(416, responseHeaders).end();
+				}
+				var chunksize = (end - start) + 1;
+				responseHeaders["Content-Range"] = "bytes " + start + "-" + end + "/" + stats.size;
+				responseHeaders["Content-Length"] = chunksize;
+				response.writeHead(206, responseHeaders);
+				stream = fs.createReadStream(filename, {start: start, end: end});
+			} else {
+				responseHeaders["Content-Length"] = stats.size;
+				response.writeHead(200, responseHeaders);
+				stream = fs.createReadStream(filename);
+			}
+			// Common stream error handling
+			stream.on("error", function(err) {
+				if(!response.headersSent) {
+					response.writeHead(500, {"Content-Type": "text/plain"});
+					response.end("Read error");
+				} else {
+					response.destroy();
+				}
+			});
+			stream.pipe(response);
+		}
+	});
 };
--- a/core-server/server/routes/get-index.js
+++ b/core-server/server/routes/get-index.js
@ -8,10 +8,14 @@ GET /
 \*/
 "use strict";

-exports.method = "GET";
+exports.methods = ["GET"];

 exports.path = /^\/$/;

+exports.info = {
+	priority: 100
+};
+
 exports.handler = function(request,response,state) {
 	var text = state.wiki.renderTiddler(state.server.get("root-render-type"),state.server.get("root-tiddler")),
 		responseHeaders = {
--- a/core-server/server/routes/get-login-basic.js
+++ b/core-server/server/routes/get-login-basic.js
@ -8,10 +8,14 @@ GET /login-basic -- force a Basic Authentication challenge
 \*/
 "use strict";

-exports.method = "GET";
+exports.methods = ["GET"];

 exports.path = /^\/login-basic$/;

+exports.info = {
+	priority: 100
+};
+
 exports.handler = function(request,response,state) {
 	if(!state.authenticatedUsername) {
 		// Challenge if there's no username
--- a/core-server/server/routes/get-status.js
+++ b/core-server/server/routes/get-status.js
@ -8,10 +8,14 @@ GET /status
 \*/
 "use strict";

-exports.method = "GET";
+exports.methods = ["GET"];

 exports.path = /^\/status$/;

+exports.info = {
+	priority: 100
+};
+
 exports.handler = function(request,response,state) {
 	var text = JSON.stringify({
 		username: state.authenticatedUsername || state.server.get("anon-username") || "",
--- a/core-server/server/routes/get-tiddler-html.js
+++ b/core-server/server/routes/get-tiddler-html.js
@ -8,10 +8,14 @@ GET /:title
 \*/
 "use strict";

-exports.method = "GET";
+exports.methods = ["GET"];

 exports.path = /^\/([^\/]+)$/;

+exports.info = {
+	priority: 100
+};
+
 exports.handler = function(request,response,state) {
 	var title = $tw.utils.decodeURIComponentSafe(state.params[0]),
 		tiddler = state.wiki.getTiddler(title);
--- a/core-server/server/routes/get-tiddler.js
+++ b/core-server/server/routes/get-tiddler.js
@ -8,10 +8,14 @@ GET /recipes/default/tiddlers/:title
 \*/
 "use strict";

-exports.method = "GET";
+exports.methods = ["GET"];

 exports.path = /^\/recipes\/default\/tiddlers\/(.+)$/;

+exports.info = {
+	priority: 100
+};
+
 exports.handler = function(request,response,state) {
 	var title = $tw.utils.decodeURIComponentSafe(state.params[0]),
 		tiddler = state.wiki.getTiddler(title),
--- a/core-server/server/routes/get-tiddlers-json.js
+++ b/core-server/server/routes/get-tiddlers-json.js
@ -10,10 +10,14 @@ GET /recipes/default/tiddlers.json?filter=<filter>

 var DEFAULT_FILTER = "[all[tiddlers]!is[system]sort[title]]";

-exports.method = "GET";
+exports.methods = ["GET"];

 exports.path = /^\/recipes\/default\/tiddlers.json$/;

+exports.info = {
+	priority: 100
+};
+
 exports.handler = function(request,response,state) {
 	var filter = state.queryParameters.filter || DEFAULT_FILTER;
 	if(state.wiki.getTiddlerText("$:/config/Server/AllowAllExternalFilters") !== "yes") {
--- a/core-server/server/routes/put-tiddler.js
+++ b/core-server/server/routes/put-tiddler.js
@ -8,10 +8,14 @@ PUT /recipes/default/tiddlers/:title
 \*/
 "use strict";

-exports.method = "PUT";
+exports.methods = ["PUT"];

 exports.path = /^\/recipes\/default\/tiddlers\/(.+)$/;

+exports.info = {
+	priority: 100
+};
+
 exports.handler = function(request,response,state) {
 	var title = $tw.utils.decodeURIComponentSafe(state.params[0]),
 	fields = $tw.utils.parseJSONSafe(state.data);
--- a/core-server/server/server.js
+++ b/core-server/server/server.js
@ -74,6 +74,11 @@ function Server(options) {
 		// console.log("Loading server route " + title);
 		self.addRoute(routeDefinition);
 	});
+	this.routes.sort((a, b) => {
+		const priorityA = a.info?.priority ?? 100,
+			priorityB = b.info?.priority ?? 100;
+		return priorityB - priorityA;
+	});
 	// Initialise the http vs https
 	this.listenOptions = null;
 	this.protocol = "http";
@ -217,7 +222,7 @@ Server.prototype.findMatchingRoute = function(request,state) {
 		} else {
 			match = potentialRoute.path.exec(pathname);
 		}
-		if(match && request.method === potentialRoute.method) {
+		if(match && (potentialRoute.methods?.includes(request.method) || potentialRoute.method === request.method)) {
 			state.params = [];
 			for(var p=1; p<match.length; p++) {
 				state.params.push(match[p]);
--- a/core/language/en-GB/ControlPanel.multids
+++ b/core/language/en-GB/ControlPanel.multids
@ -147,7 +147,7 @@ Settings/AutoSave/Disabled/Description: Do not save changes automatically
 Settings/AutoSave/Enabled/Description: Save changes automatically
 Settings/AutoSave/Hint: Attempt to automatically save changes during editing when using a supporting saver
 Settings/CamelCase/Caption: Camel Case Wiki Links
-Settings/CamelCase/Hint: You can globally disable automatic linking of ~CamelCase phrases. Requires reload to take effect
+Settings/CamelCase/Hint: Requires reload to take effect
 Settings/CamelCase/Description: Enable automatic ~CamelCase linking
 Settings/Caption: Settings
 Settings/EditorToolbar/Caption: Editor Toolbar
--- a/core/modules/editor/engines/framed.js
+++ b/core/modules/editor/engines/framed.js
@ -34,7 +34,7 @@ function FramedEngine(options) {
 	var paletteTitle = this.widget.wiki.getTiddlerText("$:/palette");
 	var colorScheme = (this.widget.wiki.getTiddler(paletteTitle) || {fields: {}}).fields["color-scheme"] || "light";
 	this.iframeDoc.open();
-	this.iframeDoc.write("<meta name='color-scheme' content='" + colorScheme + "'>");
+	this.iframeDoc.write("<!DOCTYPE html><html><head><meta name='color-scheme' content='" + colorScheme + "'></head><body></body></html>");
 	this.iframeDoc.close();
 	// Style the iframe
 	this.iframeNode.className = this.dummyTextArea.className;
--- a/core/modules/editor/factory.js
+++ b/core/modules/editor/factory.js
@ -68,7 +68,7 @@ function editTextWidgetFactory(toolbarEngine,nonToolbarEngine) {
 		// Fix height
 		this.engine.fixHeight();
 		// Focus if required
-		if(this.editFocus === "true" || this.editFocus === "yes") {
+		if($tw.browser && (this.editFocus === "true" || this.editFocus === "yes") && !$tw.utils.hasClass(this.parentDomNode.ownerDocument.activeElement,"tc-keep-focus")) {
 			this.engine.focus();
 		}
 		// Add widget message listeners
--- a/core/modules/filterrunprefixes/let.js
+++ b/core/modules/filterrunprefixes/let.js
@ -0,0 +1,41 @@
+/*\
+title: $:/core/modules/filterrunprefixes/let.js
+type: application/javascript
+module-type: filterrunprefix
+
+Assign a value to a variable
+
+\*/
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+/*
+Export our filter prefix function
+*/
+exports.let = function(operationSubFunction,options) {
+	// Return the filter run prefix function
+	return function(results,source,widget) {
+		// Save the result list
+		var resultList = results.toArray();
+		// Clear the results
+		results.clear();
+		// Evaluate the subfunction to get the variable name
+		var subFunctionResults = operationSubFunction(source,widget);
+		if(subFunctionResults.length === 0) {
+			return;
+		}
+		var name = subFunctionResults[0];
+		if(typeof name !== "string" || name.length === 0) {
+			return;
+		}
+		// Assign the result of the subfunction to the variable
+		var variables = {};
+		variables[name] = resultList;
+		// Return the variables
+		return {
+			variables: variables
+		};
+	};
+};
--- a/core/modules/filters.js
+++ b/core/modules/filters.js
@ -35,7 +35,7 @@ function parseFilterOperation(operators,filterString,p) {
 			operator.prefix = filterString.charAt(p++);
 		}
 		// Get the operator name
-		nextBracketPos = filterString.substring(p).search(/[\[\{<\/]/);
+		nextBracketPos = filterString.substring(p).search(/[\[\{<\/\(]/);
 		if(nextBracketPos === -1) {
 			throw "Missing [ in filter expression";
 		}
@ -79,6 +79,10 @@ function parseFilterOperation(operators,filterString,p) {
 					operand.variable = true;
 					nextBracketPos = filterString.indexOf(">",p);
 					break;
+				case "(": // Round brackets
+					operand.multiValuedVariable = true;
+					nextBracketPos = filterString.indexOf(")",p);
+					break;
 				case "/": // regexp brackets
 					var rex = /^((?:[^\\\/]|\\.)*)\/(?:\(([mygi]+)\))?/g,
 						rexMatch = rex.exec(filterString.substring(p));
@ -112,7 +116,7 @@ function parseFilterOperation(operators,filterString,p) {
 		// Check for multiple operands
 		while(filterString.charAt(p) === ",") {
 			p++;
-			if(/^[\[\{<\/]/.test(filterString.substring(p))) {
+			if(/^[\[\{<\/\(]/.test(filterString.substring(p))) {
 				nextBracketPos = p;
 				p++;
 				parseOperand(filterString.charAt(nextBracketPos));
@ -141,7 +145,15 @@ exports.parseFilter = function(filterString) {
 		p = 0, // Current position in the filter string
 		match;
 	var whitespaceRegExp = /(\s+)/mg,
-		operandRegExp = /((?:\+|\-|~|=|\:(\w+)(?:\:([\w\:, ]*))?)?)(?:(\[)|(?:"([^"]*)")|(?:'([^']*)')|([^\s\[\]]+))/mg;
+		// Groups:
+		// 1 - entire filter run prefix
+		// 2 - filter run prefix itself
+		// 3 - filter run prefix suffixes
+		// 4 - opening square bracket following filter run prefix
+		// 5 - double quoted string following filter run prefix
+		// 6 - single quoted string following filter run prefix
+		// 7 - anything except for whitespace and square brackets
+		operandRegExp = /((?:\+|\-|~|(?:=>?)|\:(\w+)(?:\:([\w\:, ]*))?)?)(?:(\[)|(?:"([^"]*)")|(?:'([^']*)')|([^\s\[\]]+))/mg;
 	while(p < filterString.length) {
 		// Skip any whitespace
 		whitespaceRegExp.lastIndex = p;
@ -152,38 +164,45 @@ exports.parseFilter = function(filterString) {
 		// Match the start of the operation
 		if(p < filterString.length) {
 			operandRegExp.lastIndex = p;
-			match = operandRegExp.exec(filterString);
-			if(!match || match.index !== p) {
-				throw $tw.language.getString("Error/FilterSyntax");
-			}
 			var operation = {
 				prefix: "",
 				operators: []
 			};
-			if(match[1]) {
-				operation.prefix = match[1];
-				p = p + operation.prefix.length;
-				if(match[2]) {
-					operation.namedPrefix = match[2];
-				}
-				if(match[3]) {
-					operation.suffixes = [];
-					 $tw.utils.each(match[3].split(":"),function(subsuffix) {
-						operation.suffixes.push([]);
-						$tw.utils.each(subsuffix.split(","),function(entry) {
-							entry = $tw.utils.trim(entry);
-							if(entry) {
-								operation.suffixes[operation.suffixes.length -1].push(entry);
-							}
+			match = operandRegExp.exec(filterString);
+			if(match && match.index === p) {
+				// If there is a filter run prefix
+				if(match[1]) {
+					operation.prefix = match[1];
+					p = p + operation.prefix.length;
+					// Name for named prefixes
+					if(match[2]) {
+						operation.namedPrefix = match[2];
+					}
+					// Suffixes for filter run prefix
+					if(match[3]) {
+						operation.suffixes = [];
+						$tw.utils.each(match[3].split(":"),function(subsuffix) {
+							operation.suffixes.push([]);
+							$tw.utils.each(subsuffix.split(","),function(entry) {
+								entry = $tw.utils.trim(entry);
+								if(entry) {
+									operation.suffixes[operation.suffixes.length -1].push(entry);
+								}
+							});
 						});
-					 });
+					}
+				}
+				// Opening square bracket
+				if(match[4]) {
+					p = parseFilterOperation(operation.operators,filterString,p);
+				} else {
+					p = match.index + match[0].length;
 				}
-			}
-			if(match[4]) { // Opening square bracket
-				p = parseFilterOperation(operation.operators,filterString,p);
 			} else {
-				p = match.index + match[0].length;
+				// No filter run prefix
+				p = parseFilterOperation(operation.operators,filterString,p);
 			}
+			// Quoted strings and unquoted title
 			if(match[5] || match[6] || match[7]) { // Double quoted string, single quoted string or unquoted title
 				operation.operators.push(
 					{operator: "title", operands: [{text: match[5] || match[6] || match[7]}]}
@ -251,6 +270,8 @@ exports.compileFilter = function(filterString) {
 				results = [];
 			$tw.utils.each(operation.operators,function(operator) {
 				var operands = [],
+					multiValueOperands = [],
+					isMultiValueOperand = [],
 					operatorFunction;
 				if(!operator.operator) {
 					// Use the "title" operator if no operator is specified
@ -266,13 +287,29 @@ exports.compileFilter = function(filterString) {
 					if(operand.indirect) {
 						var currTiddlerTitle = widget && widget.getVariable("currentTiddler");
 						operand.value = self.getTextReference(operand.text,"",currTiddlerTitle);
+						operand.multiValue = [operand.value];
 					} else if(operand.variable) {
 						var varTree = $tw.utils.parseFilterVariable(operand.text);
 						operand.value = widgetClass.evaluateVariable(widget,varTree.name,{params: varTree.params, source: source})[0] || "";
+						operand.multiValue = [operand.value];
+					} else if(operand.multiValuedVariable) {
+						var varTree = $tw.utils.parseFilterVariable(operand.text);
+						var resultList = widgetClass.evaluateVariable(widget,varTree.name,{params: varTree.params, source: source});
+						if((resultList.length > 0 && resultList[0] !== undefined) || resultList.length === 0) {
+							operand.multiValue = widgetClass.evaluateVariable(widget,varTree.name,{params: varTree.params, source: source}) || [];
+							operand.value = operand.multiValue[0] || "";
+						} else {
+							operand.value = "";
+							operand.multiValue = [];
+						}
+						operand.isMultiValueOperand = true;	
 					} else {
 						operand.value = operand.text;
+						operand.multiValue = [operand.value];
 					}
 					operands.push(operand.value);
+					multiValueOperands.push(operand.multiValue);
+					isMultiValueOperand.push(!!operand.isMultiValueOperand);
 				});

 				// Invoke the appropriate filteroperator module
@ -280,6 +317,8 @@ exports.compileFilter = function(filterString) {
 							operator: operator.operator,
 							operand: operands.length > 0 ? operands[0] : undefined,
 							operands: operands,
+							multiValueOperands: multiValueOperands,
+							isMultiValueOperand: isMultiValueOperand,
 							prefix: operator.prefix,
 							suffix: operator.suffix,
 							suffixes: operator.suffixes,
@ -319,6 +358,8 @@ exports.compileFilter = function(filterString) {
 					return filterRunPrefixes["and"](operationSubFunction, options);
 				case "~": // This operation is unioned into the result only if the main result so far is empty
 					return filterRunPrefixes["else"](operationSubFunction, options);
+				case "=>": // This operation is applied to the main results so far, and the results are assigned to a variable
+					return filterRunPrefixes["let"](operationSubFunction, options);
 				default: 
 					if(operation.namedPrefix && filterRunPrefixes[operation.namedPrefix]) {
 						return filterRunPrefixes[operation.namedPrefix](operationSubFunction, options);
@ -345,7 +386,13 @@ exports.compileFilter = function(filterString) {
 		self.filterRecursionCount = (self.filterRecursionCount || 0) + 1;
 		if(self.filterRecursionCount < MAX_FILTER_DEPTH) {
 			$tw.utils.each(operationFunctions,function(operationFunction) {
-				operationFunction(results,source,widget);
+				var operationResult = operationFunction(results,source,widget);
+				if(operationResult) {
+					if(operationResult.variables) {
+						// If the filter run prefix has returned variables, create a new fake widget with those variables
+						widget = widget.makeFakeWidgetWithVariables(operationResult.variables);
+					}
+				}
 			});
 		} else {
 			results.push("/**-- Excessive filter recursion --**/");
--- a/core/modules/filters/format/json.js
+++ b/core/modules/filters/format/json.js
@ -16,12 +16,8 @@ exports.json = function(source,operand,options) {
 		spaces = /^\d+$/.test(operand) ? parseInt(operand,10) : operand;
 	}
 	source(function(tiddler,title) {
-		var data = $tw.utils.parseJSONSafe(title);
-		try {
-			data = JSON.parse(title);
-		} catch(e) {
-			data = undefined;
-		}
+		var data = $tw.utils.parseJSONSafe(title,function(){return undefined;});
+
 		if(data !== undefined) {
 			results.push(JSON.stringify(data,null,spaces));
 		}
--- a/core/modules/filters/function.js
+++ b/core/modules/filters/function.js
@ -16,8 +16,8 @@ exports.function = function(source,operator,options) {
 	var functionName = operator.operands[0],
 		params = [],
 		results;
-	$tw.utils.each(operator.operands.slice(1),function(param) {
-		params.push({value: param});
+	$tw.utils.each(operator.multiValueOperands.slice(1),function(paramList) {
+		params.push({value: paramList[0] || "",multiValue: paramList});
 	});
 	// console.log(`Calling ${functionName} with params ${JSON.stringify(params)}`);
 	var variableInfo = options.widget && options.widget.getVariableInfo && options.widget.getVariableInfo(functionName,{params: params, source: source});
--- a/core/modules/filters/json-ops.js
+++ b/core/modules/filters/json-ops.js
@ -113,6 +113,22 @@ exports["jsonset"] = function(source,operator,options) {
 	return results;
 };

+exports["jsondelete"] = function(source,operator,options) {
+	var indexes = operator.operands,
+		results = [];
+	source(function(tiddler,title) {
+		var data = $tw.utils.parseJSONSafe(title,title);
+		// If parsing failed (data equals original title and is a string), return unchanged
+		if(data === title && typeof data === "string") {
+			results.push(title);
+		} else if(data) {
+			data = deleteDataItem(data,indexes);
+			results.push(JSON.stringify(data));
+		}
+	});
+	return results;
+};
+
 /*
 Given a JSON data structure and an array of index strings, return an array of the string representation of the values at the end of the index chain, or "undefined" if any of the index strings are invalid
 */
@ -144,7 +160,7 @@ function convertDataItemValueToStrings(item) {
 		return ["null"]
 	} else if(typeof item === "object") {
 		var results = [],i,t;
-		if($tw.utils.isArray(item)) {
+		if(Array.isArray(item)) {
 			// Return all the items in arrays recursively
 			for(i=0; i<item.length; i++) {
 				t = convertDataItemValueToStrings(item[i])
@ -178,7 +194,7 @@ function convertDataItemKeysToStrings(item) {
 			return [];
 		}
 		var results = [];
-		if($tw.utils.isArray(item)) {
+		if(Array.isArray(item)) {
 			for(var i=0; i<item.length; i++) {
 				results.push(i.toString());
 			}
@ -201,7 +217,7 @@ function getDataItemType(data,indexes) {
 		return item;
 	} else if(item === null) {
 		return "null";
-	} else if($tw.utils.isArray(item)) {
+	} else if(Array.isArray(item)) {
 		return "array";
 	} else if(typeof item === "object") {
 		return "object";
@ -213,7 +229,7 @@ function getDataItemType(data,indexes) {
 function getItemAtIndex(item,index) {
 	if($tw.utils.hop(item,index)) {
 		return item[index];
-	} else if($tw.utils.isArray(item)) {
+	} else if(Array.isArray(item)) {
 		index = $tw.utils.parseInt(index);
 		if(index < 0) { index = index + item.length };
 		return item[index]; // Will be undefined if index was out-of-bounds
@ -223,15 +239,16 @@ function getItemAtIndex(item,index) {
 }

 /*
-Given a JSON data structure and an array of index strings, return the value at the end of the index chain, or "undefined" if any of the index strings are invalid
+Traverse the index chain and return the item at the specified depth.
+Returns the item at the end of the traversal, or undefined if traversal fails.
 */
-function getDataItem(data,indexes) {
+function traverseIndexChain(data,indexes,stopBeforeLast) {
 	if(indexes.length === 0 || (indexes.length === 1 && indexes[0] === "")) {
 		return data;
 	}
-	// Get the item
 	var item = data;
-	for(var i=0; i<indexes.length; i++) {
+	var stopIndex = stopBeforeLast ? indexes.length - 1 : indexes.length;
+	for(var i = 0; i < stopIndex; i++) {
 		if(item !== undefined) {
 			if(item !== null && ["number","string","boolean"].indexOf(typeof item) === -1) {
 				item = getItemAtIndex(item,indexes[i]);
@ -243,6 +260,13 @@ function getDataItem(data,indexes) {
 	return item;
 }

+/*
+Given a JSON data structure and an array of index strings, return the value at the end of the index chain, or "undefined" if any of the index strings are invalid
+*/
+function getDataItem(data,indexes) {
+	return traverseIndexChain(data,indexes,false);
+}
+
 /*
 Given a JSON data structure, an array of index strings and a value, return the data structure with the value added at the end of the index chain. If any of the index strings are invalid then the JSON data structure is returned unmodified. If the root item is targetted then a different data object will be returned
 */
@ -255,18 +279,15 @@ function setDataItem(data,indexes,value) {
 	if(indexes.length === 0 || (indexes.length === 1 && indexes[0] === "")) {
 		return value;
 	}
-	// Traverse the JSON data structure using the index chain
-	var current = data;
-	for(var i = 0; i < indexes.length - 1; i++) {
-		current = getItemAtIndex(current,indexes[i]);
-		if(current === undefined) {
-			// Return the original JSON data structure if any of the index strings are invalid
-			return data;
-		}
+	// Traverse the JSON data structure using the index chain up to the parent
+	var current = traverseIndexChain(data,indexes,true);
+	if(current === undefined) {
+		// Return the original JSON data structure if any of the index strings are invalid
+		return data;
 	}
 	// Add the value to the end of the index chain
 	var lastIndex = indexes[indexes.length - 1];
-	if($tw.utils.isArray(current)) {
+	if(Array.isArray(current)) {
 		lastIndex = $tw.utils.parseInt(lastIndex);
 		if(lastIndex < 0) { lastIndex = lastIndex + current.length };
 	}
@ -276,3 +297,32 @@ function setDataItem(data,indexes,value) {
 	}
 	return data;
 }
+
+/*
+Given a JSON data structure and an array of index strings, return the data structure with the item at the end of the index chain deleted. If any of the index strings are invalid then the JSON data structure is returned unmodified. If the root item is targetted then the JSON data structure is returned unmodified.
+*/
+function deleteDataItem(data,indexes) {
+	// Check for the root item - don't delete the root
+	if(indexes.length === 0 || (indexes.length === 1 && indexes[0] === "")) {
+		return data;
+	}
+	// Traverse the JSON data structure using the index chain up to the parent
+	var current = traverseIndexChain(data,indexes,true);
+	if(current === undefined || current === null) {
+		// Return the original JSON data structure if any of the index strings are invalid
+		return data;
+	}
+	// Delete the item at the end of the index chain
+	var lastIndex = indexes[indexes.length - 1];
+	if(Array.isArray(current) && current !== null) {
+		lastIndex = $tw.utils.parseInt(lastIndex);
+		if(lastIndex < 0) { lastIndex = lastIndex + current.length };
+		// Check if index is valid before splicing
+		if(lastIndex >= 0 && lastIndex < current.length) {
+			current.splice(lastIndex,1);
+		}
+	} else if(typeof current === "object" && current !== null) {
+		delete current[lastIndex];
+	}
+	return data;
+}
--- a/core/modules/filters/math.js
+++ b/core/modules/filters/math.js
@ -217,6 +217,10 @@ function makeNumericReducingOperator(fnCalc,initialValue,fnFinal) {
 		source(function(tiddler,title) {
 			result.push($tw.utils.parseNumber(title));
 		});
+		// We return an empty array if there are no input titles
+		if(result.length === 0) {
+			return [];
+		}
 		var value = result.reduce(function(accumulator,currentValue) {
 				return fnCalc(accumulator,currentValue);
 			},initialValue);
--- a/core/modules/filters/title.js
+++ b/core/modules/filters/title.js
@ -16,12 +16,13 @@ exports.title = function(source,operator,options) {
 	var results = [];
 	if(operator.prefix === "!") {
 		source(function(tiddler,title) {
-			if(tiddler && tiddler.fields.title !== operator.operand) {
+			var titleList = operator.multiValueOperands[0] || [];
+			if(tiddler && titleList.indexOf(tiddler.fields.title) === -1) {
 				results.push(title);
 			}
 		});
 	} else {
-		results.push(operator.operand);
+		Array.prototype.push.apply(results,operator.multiValueOperands[0]);
 	}
 	return results;
 };
--- a/core/modules/filters/unknown.js
+++ b/core/modules/filters/unknown.js
@ -20,8 +20,8 @@ exports["[unknown]"] = function(source,operator,options) {
 	// Check for a user defined filter operator
 	if(operator.operator.indexOf(".") !== -1) {
 		var params = [];
-		$tw.utils.each(operator.operands,function(param) {
-			params.push({value: param});
+		$tw.utils.each(operator.multiValueOperands,function(paramList) {
+			params.push({value: paramList[0] || "",multiValue: paramList});
 		});	
 		var variableInfo = options.widget && options.widget.getVariableInfo && options.widget.getVariableInfo(operator.operator,{params: params, source: source});
 		if(variableInfo && variableInfo.srcVariable) {
--- a/core/modules/info/dimensions.js
+++ b/core/modules/info/dimensions.js
@ -0,0 +1,86 @@
+/*\
+title: $:/core/modules/info/windowdimensions.js
+type: application/javascript
+module-type: info
+\*/
+
+exports.getInfoTiddlerFields = function(updateInfoTiddlersCallback) {
+	if(!$tw.browser) {
+		return [];
+	}
+
+	class WindowDimensionsTracker {
+		constructor(updateCallback) {
+			this.updateCallback = updateCallback;
+			this.resizeHandlers = new Map();
+			this.dimensionsInfo = [
+				["outer/width", win => win.outerWidth],
+				["outer/height", win => win.outerHeight],
+				["inner/width", win => win.innerWidth],
+				["inner/height", win => win.innerHeight],
+				["client/width", win => win.document.documentElement.clientWidth],
+				["client/height", win => win.document.documentElement.clientHeight]
+			];
+		}
+
+		buildTiddlers(win,windowId) {
+			const prefix = `$:/info/browser/window/${windowId}/`;
+			return this.dimensionsInfo.map(([suffix, getter]) => ({
+				title: prefix + suffix,
+				text: String(getter(win))
+			}));
+		}
+
+		clearTiddlers(windowId) {
+			const prefix = `$:/info/browser/window/${windowId}/`,
+				deletions = this.dimensionsInfo.map(([suffix]) => prefix + suffix);
+			this.updateCallback([], deletions);
+		}
+
+		getUpdateHandler(win,windowId) {
+			let scheduled = false;
+			return () => {
+				if(!scheduled) {
+					scheduled = true;
+					requestAnimationFrame(() => {
+						this.updateCallback(this.buildTiddlers(win,windowId), []);
+						scheduled = false;
+					});
+				}
+			};
+		}
+
+		trackWindow(win,windowId) {
+			const handler = this.getUpdateHandler(win, windowId);
+			handler(); // initial update
+			win.addEventListener("resize",handler,{passive:true});
+			this.resizeHandlers.set(windowId,{win, handler});
+		}
+
+		untrackWindow(windowId) {
+			const entry = this.resizeHandlers.get(windowId);
+			if(entry) {
+				entry.win.removeEventListener("resize", entry.handler);
+				this.resizeHandlers.delete(windowId);
+			}
+			this.clearTiddlers(windowId);
+		}
+	}
+
+	const tracker = new WindowDimensionsTracker(updateInfoTiddlersCallback);
+
+	// Track main window
+	tracker.trackWindow(window,"system/main");
+
+	// Hook into event bus for user windows
+	if($tw.eventBus) {
+		$tw.eventBus.on("window:opened", ({window: win, windowID}) => {
+			tracker.trackWindow(win, "user/" + windowID);
+		});
+		$tw.eventBus.on("window:closed", ({windowID}) => {
+			tracker.untrackWindow("user/" + windowID);
+		});
+	}
+
+	return [];
+};
--- a/core/modules/parsers/audioparser.js
+++ b/core/modules/parsers/audioparser.js
@ -7,23 +7,34 @@ The audio parser parses an audio tiddler into an embeddable HTML element

 \*/

+/*jslint node: true, browser: true */
+/*global $tw: false */
 "use strict";

 var AudioParser = function(type,text,options) {
 	var element = {
 			type: "element",
-			tag: "audio",
+			tag: "$audio", // Using $audio to enable widget interception
 			attributes: {
 				controls: {type: "string", value: "controls"},
 				style: {type: "string", value: "width: 100%; object-fit: contain"}
 			}
-		},
-		src;
+		};
+		
+	// Pass through source information
 	if(options._canonical_uri) {
 		element.attributes.src = {type: "string", value: options._canonical_uri};
+		element.attributes.type = {type: "string", value: type};
 	} else if(text) {
 		element.attributes.src = {type: "string", value: "data:" + type + ";base64," + text};
+		element.attributes.type = {type: "string", value: type};
 	}
+	
+	// Pass through tiddler title if available
+	if(options.title) {
+		element.attributes.tiddler = {type: "string", value: options.title};
+	}
+	
 	this.tree = [element];
 	this.source = text;
 	this.type = type;
@ -33,3 +44,4 @@ exports["audio/ogg"] = AudioParser;
 exports["audio/mpeg"] = AudioParser;
 exports["audio/mp3"] = AudioParser;
 exports["audio/mp4"] = AudioParser;
+	
--- a/core/modules/parsers/csvparser.js
+++ b/core/modules/parsers/csvparser.js
@ -11,10 +11,13 @@ The CSV text parser processes CSV files into a table wrapped in a scrollable wid

 var CsvParser = function(type,text,options) {
 	// Special handler for tab-delimited files
-	if (type === 'text/tab-delimited-values' && !options.separator) {
+	if(
+		!options.separator &&
+		(type === "text/tab-delimited-values" || type === "text/tab-separated-values")
+	) {
 		options.separator = "\t";
 	}
-	
+
 	// Table framework
 	this.tree = [{
 		"type": "scrollable", "children": [{
@ -32,7 +35,7 @@ var CsvParser = function(type,text,options) {
 	$tw.utils.each(lines, function(columns) {
 		maxColumns = Math.max(columns.length, maxColumns);
 	});
-	
+
 	for(var line=0; line<lines.length; line++) {
 		var columns = lines[line];
 		var row = {
@ -55,3 +58,4 @@ var CsvParser = function(type,text,options) {

 exports["text/csv"] = CsvParser;
 exports["text/tab-delimited-values"] = CsvParser;
+exports["text/tab-separated-values"] = CsvParser;
--- a/core/modules/parsers/parseutils.js
+++ b/core/modules/parsers/parseutils.js
@ -82,6 +82,7 @@ exports.parseTokenString = function(source,pos,token) {

 /*
 Look for a token matching a regex. Returns null if not found, otherwise returns {type: "regexp", match:, start:, end:,}
+Use the "Y" (sticky) flag to avoid searching the entire rest of the string
 */
 exports.parseTokenRegExp = function(source,pos,reToken) {
 	var node = {
@ -172,7 +173,7 @@ exports.parseMacroParameter = function(source,pos) {
 		start: pos
 	};
 	// Define our regexp
-	var reMacroParameter = /(?:([A-Za-z0-9\-_]+)\s*:)?(?:\s*(?:"""([\s\S]*?)"""|"([^"]*)"|'([^']*)'|\[\[([^\]]*)\]\]|((?:(?:>(?!>))|[^\s>"'])+)))/g;
+	const reMacroParameter = /(?:([A-Za-z0-9\-_]+)\s*:)?(?:\s*(?:"""([\s\S]*?)"""|"([^"]*)"|'([^']*)'|\[\[([^\]]*)\]\]|((?:(?:>(?!>))|[^\s>"'])+)))/y;
 	// Skip whitespace
 	pos = $tw.utils.skipWhiteSpace(source,pos);
 	// Look for the parameter
@ -240,7 +241,7 @@ exports.parseMacroInvocation = function(source,pos) {
 		params: []
 	};
 	// Define our regexps
-	var reMacroName = /([^\s>"'=]+)/g;
+	const reMacroName = /([^\s>"'=]+)/y;
 	// Skip whitespace
 	pos = $tw.utils.skipWhiteSpace(source,pos);
 	// Look for a double less than sign
@ -277,7 +278,7 @@ exports.parseFilterVariable = function(source) {
 			params: [],
 		},
 		pos = 0,
-		reName = /([^\s"']+)/g;
+		reName = /([^\s"']+)/y;
 	// If there is no whitespace or it is an empty string then there are no macro parameters
 	if(/^\S*$/.test(source)) {
 		node.name = source;
@ -302,11 +303,11 @@ exports.parseAttribute = function(source,pos) {
 		start: pos
 	};
 	// Define our regexps
-	var reAttributeName = /([^\/\s>"'`=]+)/g,
-		reUnquotedAttribute = /([^\/\s<>"'`=]+)/g,
-		reFilteredValue = /\{\{\{([\S\s]+?)\}\}\}/g,
-		reIndirectValue = /\{\{([^\}]+)\}\}/g,
-		reSubstitutedValue = /(?:```([\s\S]*?)```|`([^`]|[\S\s]*?)`)/g;
+	const reAttributeName = /([^\/\s>"'`=]+)/y,
+		reUnquotedAttribute = /([^\/\s<>"'`=]+)/y,
+		reFilteredValue = /\{\{\{([\S\s]+?)\}\}\}/y,
+		reIndirectValue = /\{\{([^\}]+)\}\}/y,
+		reSubstitutedValue = /(?:```([\s\S]*?)```|`([^`]|[\S\s]*?)`)/y;
 	// Skip whitespace
 	pos = $tw.utils.skipWhiteSpace(source,pos);
 	// Get the attribute name
--- a/core/modules/parsers/wikiparser/rules/commentblock.js
+++ b/core/modules/parsers/wikiparser/rules/commentblock.js
@ -22,7 +22,7 @@ Note that the syntax for comments is simplified to an opening "<!--" sequence an
 "use strict";

 exports.name = "commentblock";
-exports.types = {block:true, pragma:true};
+exports.types = {block: true, pragma: true};

 exports.init = function(parser) {
 	this.parser = parser;
@ -43,9 +43,18 @@ exports.findNextMatch = function(startPos) {
 	return undefined;
 };

+
 exports.parse = function() {
 	// Move past the match
 	this.parser.pos = this.endMatchRegExp.lastIndex;
-	// Don't return any elements
-	return [];
+	// Return a node representing the comment that is not rendered
+	var commentStart = this.match.index;
+	var commentEnd = this.endMatch.index + this.endMatch[0].length;
+	return [{
+			type: "void",
+			children: [],
+			text: this.parser.source.slice(commentStart, commentEnd),
+			start: commentStart,
+			end: commentEnd
+	}];
 };
--- a/core/modules/parsers/wikiparser/rules/commentinline.js
+++ b/core/modules/parsers/wikiparser/rules/commentinline.js
@ -40,6 +40,13 @@ exports.findNextMatch = function(startPos) {
 exports.parse = function() {
 	// Move past the match
 	this.parser.pos = this.endMatchRegExp.lastIndex;
-	// Don't return any elements
-	return [];
+	// Return a node representing the inline comment
+	var commentStart = this.match.index;
+	var commentEnd = this.endMatch.index + this.endMatch[0].length;
+	return [{
+			type: "void",
+			text: this.parser.source.slice(commentStart, commentEnd),
+			start: commentStart,
+			end: commentEnd
+	}];
 };
--- a/core/modules/parsers/wikiparser/rules/emphasis/strikethrough.js
+++ b/core/modules/parsers/wikiparser/rules/emphasis/strikethrough.js
@ -39,7 +39,7 @@ exports.parse = function() {
 	// Return the classed span
 	return [{
 		type: "element",
-		tag: "strike",
+		tag: "s",
 		children: tree
 	}];
 };
--- a/core/modules/parsers/wikiparser/rules/extlink.js
+++ b/core/modules/parsers/wikiparser/rules/extlink.js
@ -28,11 +28,11 @@ exports.init = function(parser) {

 exports.parse = function() {
 	// Move past the match
-    var start = this.parser.pos;
+	var start = this.parser.pos;
 	this.parser.pos = this.matchRegExp.lastIndex;
 	// Create the link unless it is suppressed
 	if(this.match[0].substr(0,1) === "~") {
-		return [{type: "text", text: this.match[0].substr(1)}];
+		return [{type: "text", text: this.match[0].substr(1), start: start, end: this.parser.pos}];
 	} else {
 		return [{
 			type: "element",
--- a/core/modules/parsers/wikiparser/rules/fnprocdef.js
+++ b/core/modules/parsers/wikiparser/rules/fnprocdef.js
@ -6,15 +6,15 @@ module-type: wikirule
 Wiki pragma rule for function, procedure and widget definitions

 ```
-\function name(param:defaultvalue,param2:defaultvalue)
+\function name(param:"defaultvalue", param2:"defaultvalue")
 definition text
 \end

-\procedure name(param:defaultvalue,param2:defaultvalue)
+\procedure name(param:"defaultvalue", param2:"defaultvalue")
 definition text
 \end

-\widget $mywidget(param:defaultvalue,param2:defaultvalue)
+\widget $mywidget(param:"defaultvalue", param2:"defaultvalue")
 definition text
 \end
 ```
--- a/core/modules/parsers/wikiparser/rules/hardlinebreaks.js
+++ b/core/modules/parsers/wikiparser/rules/hardlinebreaks.js
@ -50,6 +50,8 @@ exports.parse = function() {
 			}
 		}
 	} while(match && !match[1]);
-	// Return the nodes
+	// Mark first and last node, and return the nodes
+	if(tree[0]) tree[0].isRuleStart = true;
+	if(tree[tree.length-1]) tree[tree.length-1].isRuleEnd = true;
 	return tree;
 };
--- a/core/modules/parsers/wikiparser/rules/html.js
+++ b/core/modules/parsers/wikiparser/rules/html.js
@ -41,7 +41,7 @@ Parse the most recent match
 exports.parse = function() {
 	// Retrieve the most recent match so that recursive calls don't overwrite it
 	var tag = this.nextTag;
-	if (!tag.isSelfClosing) {
+	if(!tag.isSelfClosing) {
 		tag.openTagStart = tag.start;
 		tag.openTagEnd = tag.end;
 	}
@ -49,7 +49,7 @@ exports.parse = function() {
 	// Advance the parser position to past the tag
 	this.parser.pos = tag.end;
 	// Check for an immediately following double linebreak
-	var hasLineBreak = !tag.isSelfClosing && !!$tw.utils.parseTokenRegExp(this.parser.source,this.parser.pos,/([^\S\n\r]*\r?\n(?:[^\S\n\r]*\r?\n|$))/g);
+	var hasLineBreak = !tag.isSelfClosing && !!$tw.utils.parseTokenRegExp(this.parser.source,this.parser.pos,/([^\S\n\r]*\r?\n(?:[^\S\n\r]*\r?\n|$))/y);
 	// Set whether we're in block mode
 	tag.isBlock = this.is.block || hasLineBreak;
 	// Parse the body if we need to
@ -63,22 +63,22 @@ exports.parse = function() {
 		}
 		tag.end = this.parser.pos;
 		tag.closeTagEnd = tag.end;
-		if (tag.closeTagEnd === tag.openTagEnd || this.parser.source[tag.closeTagEnd - 1] !== '>') {
+		if(tag.closeTagEnd === tag.openTagEnd || this.parser.source[tag.closeTagEnd - 1] !== ">") {
 			tag.closeTagStart = tag.end;
 		} else {
 			tag.closeTagStart = tag.closeTagEnd - 2;
 			var closeTagMinPos = tag.children.length > 0 ? tag.children[tag.children.length-1].end : tag.openTagEnd;
-			if (!Number.isSafeInteger(closeTagMinPos)) closeTagMinPos = tag.openTagEnd;
-			while (tag.closeTagStart >= closeTagMinPos) {
+			if(!Number.isSafeInteger(closeTagMinPos)) closeTagMinPos = tag.openTagEnd;
+			while(tag.closeTagStart >= closeTagMinPos) {
 				var char = this.parser.source[tag.closeTagStart];
-				if (char === '>') {
+				if(char === ">") {
 					tag.closeTagStart = -1;
 					break;
 				}
-				if (char === '<') break;
+				if(char === "<") break;
 				tag.closeTagStart -= 1;
 			}
-			if (tag.closeTagStart < closeTagMinPos) {
+			if(tag.closeTagStart < closeTagMinPos) {
 				tag.closeTagStart = tag.end;
 			}
 		}
@ -100,7 +100,7 @@ exports.parseTag = function(source,pos,options) {
 			orderedAttributes: []
 		};
 	// Define our regexps
-	var reTagName = /([a-zA-Z0-9\-\$\.]+)/g;
+	const reTagName = /([a-zA-Z0-9\-\$\.]+)/y;
 	// Skip whitespace
 	pos = $tw.utils.skipWhiteSpace(source,pos);
 	// Look for a less than sign
@ -148,7 +148,7 @@ exports.parseTag = function(source,pos,options) {
 	pos = token.end;
 	// Check for a required line break
 	if(options.requireLineBreak) {
-		token = $tw.utils.parseTokenRegExp(source,pos,/([^\S\n\r]*\r?\n(?:[^\S\n\r]*\r?\n|$))/g);
+		token = $tw.utils.parseTokenRegExp(source,pos,/([^\S\n\r]*\r?\n(?:[^\S\n\r]*\r?\n|$))/y);
 		if(!token) {
 			return null;
 		}
--- a/core/modules/parsers/wikiparser/rules/image.js
+++ b/core/modules/parsers/wikiparser/rules/image.js
@ -113,7 +113,7 @@ exports.parseImage = function(source,pos) {
 	// Skip whitespace
 	pos = $tw.utils.skipWhiteSpace(source,pos);
 	// Get the source up to the terminating `]]`
-	token = $tw.utils.parseTokenRegExp(source,pos,/(?:([^|\]]*?)\|)?([^\]]+?)\]\]/g);
+	token = $tw.utils.parseTokenRegExp(source,pos,/(?:([^|\]]*?)\|)?([^\]]+?)\]\]/y);
 	if(!token) {
 		return null;
 	}
--- a/core/modules/parsers/wikiparser/rules/list.js
+++ b/core/modules/parsers/wikiparser/rules/list.js
@ -59,6 +59,7 @@ var listTypes = {
 	":": {listTag: "dl", itemTag: "dd"},
 	">": {listTag: "blockquote", itemTag: "div"}
 };
+exports.listTypes = listTypes;

 /*
 Parse the most recent match
--- a/core/modules/parsers/wikiparser/rules/macrocallblock.js
+++ b/core/modules/parsers/wikiparser/rules/macrocallblock.js
@ -29,7 +29,7 @@ exports.findNextMatch = function(startPos) {
 			var c = this.parser.source.charAt(nextCall.end);
 			// Ensure EOL after parsed macro
 			// If we didn't need to support IE, we'd just use /(?:\r?\n|$)/ym
-			if ((c === "") || (c === "\n") || ((c === "\r") && this.parser.source.charAt(nextCall.end+1) === "\n")) {
+			if((c === "") || (c === "\n") || ((c === "\r") && this.parser.source.charAt(nextCall.end+1) === "\n")) {
 				this.nextCall = nextCall;
 				return nextStart;
 			}
--- a/core/modules/parsers/wikiparser/rules/macrocallinline.js
+++ b/core/modules/parsers/wikiparser/rules/macrocallinline.js
@ -42,3 +42,5 @@ exports.parse = function() {
 	this.parser.pos = call.end;
 	return [call];
 };
+
+
--- a/core/modules/parsers/wikiparser/rules/macrodef.js
+++ b/core/modules/parsers/wikiparser/rules/macrodef.js
@ -52,9 +52,10 @@ exports.parse = function() {
 		}
 	}
 	// Is the remainder of the \define line blank after the parameter close paren?
-	var reEnd;
+	var reEnd,isBlock = true;
 	if(this.match[3]) {
 		// If so, it is a multiline definition and the end of the body is marked with \end
+		isBlock = false;
 		reEnd = new RegExp("((?:^|\\r?\\n)[^\\S\\n\\r]*\\\\end[^\\S\\n\\r]*(?:" + $tw.utils.escapeRegExp(this.match[1]) + ")?\\s*?(?:$|\\r?\\n))","mg");
 	} else {
 		// Otherwise, the end of the definition is marked by the end of the line
@ -79,7 +80,8 @@ exports.parse = function() {
 		attributes: {},
 		children: [],
 		params: params,
-		isMacroDefinition: true
+		isMacroDefinition: true,
+		isBlock: isBlock && !!endMatch
 	}];
 	$tw.utils.addAttributeToParseTreeNode(parseTreeNodes[0],"name",this.match[1]);
 	$tw.utils.addAttributeToParseTreeNode(parseTreeNodes[0],"value",text);
--- a/core/modules/parsers/wikiparser/rules/parsermode.js
+++ b/core/modules/parsers/wikiparser/rules/parsermode.js
@ -31,6 +31,7 @@ Parse the most recent match
 */
 exports.parse = function() {
 	// Move past the pragma invocation
+	var start = this.parser.pos;
 	this.parser.pos = this.matchRegExp.lastIndex;
 	// Parse whitespace delimited tokens terminated by a line break
 	var reMatch = /[^\S\n]*(\S+)|(\r?\n)/mg,
@ -58,6 +59,11 @@ exports.parse = function() {
 			this.parser.parseAsInline = true;
 		}
 	}
-	// No parse tree nodes to return
-	return [];
+	return [{
+		type: "void",
+		children: [],
+		parseAsInline: this.parser.parseAsInline,
+		start: start,
+		end: this.parser.pos
+	}];
 };
--- a/core/modules/parsers/wikiparser/rules/prettyextlink.js
+++ b/core/modules/parsers/wikiparser/rules/prettyextlink.js
@ -113,3 +113,5 @@ exports.parseLink = function(source,pos) {
 	node.end = closePos + 2;
 	return node;
 };
+
+
--- a/core/modules/parsers/wikiparser/rules/prettylink.js
+++ b/core/modules/parsers/wikiparser/rules/prettylink.js
@ -32,7 +32,7 @@ exports.parse = function() {
 	var text = this.match[1],
 		link = this.match[2] || text,
 		textEndPos = this.parser.source.indexOf("|", start);
-	if (textEndPos < 0 || textEndPos > this.matchRegExp.lastIndex) {
+	if(textEndPos < 0 || textEndPos > this.matchRegExp.lastIndex) {
 		textEndPos = this.matchRegExp.lastIndex - 2;
 	}
 	var linkStart = this.match[2] ? (start + this.match[1].length + 1) : start;
--- a/core/modules/parsers/wikiparser/rules/rules.js
+++ b/core/modules/parsers/wikiparser/rules/rules.js
@ -54,6 +54,13 @@ exports.parse = function() {
 	if(tokens.length > 0) {
 		this.parser.amendRules(tokens[0],tokens.slice(1));
 	}
-	// No parse tree nodes to return
-	return [];
+	// No widget to render, return void node.
+	return [{
+		type: "void",
+		attributes: {
+			action: {type: "string", value: tokens[0]},
+			rules: {type: "string", value: tokens.slice(1).join(" ")}
+		},
+		children: []
+	}];
 };
--- a/core/modules/parsers/wikiparser/rules/styleblock.js
+++ b/core/modules/parsers/wikiparser/rules/styleblock.js
@ -64,5 +64,8 @@ exports.parse = function() {
 			$tw.utils.addAttributeToParseTreeNode(tree[t],"style",styles.join(""));
 		}
 	}
-	return tree;
+	return [{
+		type: "void",
+		children: tree
+	}]
 };
--- a/core/modules/parsers/wikiparser/rules/styleinline.js
+++ b/core/modules/parsers/wikiparser/rules/styleinline.js
@ -21,7 +21,7 @@ exports.types = {inline: true};

 exports.init = function(parser) {
 	this.parser = parser;
-	// Regexp to match
+	// Regexp to match /@@(styles)?\s*(\.class\s+)?/
 	this.matchRegExp = /@@((?:[^\.\r\n\s:]+:[^\r\n;]+;)+)?(\.(?:[^\r\n\s]+)\s+)?/mg;
 };

--- a/core/modules/parsers/wikiparser/rules/transcludeblock.js
+++ b/core/modules/parsers/wikiparser/rules/transcludeblock.js
@ -23,6 +23,27 @@ exports.init = function(parser) {
 	this.matchRegExp = /\{\{([^\{\}\|]*)(?:\|\|([^\|\{\}]+))?(?:\|([^\{\}]+))?\}\}(?:\r?\n|$)/mg;
 };

+/*
+Reject the match if we don't have a template or text reference
+*/
+exports.findNextMatch = function(startPos) {
+	this.matchRegExp.lastIndex = startPos;
+	this.match = this.matchRegExp.exec(this.parser.source);
+	if(this.match) {
+		var template = $tw.utils.trim(this.match[2]),
+			textRef = $tw.utils.trim(this.match[1]);
+		// Bail if we don't have a template or text reference
+		if(!template && !textRef) {
+			return undefined;
+		} else {
+			return this.match.index;
+		}
+	} else {
+		return undefined;
+	}
+	return this.match ? this.match.index : undefined;
+};
+
 exports.parse = function() {
 	// Move past the match
 	this.parser.pos = this.matchRegExp.lastIndex;
--- a/core/modules/parsers/wikiparser/rules/transcludeinline.js
+++ b/core/modules/parsers/wikiparser/rules/transcludeinline.js
@ -23,6 +23,27 @@ exports.init = function(parser) {
 	this.matchRegExp = /\{\{([^\{\}\|]*)(?:\|\|([^\|\{\}]+))?(?:\|([^\{\}]+))?\}\}/mg;
 };

+/*
+Reject the match if we don't have a template or text reference
+*/
+exports.findNextMatch = function(startPos) {
+	this.matchRegExp.lastIndex = startPos;
+	this.match = this.matchRegExp.exec(this.parser.source);
+	if(this.match) {
+		var template = $tw.utils.trim(this.match[2]),
+			textRef = $tw.utils.trim(this.match[1]);
+		// Bail if we don't have a template or text reference
+		if(!template && !textRef) {
+			return undefined;
+		} else {
+			return this.match.index;
+		}
+	} else {
+		return undefined;
+	}
+	return this.match ? this.match.index : undefined;
+};
+
 exports.parse = function() {
 	// Move past the match
 	this.parser.pos = this.matchRegExp.lastIndex;
--- a/core/modules/parsers/wikiparser/rules/typedblock.js
+++ b/core/modules/parsers/wikiparser/rules/typedblock.js
@ -60,22 +60,37 @@ exports.parse = function() {
 	var parser = this.parser.wiki.parseText(parseType,text,{defaultType: "text/plain"});
 	// If there's no render type, just return the parse tree
 	if(!renderType) {
-		return parser.tree;
+		return  [{
+			type: "void",
+			children: $tw.utils.isArray(parser.tree) ? parser.tree : [parser.tree],
+			parseType: parseType,
+			renderType: renderType,
+			text: text,
+			start: start,
+			end: this.parser.pos
+		}];
 	} else {
 		// Otherwise, render to the rendertype and return in a <PRE> tag
 		var widgetNode = this.parser.wiki.makeWidget(parser),
 			container = $tw.fakeDocument.createElement("div");
 		widgetNode.render(container,null);
-		text = renderType === "text/html" ? container.innerHTML : container.textContent;
+		var renderResult = renderType === "text/html" ? container.innerHTML : container.textContent;
+		// Use void node to carry important info for typedblock
 		return [{
-			type: "element",
-			tag: "pre",
+			type: "void",
 			children: [{
-				type: "text",
-				text: text,
-				start: start,
-				end: this.parser.pos
-			}]
+				type: "element",
+				tag: "pre",
+				children: [{
+					type: "text",
+					text: renderResult,
+				}]
+			}],
+			parseType: parseType,
+			renderType: renderType,
+			text: text,
+			start: start,
+			end: this.parser.pos
 		}];
 	}
 };
--- a/core/modules/parsers/wikiparser/wikiparser.js
+++ b/core/modules/parsers/wikiparser/wikiparser.js
@ -215,8 +215,8 @@ WikiParser.prototype.parsePragmas = function() {
 		var subTree = nextMatch.rule.parse();
 		if(subTree.length > 0) {
 			// Set the start and end positions of the pragma rule if
-			if (subTree[0].start === undefined) subTree[0].start = start;
-			if (subTree[subTree.length - 1].end === undefined) subTree[subTree.length - 1].end = this.pos;
+			if(subTree[0].start === undefined) subTree[0].start = start;
+			if(subTree[subTree.length - 1].end === undefined) subTree[subTree.length - 1].end = this.pos;
 			$tw.utils.each(subTree, function (node) { node.rule = nextMatch.rule.name; });
 			// Quick hack; we only cope with a single parse tree node being returned, which is true at the moment
 			currentTreeBranch.push.apply(currentTreeBranch,subTree);
@ -245,9 +245,9 @@ WikiParser.prototype.parseBlock = function(terminatorRegExpString) {
 		var start = this.pos;
 		var subTree = nextMatch.rule.parse();
 		// Set the start and end positions of the first and last blocks if they're not already set
-		if (subTree.length > 0) {
-			if (subTree[0].start === undefined) subTree[0].start = start;
-			if (subTree[subTree.length - 1].end === undefined) subTree[subTree.length - 1].end = this.pos;
+		if(subTree.length > 0) {
+			if(subTree[0].start === undefined) subTree[0].start = start;
+			if(subTree[subTree.length - 1].end === undefined) subTree[subTree.length - 1].end = this.pos;
 		}
 		$tw.utils.each(subTree, function (node) { node.rule = nextMatch.rule.name; });
 		return subTree;
@ -256,7 +256,7 @@ WikiParser.prototype.parseBlock = function(terminatorRegExpString) {
 	var start = this.pos;
 	var children = this.parseInlineRun(terminatorRegExp);
 	var end = this.pos;
-	return [{type: "element", tag: "p", children: children, start: start, end: end }];
+	return [{type: "element", tag: "p", children: children, start: start, end: end, rule: "parseblock" }];
 };

 /*
@ -350,10 +350,10 @@ WikiParser.prototype.parseInlineRunUnterminated = function(options) {
 		var start = this.pos;
 		var subTree = nextMatch.rule.parse();
 		// Set the start and end positions of the first and last child if they're not already set
-		if (subTree.length > 0) {
+		if(subTree.length > 0) {
 			// Set the start and end positions of the first and last child if they're not already set
-			if (subTree[0].start === undefined) subTree[0].start = start;
-			if (subTree[subTree.length - 1].end === undefined) subTree[subTree.length - 1].end = this.pos;
+			if(subTree[0].start === undefined) subTree[0].start = start;
+			if(subTree[subTree.length - 1].end === undefined) subTree[subTree.length - 1].end = this.pos;
 		}
 		$tw.utils.each(subTree, function (node) { node.rule = nextMatch.rule.name; });
 		tree.push.apply(tree,subTree);
@ -410,9 +410,9 @@ WikiParser.prototype.parseInlineRunTerminatedExtended = function(terminatorRegEx
 			var start = this.pos;
 			var subTree = inlineRuleMatch.rule.parse();
 			// Set the start and end positions of the first and last child if they're not already set
-			if (subTree.length > 0) {
-				if (subTree[0].start === undefined) subTree[0].start = start;
-				if (subTree[subTree.length - 1].end === undefined) subTree[subTree.length - 1].end = this.pos;
+			if(subTree.length > 0) {
+				if(subTree[0].start === undefined) subTree[0].start = start;
+				if(subTree[subTree.length - 1].end === undefined) subTree[subTree.length - 1].end = this.pos;
 			}
 			$tw.utils.each(subTree, function (node) { node.rule = inlineRuleMatch.rule.name; });
 			tree.push.apply(tree,subTree);
--- a/core/modules/savers/download.js
+++ b/core/modules/savers/download.js
@ -35,7 +35,9 @@ DownloadSaver.prototype.save = function(text,method,callback,options) {
 	}
 	// Set up the link
 	var link = document.createElement("a");
-	if(Blob !== undefined) {
+	// We prefer Blobs if they're available, unless we're dealing with a tiddler type declaring itself full of base64 encoded content.
+	// Then we use data urls, because browsers will know to decode the stream and download the actual binary file as intended.
+	if(Blob !== undefined && !type.includes(";base64")) {
 		var blob = new Blob([text], {type: type});
 		link.setAttribute("href", URL.createObjectURL(blob));
 	} else {
--- a/core/modules/savers/postmessage.js
+++ b/core/modules/savers/postmessage.js
@ -0,0 +1,66 @@
+/*\
+title: $:/core/modules/savers/postmessage.js
+type: application/javascript
+module-type: saver
+
+Handles saving changes via window.postMessage() to the window.parent
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+/*
+Select the appropriate saver module and set it up
+*/
+var PostMessageSaver = function(wiki) {
+	this.publisher = new $tw.utils.BrowserMessagingPublisher({type: "SAVE"});
+};
+
+PostMessageSaver.prototype.save = function(text,method,callback,options) {
+	// Fail if the publisher hasn't been fully initialised
+	if(!this.publisher.canSend()) {
+		return false;
+	}
+	// Send the save request
+	this.publisher.send({
+		verb: "SAVE",
+		body: text
+	},function(err) {
+		if(err) {
+			callback("PostMessageSaver Error: " + err);
+		} else {
+			callback(null);
+		}
+	});
+	// Indicate that we handled the save
+	return true;
+};
+
+/*
+Information about this saver
+*/
+PostMessageSaver.prototype.info = {
+	name: "postmessage",
+	capabilities: ["save", "autosave"],
+	priority: 100
+};
+
+/*
+Static method that returns true if this saver is capable of working
+*/
+exports.canSave = function(wiki) {
+	// Provisionally say that we can save
+	return true;
+};
+
+/*
+Create an instance of this saver
+*/
+exports.create = function(wiki) {
+	return new PostMessageSaver(wiki);
+};
+
+})();
--- a/core/modules/startup/eventbus.js
+++ b/core/modules/startup/eventbus.js
@ -0,0 +1,46 @@
+/*\
+title: $:/core/modules/startup/eventbus.js
+type: application/javascript
+module-type: startup
+
+Event bus for cross module communication
+\*/
+
+exports.name = "eventbus";
+exports.platforms = ["browser"];
+exports.before = ["windows"];
+exports.synchronous = true;
+
+$tw.eventBus = {
+	listenersMap: new Map(),
+
+	on(event,handler) {
+		if(!this.listenersMap.has(event)) {
+			this.listenersMap.set(event,new Set());
+		}
+		const listeners = this.listenersMap.get(event);
+		listeners.add(handler);
+	},
+
+	off(event,handler) {
+		const listeners = this.listenersMap.get(event);
+		if(listeners) {
+			listeners.delete(handler);
+		}
+	},
+
+	once(event,handler) {
+		const wrapper = (...args) => {
+			handler(...args);
+			this.off(event, wrapper);
+		};
+		this.on(event, wrapper);
+	},
+
+	emit(event,data) {
+		const listeners = this.listenersMap.get(event);
+		if(listeners) {
+			listeners.forEach(fn => fn(data));
+		}
+	}
+};
--- a/core/modules/startup/favicon.js
+++ b/core/modules/startup/favicon.js
@ -19,6 +19,16 @@ exports.synchronous = true;
 var FAVICON_TITLE = "$:/favicon.ico";

 exports.startup = function() {
+	var setFavicon = function() {
+		var tiddler = $tw.wiki.getTiddler(FAVICON_TITLE);
+		if(tiddler) {
+			var faviconLink = document.getElementById("faviconLink"),
+				dataURI = $tw.utils.makeDataUri(tiddler.fields.text,tiddler.fields.type,tiddler.fields._canonical_uri);
+			faviconLink.setAttribute("href",dataURI);
+			$tw.faviconPublisher.send({verb: "FAVICON",body: dataURI});
+		}
+	}
+	$tw.faviconPublisher = new $tw.utils.BrowserMessagingPublisher({type: "FAVICON", onsubscribe: setFavicon});
 	// Set up the favicon
 	setFavicon();
 	// Reset the favicon when the tiddler changes
@ -28,11 +38,3 @@ exports.startup = function() {
 		}
 	});
 };
-
-function setFavicon() {
-	var tiddler = $tw.wiki.getTiddler(FAVICON_TITLE);
-	if(tiddler) {
-		var faviconLink = document.getElementById("faviconLink");
-		faviconLink.setAttribute("href",$tw.utils.makeDataUri(tiddler.fields.text,tiddler.fields.type,tiddler.fields._canonical_uri));
-	}
-}
--- a/core/modules/startup/info.js
+++ b/core/modules/startup/info.js
@ -19,11 +19,17 @@ var TITLE_INFO_PLUGIN = "$:/temp/info-plugin";

 exports.startup = function() {
 	// Function to bake the info plugin with new tiddlers
-	var updateInfoPlugin = function(tiddlerFieldsArray) {
+	// additions: array of tiddler field objects
+	// removals: array of titles to remove
+	var updateInfoPlugin = function(additions = [], removals = []) {
 		// Get the existing tiddlers
 		var json = $tw.wiki.getTiddlerData(TITLE_INFO_PLUGIN,{tiddlers: {}});
-		// Add the new ones
-		$tw.utils.each(tiddlerFieldsArray,function(fields) {
+		$tw.utils.each(removals,function(title) {
+			if(json.tiddlers[title]) {
+				delete json.tiddlers[title];
+			}
+		});
+		$tw.utils.each(additions,function(fields) {
 			if(fields && fields.title) {
 				json.tiddlers[fields.title] = fields;
 			}
@ -47,7 +53,7 @@ exports.startup = function() {
 		}
 	});
 	updateInfoPlugin(tiddlerFieldsArray);
-	var changes = $tw.wiki.readPluginInfo([TITLE_INFO_PLUGIN]);
+	$tw.wiki.readPluginInfo([TITLE_INFO_PLUGIN]);
 	$tw.wiki.registerPluginTiddlers("info",[TITLE_INFO_PLUGIN]);
 	$tw.wiki.unpackPluginTiddlers();
 };
--- a/core/modules/startup/render.js
+++ b/core/modules/startup/render.js
@ -33,10 +33,15 @@ exports.startup = function() {
 	});
 	$tw.titleContainer = $tw.fakeDocument.createElement("div");
 	$tw.titleWidgetNode.render($tw.titleContainer,null);
-	document.title = $tw.titleContainer.textContent;
+	var publishTitle = function() {
+		$tw.titlePublisher.send({verb: "PAGETITLE",body: document.title});
+		document.title = $tw.titleContainer.textContent;
+	};
+	$tw.titlePublisher = new $tw.utils.BrowserMessagingPublisher({type: "PAGETITLE", onsubscribe: publishTitle});
+	publishTitle();
 	$tw.wiki.addEventListener("change",function(changes) {
 		if($tw.titleWidgetNode.refresh(changes,$tw.titleContainer,null)) {
-			document.title = $tw.titleContainer.textContent;
+			publishTitle();
 		}
 	});
 	// Set up the styles
--- a/core/modules/startup/windows.js
+++ b/core/modules/startup/windows.js
@ -56,9 +56,11 @@ exports.startup = function() {
 		srcDocument.write("<!DOCTYPE html><head></head><body class='tc-body tc-single-tiddler-window'></body></html>");
 		srcDocument.close();
 		srcDocument.title = windowTitle;
+		$tw.eventBus.emit("window:opened",{windowID, window: srcWindow});
 		srcWindow.addEventListener("beforeunload",function(event) {
 			delete $tw.windows[windowID];
 			$tw.wiki.removeEventListener("change",refreshHandler);
+			$tw.eventBus.emit("window:closed",{windowID});
 		},false);
 		// Set up the styles
 		var styleWidgetNode = $tw.wiki.makeTranscludeWidget("$:/core/ui/PageStylesheet",{
--- a/core/modules/storyviews/classic.js
+++ b/core/modules/storyviews/classic.js
@ -47,16 +47,16 @@ ClassicStoryView.prototype.insert = function(widget) {
 		// Reset the margin once the transition is over
 		setTimeout(function() {
 			$tw.utils.setStyle(targetElement,[
-				{transition: "none"},
 				{marginBottom: ""}
 			]);
+			$tw.utils.removeStyle(targetElement, "transition");
 		},duration);
 		// Set up the initial position of the element
 		$tw.utils.setStyle(targetElement,[
-			{transition: "none"},
 			{marginBottom: (-currHeight) + "px"},
 			{opacity: "0.0"}
 		]);
+		$tw.utils.removeStyle(targetElement, "transition");
 		$tw.utils.forceLayout(targetElement);
 		// Transition to the final position
 		$tw.utils.setStyle(targetElement,[
@ -64,7 +64,7 @@ ClassicStoryView.prototype.insert = function(widget) {
 						"margin-bottom " + duration + "ms " + easing},
 			{marginBottom: currMarginBottom + "px"},
 			{opacity: "1.0"}
-	]);
+		]);
 	}
 };

@ -94,11 +94,9 @@ ClassicStoryView.prototype.remove = function(widget) {
 		setTimeout(removeElement,duration);
 		// Animate the closure
 		$tw.utils.setStyle(targetElement,[
-			{transition: "none"},
-			{transform: "translateX(0px)"},
 			{marginBottom:  currMarginBottom + "px"},
-			{opacity: "1.0"}
 		]);
+		$tw.utils.removeStyles(targetElement, ["transition", "transform", "opacity"]);
 		$tw.utils.forceLayout(targetElement);
 		$tw.utils.setStyle(targetElement,[
 			{transition: $tw.utils.roundTripPropertyName("transform") + " " + duration + "ms " + easing + ", " +
@ -113,4 +111,4 @@ ClassicStoryView.prototype.remove = function(widget) {
 	}
 };

-exports.classic = ClassicStoryView;
+exports.classic = ClassicStoryView;
--- a/core/modules/storyviews/pop.js
+++ b/core/modules/storyviews/pop.js
@ -37,10 +37,7 @@ PopStoryView.prototype.insert = function(widget) {
 	}
 	// Reset once the transition is over
 	setTimeout(function() {
-		$tw.utils.setStyle(targetElement,[
-			{transition: "none"},
-			{transform: "none"}
-		]);
+		$tw.utils.removeStyles(targetElement, ["transition", "transform"]);		
 		$tw.utils.setStyle(widget.document.body,[
 			{"overflow-x": ""}
 		]);
@ -51,10 +48,10 @@ PopStoryView.prototype.insert = function(widget) {
 	]);
 	// Set up the initial position of the element
 	$tw.utils.setStyle(targetElement,[
-		{transition: "none"},
 		{transform: "scale(2)"},
 		{opacity: "0.0"}
 	]);
+	$tw.utils.removeStyle(targetElement, "transition");		
 	$tw.utils.forceLayout(targetElement);
 	// Transition to the final position
 	$tw.utils.setStyle(targetElement,[
@ -63,6 +60,9 @@ PopStoryView.prototype.insert = function(widget) {
 		{transform: "scale(1)"},
 		{opacity: "1.0"}
 	]);
+	setTimeout(function() {
+		$tw.utils.removeStyles(targetElement, ["transition", "transform", "opactity"]);
+	}, duration)
 };

 PopStoryView.prototype.remove = function(widget) {
@ -81,11 +81,7 @@ PopStoryView.prototype.remove = function(widget) {
 	// Remove the element at the end of the transition
 	setTimeout(removeElement,duration);
 	// Animate the closure
-	$tw.utils.setStyle(targetElement,[
-		{transition: "none"},
-		{transform: "scale(1)"},
-		{opacity: "1.0"}
-	]);
+	$tw.utils.removeStyles(targetElement, ["transition", "transform", "opacity"]);		
 	$tw.utils.forceLayout(targetElement);
 	$tw.utils.setStyle(targetElement,[
 		{transition: $tw.utils.roundTripPropertyName("transform") + " " + duration + "ms ease-in-out, " +
@ -95,4 +91,4 @@ PopStoryView.prototype.remove = function(widget) {
 	]);
 };

-exports.pop = PopStoryView;
+exports.pop = PopStoryView;
--- a/core/modules/storyviews/zoomin.js
+++ b/core/modules/storyviews/zoomin.js
@ -96,6 +96,9 @@ ZoominListView.prototype.navigateTo = function(historyInfo) {
 		{transform: "translateX(0px) translateY(0px) scale(1)"},
 		{zIndex: "500"},
 	]);
+	setTimeout(function() {
+		$tw.utils.removeStyles(targetElement, ["transition", "opacity", "transform", "zIndex"]);
+	}, duration);
 	// Transform the previous tiddler out of the way and then hide it
 	if(prevCurrentTiddler && prevCurrentTiddler !== targetElement) {
 		scale = zoomBounds.width / sourceBounds.width;
@ -207,6 +210,9 @@ ZoominListView.prototype.remove = function(widget) {
 		{opacity: "0"},
 		{zIndex: "0"}
 	]);
+	setTimeout(function() {
+		$tw.utils.removeStyles(toWidgetDomNode, ["transformOrigin", "transform", "transition", "opacity", "zIndex"]);
+	}, duration);	
 	setTimeout(removeElement,duration);
 	// Now the tiddler we're going back to
 	if(toWidgetDomNode) {
@ -222,4 +228,4 @@ ZoominListView.prototype.logTextNodeRoot = function(node) {
 	this.textNodeLogger.log($tw.language.getString("Error/ZoominTextNode") + " " + node.textContent);
 };

-exports.zoomin = ZoominListView;
+exports.zoomin = ZoominListView;
--- a/core/modules/utils/base64-utf8/base64-utf8.module.js
+++ b/core/modules/utils/base64-utf8/base64-utf8.module.js
@ -1,142 +0,0 @@
-// From https://gist.github.com/Nijikokun/5192472
-//
-// UTF8 Module
-//
-// Cleaner and modularized utf-8 encoding and decoding library for javascript.
-//
-// copyright: MIT
-// author: Nijiko Yonskai, @nijikokun, nijikokun@gmail.com
-(function (name, definition, context, dependencies) {
-  if (typeof context['module'] !== 'undefined' && context['module']['exports']) { if (dependencies && context['require']) { for (var i = 0; i < dependencies.length; i++) context[dependencies[i]] = context['require'](dependencies[i]); } context['module']['exports'] = definition.apply(context); }
-  else if (typeof context['define'] !== 'undefined' && context['define'] === 'function' && context['define']['amd']) { define(name, (dependencies || []), definition); }
-  else { context[name] = definition.apply(context); }
-})('utf8', function () {
-  return {
-    encode: function (string) {
-      if (typeof string !== 'string') return string;
-      else string = string.replace(/\r\n/g, "\n");
-      var output = "", i = 0, charCode;
-
-      for (i; i < string.length; i++) {
-        charCode = string.charCodeAt(i);
-
-        if (charCode < 128) {
-          output += String.fromCharCode(charCode);
-        } else if ((charCode > 127) && (charCode < 2048)) {
-          output += String.fromCharCode((charCode >> 6) | 192);
-          output += String.fromCharCode((charCode & 63) | 128);
-        } else if ((charCode > 55295) && (charCode < 57344) && string.length > i+1) {
-          // Surrogate pair
-          var hiSurrogate = charCode;
-          var loSurrogate = string.charCodeAt(i+1);
-          i++;  // Skip the low surrogate on the next loop pass
-          var codePoint = (((hiSurrogate - 55296) << 10) | (loSurrogate - 56320)) + 65536;
-          output += String.fromCharCode((codePoint >> 18) | 240);
-          output += String.fromCharCode(((codePoint >> 12) & 63) | 128);
-          output += String.fromCharCode(((codePoint >> 6) & 63) | 128);
-          output += String.fromCharCode((codePoint & 63) | 128);
-        } else {
-          // Not a surrogate pair, or a dangling surrogate without its partner that we'll just encode as-is
-          output += String.fromCharCode((charCode >> 12) | 224);
-          output += String.fromCharCode(((charCode >> 6) & 63) | 128);
-          output += String.fromCharCode((charCode & 63) | 128);
-        }
-      }
-
-      return output;
-    },
-
-    decode: function (string) {
-      if (typeof string !== 'string') return string;
-      var output = "", i = 0, charCode = 0;
-
-      while (i < string.length) {
-        charCode = string.charCodeAt(i);
-
-        if (charCode < 128) {
-          output += String.fromCharCode(charCode),
-          i++;
-        } else if ((charCode > 191) && (charCode < 224)) {
-          output += String.fromCharCode(((charCode & 31) << 6) | (string.charCodeAt(i + 1) & 63));
-          i += 2;
-        } else if ((charCode > 223) && (charCode < 240)) {
-          output += String.fromCharCode(((charCode & 15) << 12) | ((string.charCodeAt(i + 1) & 63) << 6) | (string.charCodeAt(i + 2) & 63));
-          i += 3;
-        } else {
-          var codePoint = ((charCode & 7) << 18) | ((string.charCodeAt(i + 1) & 63) << 12) | ((string.charCodeAt(i + 2) & 63) << 6) | (string.charCodeAt(i + 3) & 63);
-          // output += String.fromCodePoint(codePoint);  // Can't do this because Internet Explorer doesn't have String.fromCodePoint
-          output += String.fromCharCode(((codePoint - 65536) >> 10) + 55296) + String.fromCharCode(((codePoint - 65536) & 1023) + 56320);  // So we do this instead
-          i += 4;
-        }
-      }
-
-      return output;
-    }
-  };
-}, this);
-
-// Base64 Module
-//
-// Cleaner, modularized and properly scoped base64 encoding and decoding module for strings.
-//
-// copyright: MIT
-// author: Nijiko Yonskai, @nijikokun, nijikokun@gmail.com
-(function (name, definition, context, dependencies) {
-  if (typeof context['module'] !== 'undefined' && context['module']['exports']) { if (dependencies && context['require']) { for (var i = 0; i < dependencies.length; i++) context[dependencies[i]] = context['require'](dependencies[i]); } context['module']['exports'] = definition.apply(context); }
-  else if (typeof context['define'] !== 'undefined' && context['define'] === 'function' && context['define']['amd']) { define(name, (dependencies || []), definition); }
-  else { context[name] = definition.apply(context); }
-})('base64', function (utf8) {
-  var $this = this;
-  var $utf8 = utf8 || this.utf8;
-  var map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
-
-  return {
-    encode: function (input) {
-      if (typeof $utf8 === 'undefined') throw { error: "MissingMethod", message: "UTF8 Module is missing." };
-      if (typeof input !== 'string') return input;
-      else input = $utf8.encode(input);
-      var output = "", a, b, c, d, e, f, g, i = 0;
-
-      while (i < input.length) {
-        a = input.charCodeAt(i++);
-        b = input.charCodeAt(i++);
-        c = input.charCodeAt(i++);
-        d = a >> 2;
-        e = ((a & 3) << 4) | (b >> 4);
-        f = ((b & 15) << 2) | (c >> 6);
-        g = c & 63;
-
-        if (isNaN(b)) f = g = 64;
-        else if (isNaN(c)) g = 64;
-
-        output += map.charAt(d) + map.charAt(e) + map.charAt(f) + map.charAt(g);
-      }
-
-      return output;
-    },
-
-    decode: function (input) {
-      if (typeof $utf8 === 'undefined') throw { error: "MissingMethod", message: "UTF8 Module is missing." };
-      if (typeof input !== 'string') return input;
-      else input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
-      var output = "", a, b, c, d, e, f, g, i = 0;
-
-      while (i < input.length) {
-        d = map.indexOf(input.charAt(i++));
-        e = map.indexOf(input.charAt(i++));
-        f = map.indexOf(input.charAt(i++));
-        g = map.indexOf(input.charAt(i++));
-
-        a = (d << 2) | (e >> 4);
-        b = ((e & 15) << 4) | (f >> 2);
-        c = ((f & 3) << 6) | g;
-
-        output += String.fromCharCode(a);
-        if (f != 64) output += String.fromCharCode(b);
-        if (g != 64) output += String.fromCharCode(c);
-      }
-
-      return $utf8.decode(output);
-    }
-  }
-}, this, [ "utf8" ]);
--- a/core/modules/utils/base64-utf8/base64-utf8.module.min.js
+++ b/core/modules/utils/base64-utf8/base64-utf8.module.min.js
@ -1,9 +0,0 @@
-// From https://gist.github.com/Nijikokun/5192472
-//
-// UTF8 Module
-//
-// Cleaner and modularized utf-8 encoding and decoding library for javascript.
-//
-// copyright: MIT
-// author: Nijiko Yonskai, @nijikokun, nijikokun@gmail.com
-!function(r,e,o,t){void 0!==o.module&&o.module.exports?o.module.exports=e.apply(o):void 0!==o.define&&"function"===o.define&&o.define.amd?define("utf8",[],e):o.utf8=e.apply(o)}(0,function(){return{encode:function(r){if("string"!=typeof r)return r;r=r.replace(/\r\n/g,"\n");for(var e,o="",t=0;t<r.length;t++)if((e=r.charCodeAt(t))<128)o+=String.fromCharCode(e);else if(e>127&&e<2048)o+=String.fromCharCode(e>>6|192),o+=String.fromCharCode(63&e|128);else if(e>55295&&e<57344&&r.length>t+1){var i=e,n=r.charCodeAt(t+1);t++;var d=65536+(i-55296<<10|n-56320);o+=String.fromCharCode(d>>18|240),o+=String.fromCharCode(d>>12&63|128),o+=String.fromCharCode(d>>6&63|128),o+=String.fromCharCode(63&d|128)}else o+=String.fromCharCode(e>>12|224),o+=String.fromCharCode(e>>6&63|128),o+=String.fromCharCode(63&e|128);return o},decode:function(r){if("string"!=typeof r)return r;for(var e="",o=0,t=0;o<r.length;)if((t=r.charCodeAt(o))<128)e+=String.fromCharCode(t),o++;else if(t>191&&t<224)e+=String.fromCharCode((31&t)<<6|63&r.charCodeAt(o+1)),o+=2;else if(t>223&&t<240)e+=String.fromCharCode((15&t)<<12|(63&r.charCodeAt(o+1))<<6|63&r.charCodeAt(o+2)),o+=3;else{var i=(7&t)<<18|(63&r.charCodeAt(o+1))<<12|(63&r.charCodeAt(o+2))<<6|63&r.charCodeAt(o+3);e+=String.fromCharCode(55296+(i-65536>>10))+String.fromCharCode(56320+(i-65536&1023)),o+=4}return e}}},this),function(r,e,o,t){if(void 0!==o.module&&o.module.exports){if(t&&o.require)for(var i=0;i<t.length;i++)o[t[i]]=o.require(t[i]);o.module.exports=e.apply(o)}else void 0!==o.define&&"function"===o.define&&o.define.amd?define("base64",t||[],e):o.base64=e.apply(o)}(0,function(r){var e=r||this.utf8,o="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";return{encode:function(r){if(void 0===e)throw{error:"MissingMethod",message:"UTF8 Module is missing."};if("string"!=typeof r)return r;r=e.encode(r);for(var t,i,n,d,f,a,h,C="",c=0;c<r.length;)d=(t=r.charCodeAt(c++))>>2,f=(3&t)<<4|(i=r.charCodeAt(c++))>>4,a=(15&i)<<2|(n=r.charCodeAt(c++))>>6,h=63&n,isNaN(i)?a=h=64:isNaN(n)&&(h=64),C+=o.charAt(d)+o.charAt(f)+o.charAt(a)+o.charAt(h);return C},decode:function(r){if(void 0===e)throw{error:"MissingMethod",message:"UTF8 Module is missing."};if("string"!=typeof r)return r;r=r.replace(/[^A-Za-z0-9\+\/\=]/g,"");for(var t,i,n,d,f,a,h="",C=0;C<r.length;)t=o.indexOf(r.charAt(C++))<<2|(d=o.indexOf(r.charAt(C++)))>>4,i=(15&d)<<4|(f=o.indexOf(r.charAt(C++)))>>2,n=(3&f)<<6|(a=o.indexOf(r.charAt(C++))),h+=String.fromCharCode(t),64!=f&&(h+=String.fromCharCode(i)),64!=a&&(h+=String.fromCharCode(n));return e.decode(h)}}},this,["utf8"]);
--- a/core/modules/utils/base64-utf8/tiddlywiki.files
+++ b/core/modules/utils/base64-utf8/tiddlywiki.files
@ -1,14 +0,0 @@
-{
-	"tiddlers": [
-		{
-			"file": "base64-utf8.module.min.js",
-			"fields": {
-				"type": "application/javascript",
-				"title": "$:/core/modules/utils/base64-utf8/base64-utf8.module.js",
-				"module-type": "library"
-			},
-			"prefix": "(function(){",
-			"suffix": "}).call(exports);"
-		}
-	]
-}
--- a/core/modules/utils/dom/browser.js
+++ b/core/modules/utils/dom/browser.js
@ -24,6 +24,26 @@ exports.setStyle = function(element,styles) {
 	}
 };

+/*
+Remove style properties of an element
+  element: dom node
+	styleProperties: ordered array of string property names
+*/
+exports.removeStyles = function(element, styleProperties) {
+	for (var i=0; i<styleProperties.length; i++) {
+		element.style.removeProperty($tw.utils.convertStyleNameToPropertyName(styleProperties[i]));
+	}
+}
+
+/*
+Remove single style property of an element
+  element: dom node
+	styleProperty: string property name
+*/
+exports.removeStyle = function(element, styleProperty) {
+	$tw.utils.removeStyles(element, [styleProperty])
+}
+
 /*
 Converts a standard CSS property name into the local browser-specific equivalent. For example:
 	"background-color" --> "backgroundColor"
@ -41,7 +61,7 @@ exports.convertStyleNameToPropertyName = function(styleName) {
 	var propertyName = $tw.utils.unHyphenateCss(styleName);
 	// Then check if it needs a prefix
 	if($tw.browser && document.body.style[propertyName] === undefined) {
-		var prefixes = ["O","MS","Moz","webkit"];
+		var prefixes = ["Moz","webkit"];
 		for(var t=0; t<prefixes.length; t++) {
 			var prefixedName = prefixes[t] + propertyName.substr(0,1).toUpperCase() + propertyName.substr(1);
 			if(document.body.style[prefixedName] !== undefined) {
@ -92,8 +112,6 @@ var eventNameMappings = {
 		correspondingCssProperty: "transition",
 		mappings: {
 			transition: "transitionend",
-			OTransition: "oTransitionEnd",
-			MSTransition: "msTransitionEnd",
 			MozTransition: "transitionend",
 			webkitTransition: "webkitTransitionEnd"
 		}
@ -102,8 +120,6 @@ var eventNameMappings = {
 		correspondingCssProperty: "animation",
 		mappings: {
 			animation: "animationend",
-			OAnimation: "oAnimationEnd",
-			MSAnimation: "msAnimationEnd",
 			MozAnimation: "animationend",
 			webkitAnimation: "webkitAnimationEnd"
 		}
@ -136,19 +152,15 @@ exports.getFullScreenApis = function() {
 		result = {
 		"_requestFullscreen": db.webkitRequestFullscreen !== undefined ? "webkitRequestFullscreen" :
 							db.mozRequestFullScreen !== undefined ? "mozRequestFullScreen" :
-							db.msRequestFullscreen !== undefined ? "msRequestFullscreen" :
 							db.requestFullscreen !== undefined ? "requestFullscreen" : "",
 		"_exitFullscreen": d.webkitExitFullscreen !== undefined ? "webkitExitFullscreen" :
 							d.mozCancelFullScreen !== undefined ? "mozCancelFullScreen" :
-							d.msExitFullscreen !== undefined ? "msExitFullscreen" :
 							d.exitFullscreen !== undefined ? "exitFullscreen" : "",
 		"_fullscreenElement": d.webkitFullscreenElement !== undefined ? "webkitFullscreenElement" :
 							d.mozFullScreenElement !== undefined ? "mozFullScreenElement" :
-							d.msFullscreenElement !== undefined ? "msFullscreenElement" :
 							d.fullscreenElement !== undefined ? "fullscreenElement" : "",
 		"_fullscreenChange": d.webkitFullscreenElement !== undefined ? "webkitfullscreenchange" :
 							d.mozFullScreenElement !== undefined ? "mozfullscreenchange" :
-							d.msFullscreenElement !== undefined ? "MSFullscreenChange" :
 							d.fullscreenElement !== undefined ? "fullscreenchange" : ""
 	};
 	if(!result._requestFullscreen || !result._exitFullscreen || !result._fullscreenElement || !result._fullscreenChange) {
--- a/core/modules/utils/dom/modal.js
+++ b/core/modules/utils/dom/modal.js
@ -210,7 +210,7 @@ Modal.prototype.display = function(title,options) {
 	bodyWidgetNode.addEventListener("tm-close-tiddler",closeHandler,false);
 	footerWidgetNode.addEventListener("tm-close-tiddler",closeHandler,false);
 	// Whether to close the modal dialog when the mask (area outside the modal) is clicked
-	if(tiddler.fields && (tiddler.fields["mask-closable"] === "yes" || tiddler.fields["mask-closable"] === "true")) {
+	if(tiddler.fields && (tiddler.fields["mask-closable"] === "yes" || tiddler.fields["mask-closable"] === "true" || tiddler.fields["mask-closable"] === "" || "mask-closable" in tiddler.fields === false)) {
 		modalBackdrop.addEventListener("click",closeHandler,false);
 	}
 	// Set the initial styles for the message
--- a/core/modules/utils/messaging.js
+++ b/core/modules/utils/messaging.js
@ -0,0 +1,126 @@
+/*\
+title: $:/core/modules/utils/messaging.js
+type: application/javascript
+module-type: utils-browser
+
+Messaging utilities for use with window.postMessage() etc.
+
+This module intentionally has no dependencies so that it can be included in non-TiddlyWiki projects
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+var RESPONSE_TIMEOUT = 2 * 1000;
+
+/*
+Class to handle subscribing to publishers
+
+target: Target window (eg iframe.contentWindow)
+type: String indicating type of item for which subscriptions are being provided (eg "SAVING")
+onsubscribe: Function to be invoked with err parameter when the subscription is established, or there is a timeout
+onmessage: Function to be invoked when a new message arrives, invoked with (data,callback). The callback is invoked with the argument (response)
+*/
+function BrowserMessagingSubscriber(options) {
+	var self = this;
+	this.target = options.target;
+	this.type = options.type;
+	this.onsubscribe = options.onsubscribe || function() {};
+	this.onmessage = options.onmessage;
+	this.hasConfirmed = false;
+	this.channel = new MessageChannel();
+	this.channel.port1.addEventListener("message",function(event) {
+		if(this.timerID) {
+			clearTimeout(this.timerID);
+			this.timerID = null;		
+		}
+		if(event.data) {
+			if(event.data.verb === "SUBSCRIBED") {
+				self.hasConfirmed = true;
+				self.onsubscribe(null);
+			} else if(event.data.verb === self.type) {
+				self.onmessage(event.data,function(response) {
+					// Send the response back on the supplied port, and then close it
+					event.ports[0].postMessage(response);
+					event.ports[0].close();
+				});
+			}
+		}
+	});
+	// Set a timer so that if we don't hear from the iframe before a timeout we alert the user
+	this.timerID = setTimeout(function() {
+		if(!self.hasConfirmed) {
+			self.onsubscribe("NO_RESPONSE");				
+		}
+	},RESPONSE_TIMEOUT);
+	this.channel.port1.start();
+	this.target.postMessage({verb: "SUBSCRIBE",to: self.type},"*",[this.channel.port2]);
+}
+
+exports.BrowserMessagingSubscriber = BrowserMessagingSubscriber;
+
+/*
+Class to handle publishing subscriptions
+
+type: String indicating type of item for which subscriptions are being provided (eg "SAVING")
+onsubscribe: Function to be invoked when a subscription occurs
+*/
+function BrowserMessagingPublisher(options) {
+	var self = this;
+	this.type = options.type;
+	this.hostIsListening = false;
+	this.port = null;
+	// Listen to connection requests from the host
+	window.addEventListener("message",function(event) {
+		if(event.data && event.data.verb === "SUBSCRIBE" && event.data.to === self.type) {
+			self.hostIsListening = true;
+			// Acknowledge
+			self.port = event.ports[0];
+			self.port.postMessage({verb: "SUBSCRIBED", to: self.type});
+			if(options.onsubscribe) {
+				options.onsubscribe(event.data);
+			}
+		}
+	});
+}
+
+BrowserMessagingPublisher.prototype.canSend = function() {
+	return !!this.hostIsListening && !!this.port;
+};
+
+BrowserMessagingPublisher.prototype.send = function(data,callback) {
+	var self = this;
+	callback = callback || function() {};
+	// Check that we've been initialised by the host
+	if(!this.hostIsListening || !this.port) {
+		return false;
+	}
+	// Create a channel for the confirmation
+	var channel = new MessageChannel();
+	channel.port1.addEventListener("message",function(event) {
+		if(event.data && event.data.verb === "OK") {
+			callback(null);
+		} else {
+			callback("BrowserMessagingPublisher for " +  self.type + " error: " + (event.data || {}).verb);
+		}
+		channel.port1.close();
+	});
+	channel.port1.start();
+	// Send the save request with the port for the response
+	this.port.postMessage(data,[channel.port2]);
+};
+
+BrowserMessagingPublisher.prototype.close = function() {
+	if(this.port) {
+		this.port.close();
+		this.hostIsListening = false;
+		this.port = null;		
+	}
+};
+
+exports.BrowserMessagingPublisher = BrowserMessagingPublisher;
+
+})();
--- a/core/modules/utils/parsetree.js
+++ b/core/modules/utils/parsetree.js
@ -119,3 +119,19 @@ exports.getParseTreeText = function getParseTreeText(tree) {
 	}
 	return output.join("");
 };
+
+exports.getParser = function(type,options) {
+	options = options || {};
+	// Select a parser
+	var Parser = $tw.Wiki.parsers[type];
+	if(!Parser && $tw.utils.getFileExtensionInfo(type)) {
+		Parser = $tw.Wiki.parsers[$tw.utils.getFileExtensionInfo(type).type];
+	}
+	if(!Parser) {
+		Parser = $tw.Wiki.parsers[options.defaultType || "text/vnd.tiddlywiki"];
+	}
+	if(!Parser) {
+		return null;
+	}
+	return Parser;
+};
--- a/core/modules/utils/pluginmaker.js
+++ b/core/modules/utils/pluginmaker.js
@ -60,7 +60,7 @@ exports.repackPlugin = function(title,additionalTiddlers,excludeTiddlers) {
 		version += "+" + pluginVersion.build;
 	}
 	// Save the tiddler
-	$tw.wiki.addTiddler(new $tw.Tiddler(pluginTiddler,{text: JSON.stringify({tiddlers: plugins},null,4), version: version}));
+	$tw.wiki.addTiddler(new $tw.Tiddler(pluginTiddler,{text: JSON.stringify({tiddlers: plugins},null,4), version: version},$tw.wiki.getModificationFields()));
 	// Delete any non-shadow constituent tiddlers
 	$tw.utils.each(tiddlers,function(title) {
 		if($tw.wiki.tiddlerExists(title)) {
--- a/core/modules/utils/utils.js
+++ b/core/modules/utils/utils.js
@ -9,8 +9,6 @@ Various static utility functions.

 "use strict";

-var base64utf8 = require("$:/core/modules/utils/base64-utf8/base64-utf8.module.js");
-
 /*
 Display a message, in colour if we're on a terminal
 */
@ -792,22 +790,50 @@ if(typeof window !== 'undefined') {
 	}
 }

+exports.base64ToBytes = function(base64) {
+	const binString = exports.atob(base64);
+	return Uint8Array.from(binString, (m) => m.codePointAt(0));
+};
+
+exports.bytesToBase64 = function(bytes) {
+	const binString = Array.from(bytes, (byte) => String.fromCodePoint(byte)).join("");
+	return exports.btoa(binString);
+};
+
+exports.base64EncodeUtf8 = function(str) {
+	if ($tw.browser) {
+		return exports.bytesToBase64(new TextEncoder().encode(str));
+	} else {
+		const buff = Buffer.from(str, "utf-8");
+		return buff.toString("base64");
+	}
+};
+
+exports.base64DecodeUtf8 = function(str) {
+	if ($tw.browser) {
+		return new TextDecoder().decode(exports.base64ToBytes(str));
+	} else {
+		const buff = Buffer.from(str, "base64");
+		return buff.toString("utf-8");
+	}
+};
+
 /*
 Decode a base64 string
 */
 exports.base64Decode = function(string64,binary,urlsafe) {
-	var encoded = urlsafe ? string64.replace(/_/g,'/').replace(/-/g,'+') : string64;
+	const encoded = urlsafe ? string64.replace(/_/g,'/').replace(/-/g,'+') : string64;
 	if(binary) return exports.atob(encoded)
-	else return base64utf8.base64.decode.call(base64utf8,encoded);
+	else return exports.base64DecodeUtf8(encoded);
 };

 /*
 Encode a string to base64
 */
 exports.base64Encode = function(string64,binary,urlsafe) {
-	var encoded;
+	let encoded;
 	if(binary) encoded = exports.btoa(string64);
-	else encoded = base64utf8.base64.encode.call(base64utf8,string64);
+	else encoded = exports.base64EncodeUtf8(string64);
 	if(urlsafe) {
 		encoded = encoded.replace(/\+/g,'-').replace(/\//g,'_');
 	}
@ -942,7 +968,7 @@ exports.makeCompareFunction = function(type,options) {
 				return compare(dateA,dateB);
 			},
 			"version": function(a,b) {
-				return $tw.utils.compareVersions(a,b);
+				return compare($tw.utils.compareVersions(a,b),0);
 			},
 			"alphanumeric": function(a,b) {
 				if(!isCaseSensitive) {
--- a/core/modules/widgets/action-log.js
+++ b/core/modules/widgets/action-log.js
@ -51,23 +51,29 @@ LogWidget.prototype.invokeAction = function(triggeringWidget,event) {
 };

 LogWidget.prototype.log = function() {
-	var data = {},
+	var self = this,
+		data = {}, // Hashmap by attribute name with string or array of string values
 		dataCount,
-		allVars = {},
+		allVars = {}, // Hashmap by variable name with string or array of string values
 		filteredVars;
-
-	$tw.utils.each(this.attributes,function(attribute,name) {
+	// Collect the attributes to be logged
+	$tw.utils.each(this.parseTreeNode.attributes,function(attribute,name) {
 		if(name.substring(0,2) !== "$$") {
-			data[name] = attribute;
+			var resultList = self.computeAttribute(attribute,{asList: true});
+			if(resultList.length <= 1) {
+				data[name] = resultList[0] || "";
+			} else {
+				data[name] = resultList;
+			}
 		}
 	});
-
+	// Collect values of all variables, using the source text for functions
 	for(var v in this.variables) {
-		var variable = this.parentWidget && this.parentWidget.variables[v];
-		if(variable && variable.isFunctionDefinition) {
-			allVars[v] = variable.value;
+		var variableInfo = this.getVariableInfo(v);
+		if(variableInfo && variableInfo.srcVariable && variableInfo.srcVariable.isFunctionDefinition) {
+			allVars[v] = variableInfo.text;
 		} else {
-			allVars[v]  = this.getVariable(v,{defaultValue:""});
+			allVars[v] = variableInfo.resultList.length > 1 ? variableInfo.resultList : variableInfo.text;
 		}
 	}
 	if(this.filter) {
--- a/core/modules/widgets/audio.js
+++ b/core/modules/widgets/audio.js
@ -0,0 +1,103 @@
+/*\
+title: $:/core/modules/widgets/audio.js
+type: application/javascript
+module-type: widget
+
+Basic Audio widget for displaying audio files.
+This is a simple implementation that can be overridden by plugins
+for more advanced functionality.
+
+\*/
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+var Widget = require("$:/core/modules/widgets/widget.js").widget;
+
+var AudioWidget = function(parseTreeNode,options) {
+	this.initialise(parseTreeNode,options);
+};
+
+/*
+Inherit from the base widget class
+*/
+AudioWidget.prototype = new Widget();
+
+/*
+Render this widget into the DOM
+*/
+AudioWidget.prototype.render = function(parent,nextSibling) {
+	this.parentDomNode = parent;
+	this.computeAttributes();
+	this.execute();
+	
+	// Create audio element
+	var audioElement = this.document.createElement("audio");
+	audioElement.setAttribute("controls", this.getAttribute("controls", "controls"));
+	audioElement.setAttribute("style", this.getAttribute("style", "width: 100%; object-fit: contain"));
+	audioElement.className = "tw-audio-element";
+	
+	// Set source
+	if(this.audioSource) {
+		if (this.audioSource.indexOf("data:") === 0) {
+			audioElement.setAttribute("src", this.audioSource);
+		} else {
+			var sourceElement = this.document.createElement("source");
+			sourceElement.setAttribute("src", this.audioSource);
+			if(this.audioType) {
+				sourceElement.setAttribute("type", this.audioType);
+			}
+			audioElement.appendChild(sourceElement);
+		}
+	}
+	
+	// Insert the audio into the DOM
+	parent.insertBefore(audioElement, nextSibling);
+	this.domNodes.push(audioElement);
+};
+
+/*
+Compute the internal state of the widget
+*/
+AudioWidget.prototype.execute = function() {
+	// Get the audio source and type
+	this.audioSource = this.getAttribute("src");
+	this.audioType = this.getAttribute("type");
+	this.audioControls = this.getAttribute("controls", "controls");
+	
+	// Try to get from tiddler attribute
+	if(!this.audioSource && this.getAttribute("tiddler")) {
+		var tiddlerTitle = this.getAttribute("tiddler");
+		var tiddler = this.wiki.getTiddler(tiddlerTitle);
+		if(tiddler) {
+			if(tiddler.fields._canonical_uri) {
+				this.audioSource = tiddler.fields._canonical_uri;
+				this.audioType = tiddler.fields.type;
+			} else if(tiddler.fields.text) {
+				this.audioSource = "data:" + tiddler.fields.type + ";base64," + tiddler.fields.text;
+				this.audioType = tiddler.fields.type;
+			}
+		}
+	}
+	
+	// Make sure we have a tiddler for saving timestamps
+	this.tiddlerTitle = this.getAttribute("tiddler");
+};
+
+/*
+Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
+*/
+AudioWidget.prototype.refresh = function(changedTiddlers) {
+	var changedAttributes = this.computeAttributes();
+	if(changedAttributes.src || changedAttributes.type || changedAttributes.controls || changedAttributes.tiddler) {
+		this.refreshSelf();
+		return true;
+	} else {
+		return false;
+	}
+};
+
+exports.audio = AudioWidget;
+
+
--- a/core/modules/widgets/button.js
+++ b/core/modules/widgets/button.js
@ -61,6 +61,10 @@ ButtonWidget.prototype.render = function(parent,nextSibling) {
 		sourcePrefix: "data-",
 		destPrefix: "data-"
 	});
+	this.assignAttributes(domNode,{
+		sourcePrefix: "aria-",
+		destPrefix: "aria-"
+	});
 	// Assign other attributes
 	if(this.style) {
 		domNode.setAttribute("style",this.style);
@ -68,9 +72,6 @@ ButtonWidget.prototype.render = function(parent,nextSibling) {
 	if(this.tooltip) {
 		domNode.setAttribute("title",this.tooltip);
 	}
-	if(this["aria-label"]) {
-		domNode.setAttribute("aria-label",this["aria-label"]);
-	}
 	if (this.role) {
 		domNode.setAttribute("role", this.role);
 	}
@ -215,7 +216,6 @@ ButtonWidget.prototype.execute = function() {
 	this.setTo = this.getAttribute("setTo");
 	this.popup = this.getAttribute("popup");
 	this.hover = this.getAttribute("hover");
-	this["aria-label"] = this.getAttribute("aria-label");
 	this.role = this.getAttribute("role");
 	this.tooltip = this.getAttribute("tooltip");
 	this.style = this.getAttribute("style");
@ -271,6 +271,10 @@ ButtonWidget.prototype.refresh = function(changedTiddlers) {
 			sourcePrefix: "data-",
 			destPrefix: "data-"
 		});
+		this.assignAttributes(this.domNodes[0],{
+			sourcePrefix: "aria-",
+			destPrefix: "aria-"
+		});
 	}
 	return this.refreshChildren(changedTiddlers);
 };
--- a/core/modules/widgets/droppable.js
+++ b/core/modules/widgets/droppable.js
@ -177,7 +177,7 @@ DroppableWidget.prototype.execute = function() {
 DroppableWidget.prototype.assignDomNodeClasses = function() {
 	var classes = this.getAttribute("class","").split(" ");
 	classes.push("tc-droppable");
-	this.domNode.className = classes.join(" ");
+	this.domNode.className = classes.join(" ").trim();
 };

 /*
--- a/core/modules/widgets/element.js
+++ b/core/modules/widgets/element.js
@ -74,6 +74,8 @@ ElementWidget.prototype.render = function(parent,nextSibling) {
 	// Create the DOM node and render children
 	var domNode = this.document.createElementNS(this.namespace,this.tag);
 	this.assignAttributes(domNode,{excludeEventAttributes: true});
+	// Allow hooks to manipulate the DOM node. Eg: Add debug info
+	$tw.hooks.invokeHook("th-dom-rendering-element", domNode, this);
 	parent.insertBefore(domNode,nextSibling);
 	this.renderChildren(domNode,null);
 	this.domNodes.push(domNode);
--- a/core/modules/widgets/eventcatcher.js
+++ b/core/modules/widgets/eventcatcher.js
@ -44,7 +44,7 @@ EventWidget.prototype.render = function(parent,nextSibling) {
 		domNode.addEventListener(type,function(event) {
 			var selector = self.getAttribute("selector"),
 				matchSelector = self.getAttribute("matchSelector"),
-				actions = self.getAttribute("$"+type) || self.getAttribute("actions-"+type),
+				actions = self.getAttribute("$"+type),
 				stopPropagation = self.getAttribute("stopPropagation","onaction"),
 				selectedNode = event.target,
 				selectedNodeRect,
@ -122,9 +122,6 @@ EventWidget.prototype.execute = function() {
 			self.types.push(key.slice(1));
 		}
 	});
-	if(!this.types.length) {
-		this.types = this.getAttribute("events","").split(" ");
-	}
 	this.elementTag = this.getAttribute("tag");
 	// Make child widgets
 	this.makeChildWidgets();
@ -133,7 +130,7 @@ EventWidget.prototype.execute = function() {
 EventWidget.prototype.assignDomNodeClasses = function() {
 	var classes = this.getAttribute("class","").split(" ");
 	classes.push("tc-eventcatcher");
-	this.domNode.className = classes.join(" ");
+	this.domNode.className = classes.join(" ").trim();
 };

 /*
--- a/core/modules/widgets/importvariables.js
+++ b/core/modules/widgets/importvariables.js
@ -49,7 +49,8 @@ ImportVariablesWidget.prototype.execute = function(tiddlerList) {
 		var parser = widgetPointer.wiki.parseTiddler(title,{parseAsInline:true, configTrimWhiteSpace:false});
 		if(parser) {
 			var parseTreeNode = parser.tree[0];
-			while(parseTreeNode && ["setvariable","set","parameters"].indexOf(parseTreeNode.type) !== -1) {
+			// process AST nodes generated by pragma rules.
+			while(parseTreeNode && ["setvariable","set","parameters","void"].indexOf(parseTreeNode.type) !== -1) {
 				var node = {
 					type: "set",
 					attributes: parseTreeNode.attributes,
@ -82,7 +83,7 @@ ImportVariablesWidget.prototype.execute = function(tiddlerList) {
 						// this widget. If it needs to refresh,
 						// it'll do so along with the the whole
 						// importvariable tree.
-						if (widgetPointer != this) {
+						if(widgetPointer != this) {
 							widgetPointer.makeChildWidgets = function(){};
 						}
 						widgetPointer = widgetPointer.children[0];
@ -93,7 +94,7 @@ ImportVariablesWidget.prototype.execute = function(tiddlerList) {
 		} 
 	});

-	if (widgetPointer != this) {
+	if(widgetPointer != this) {
 		widgetPointer.parseTreeNode.children = this.parseTreeNode.children;
 	} else {
 		widgetPointer.makeChildWidgets();
--- a/core/modules/widgets/keyboard.js
+++ b/core/modules/widgets/keyboard.js
@ -110,7 +110,7 @@ KeyboardWidget.prototype.execute = function() {
 KeyboardWidget.prototype.assignDomNodeClasses = function() {
 	var classes = this.getAttribute("class","").split(" ");
 	classes.push("tc-keyboard");
-	this.domNode.className = classes.join(" ");
+	this.domNode.className = classes.join(" ").trim();
 };

 /*
--- a/core/modules/widgets/let.js
+++ b/core/modules/widgets/let.js
@ -46,7 +46,7 @@ LetWidget.prototype.computeAttributes = function() {
 		self = this;
 	this.currentValueFor = Object.create(null);
 	$tw.utils.each($tw.utils.getOrderedAttributesFromParseTreeNode(this.parseTreeNode),function(attribute) {
-		var value = self.computeAttribute(attribute),
+		var value = self.computeAttribute(attribute,{asList: true}),
 			name = attribute.name;
 		// Now that it's prepped, we're allowed to look this variable up
 		// when defining later variables
@ -56,7 +56,7 @@ LetWidget.prototype.computeAttributes = function() {
 	});
 	// Run through again, setting variables and looking for differences
 	$tw.utils.each(this.currentValueFor,function(value,name) {
-		if (self.attributes[name] !== value) {
+		if(!$tw.utils.isArrayEqual(self.attributes[name],value)) {
 			self.attributes[name] = value;
 			self.setVariable(name,value);
 			changedAttributes[name] = true;
@ -69,8 +69,10 @@ LetWidget.prototype.getVariableInfo = function(name,options) {
 	// Special handling: If this variable exists in this very $let, we can
 	// use it, but only if it's been staged.
 	if ($tw.utils.hop(this.currentValueFor,name)) {
+		var value = this.currentValueFor[name];
 		return {
-			text: this.currentValueFor[name]
+			text: value[0] || "",
+			resultList: value
 		};
 	}
 	return Widget.prototype.getVariableInfo.call(this,name,options);
--- a/core/modules/widgets/link.js
+++ b/core/modules/widgets/link.js
@ -45,6 +45,10 @@ LinkWidget.prototype.render = function(parent,nextSibling) {
 			sourcePrefix: "data-",
 			destPrefix: "data-"
 		});
+		this.assignAttributes(domNode,{
+			sourcePrefix: "aria-",
+			destPrefix: "aria-"
+		});
 		parent.insertBefore(domNode,nextSibling);
 		this.renderChildren(domNode,null);
 		this.domNodes.push(domNode);
@ -125,9 +129,13 @@ LinkWidget.prototype.renderLink = function(parent,nextSibling) {
 			});
 		domNode.setAttribute("title",tooltipText);
 	}
-	if(this["aria-label"]) {
-		domNode.setAttribute("aria-label",this["aria-label"]);
+	if(this.role) {
+		domNode.setAttribute("role",this.role);
 	}
+	this.assignAttributes(domNode,{
+		sourcePrefix: "aria-",
+		destPrefix: "aria-"
+	})
 	// Add a click event handler
 	$tw.utils.addEventListeners(domNode,[
 		{name: "click", handlerObject: this, handlerMethod: "handleClickEvent"},
@ -139,6 +147,8 @@ LinkWidget.prototype.renderLink = function(parent,nextSibling) {
 			dragTiddlerFn: function() {return self.to;},
 			widget: this
 		});
+	} else if(this.draggable === "no") {
+		domNode.setAttribute("draggable","false");
 	}
 	// Assign data- attributes
 	this.assignAttributes(domNode,{
@ -188,7 +198,7 @@ LinkWidget.prototype.execute = function() {
 	// Pick up our attributes
 	this.to = this.getAttribute("to",this.getVariable("currentTiddler"));
 	this.tooltip = this.getAttribute("tooltip");
-	this["aria-label"] = this.getAttribute("aria-label");
+	this.role = this.getAttribute("role");
 	this.linkClasses = this.getAttribute("class");
 	this.overrideClasses = this.getAttribute("overrideClass");
 	this.tabIndex = this.getAttribute("tabindex");
--- a/core/modules/widgets/range.js
+++ b/core/modules/widgets/range.js
@ -94,8 +94,6 @@ RangeWidget.prototype.getActionVariables = function(options) {

 // actionsStart
 RangeWidget.prototype.handleMouseDownEvent = function(event) {
-	this.mouseDown = true; // TODO remove once IE is gone.
-	this.startValue = this.inputDomNode.value; // TODO remove this line once IE is gone!
 	this.handleEvent(event);
 	// Trigger actions
 	if(this.actionsMouseDown) {
@ -106,26 +104,16 @@ RangeWidget.prototype.handleMouseDownEvent = function(event) {

 // actionsStop
 RangeWidget.prototype.handleMouseUpEvent = function(event) {
-	this.mouseDown = false; // TODO remove once IE is gone.
 	this.handleEvent(event);
 	// Trigger actions
 	if(this.actionsMouseUp) {
 		var variables = this.getActionVariables()
 		this.invokeActionString(this.actionsMouseUp,this,event,variables);
 	}
-	// TODO remove the following if() once IE is gone!
-	if ($tw.browser.isIE) {
-		if (this.startValue !== this.inputDomNode.value) {
-			this.handleChangeEvent(event);
-			this.startValue = this.inputDomNode.value;
-		}
-	}
 }

 RangeWidget.prototype.handleChangeEvent = function(event) {
-	if (this.mouseDown) {  // TODO refactor this function once IE is gone.
-		this.handleInputEvent(event);
-	}
+	this.handleInputEvent(event);
 };

 RangeWidget.prototype.handleInputEvent = function(event) {
@ -152,8 +140,6 @@ RangeWidget.prototype.handleEvent = function(event) {
 Compute the internal state of the widget
 */
 RangeWidget.prototype.execute = function() {
-	// TODO remove the next 1 lines once IE is gone!
-	this.mouseUp = true; // Needed for IE10
 	// Get the parameters from the attributes
 	this.tiddlerTitle = this.getAttribute("tiddler",this.getVariable("currentTiddler"));
 	this.tiddlerField = this.getAttribute("field","text");
--- a/core/modules/widgets/reveal.js
+++ b/core/modules/widgets/reveal.js
@ -203,7 +203,7 @@ RevealWidget.prototype.readPopupState = function(state) {
 RevealWidget.prototype.assignDomNodeClasses = function() {
 	var classes = this.getAttribute("class","").split(" ");
 	classes.push("tc-reveal");
-	this.domNode.className = classes.join(" ");
+	this.domNode.className = classes.join(" ").trim();
 };

 /*
--- a/core/modules/widgets/void.js
+++ b/core/modules/widgets/void.js
@ -0,0 +1,23 @@
+/*\
+title: $:/core/modules/widgets/void.js
+type: application/javascript
+module-type: widget
+
+Void widget that corresponds to pragma and comment AST nodes, etc. It does not render itself but renders all its children.
+
+\*/
+
+"use strict";
+
+var Widget = require("$:/core/modules/widgets/widget.js").widget;
+
+var VoidNodeWidget = function(parseTreeNode,options) {
+	this.initialise(parseTreeNode,options);
+};
+
+/*
+Inherit from the base widget class
+*/
+VoidNodeWidget.prototype = new Widget();
+
+exports.void = VoidNodeWidget;
--- a/core/modules/widgets/widget.js
+++ b/core/modules/widgets/widget.js
@ -80,7 +80,7 @@ Widget.prototype.execute = function() {
 /*
 Set the value of a context variable
 name: name of the variable
-value: value of the variable
+value: value of the variable, can be a string or an array
 params: array of {name:, default:} for each parameter
 isMacroDefinition: true if the variable is set via a \define macro pragma (and hence should have variable substitution performed)
 options includes:
@ -90,8 +90,10 @@ options includes:
 */
 Widget.prototype.setVariable = function(name,value,params,isMacroDefinition,options) {
 	options = options || {};
+	var valueIsArray = $tw.utils.isArray(value);
 	this.variables[name] = {
-		value: value,
+		value: valueIsArray ? (value[0] || "") : value,
+		resultList: valueIsArray ? value : [value],
 		params: params,
 		isMacroDefinition: !!isMacroDefinition,
 		isFunctionDefinition: !!options.isFunctionDefinition,
@ -114,7 +116,7 @@ allowSelfAssigned: if true, includes the current widget in the context chain ins

 Returns an object with the following fields:

-params: array of {name:,value:} or {value:} of parameters to be applied
+params: array of {name:,value:,multiValue:} of parameters to be applied (name is optional)
 text: text of variable, with parameters properly substituted
 resultList: result of variable evaluation as an array
 srcVariable: reference to the object defining the variable
@ -140,7 +142,9 @@ Widget.prototype.getVariableInfo = function(name,options) {
 			params = self.resolveVariableParameters(variable.params,actualParams);
 			// Substitute any parameters specified in the definition
 			$tw.utils.each(params,function(param) {
-				value = $tw.utils.replaceString(value,new RegExp("\\$" + $tw.utils.escapeRegExp(param.name) + "\\$","mg"),param.value);
+				if("name" in param) {
+					value = $tw.utils.replaceString(value,new RegExp("\\$" + $tw.utils.escapeRegExp(param.name) + "\\$","mg"),param.value);
+				}
 			});
 			value = self.substituteVariableReferences(value,options);
 			resultList = [value];
@ -154,13 +158,20 @@ Widget.prototype.getVariableInfo = function(name,options) {
 					variables[param.name] = param["default"];
 				}
 			});
-			// Parameters are an array of {value:} or {name:, value:} pairs
+			// Parameters are an array of {name:, value:, multivalue:} pairs (name and multivalue are optional)
 			$tw.utils.each(params,function(param) {
-				variables[param.name] = param.value;
+				if(param.multiValue) {
+					variables[param.name] = param.multiValue;
+				} else {
+					variables[param.name] = param.value || "";
+				}
 			});
 			resultList = this.wiki.filterTiddlers(value,this.makeFakeWidgetWithVariables(variables),options.source);
 			value = resultList[0] || "";
 		} else {
+			if(variable.resultList) {
+				resultList = variable.resultList;
+			}
 			params = variable.params;
 		}
 		return {
@ -192,22 +203,24 @@ Widget.prototype.getVariable = function(name,options) {
 /*
 Maps actual parameters onto formal parameters, returning an array of {name:,value:} objects
 formalParams - Array of {name:,default:} (default value is optional)
-actualParams - Array of string values or {name:,value:} (name is optional)
+actualParams - Array of string values or {name:,value:,multiValue} (name and multiValue is optional)
 */
 Widget.prototype.resolveVariableParameters = function(formalParams,actualParams) {
 	formalParams = formalParams || [];
 	actualParams = actualParams || [];
 	var nextAnonParameter = 0, // Next candidate anonymous parameter in macro call
-		paramInfo, paramValue,
+		paramInfo, paramValue, paramMultiValue,
 		results = [];
 	// Step through each of the parameters in the macro definition
 	for(var p=0; p<formalParams.length; p++) {
 		// Check if we've got a macro call parameter with the same name
 		paramInfo = formalParams[p];
 		paramValue = undefined;
+		paramMultiValue = undefined;
 		for(var m=0; m<actualParams.length; m++) {
 			if(typeof actualParams[m] !== "string" && actualParams[m].name === paramInfo.name) {
 				paramValue = actualParams[m].value;
+				paramMultiValue = actualParams[m].multiValue || [paramValue]
 			}
 		}
 		// If not, use the next available anonymous macro call parameter
@ -217,11 +230,13 @@ Widget.prototype.resolveVariableParameters = function(formalParams,actualParams)
 		if(paramValue === undefined && nextAnonParameter < actualParams.length) {
 			var param = actualParams[nextAnonParameter++];
 			paramValue = typeof param === "string" ? param : param.value;
+			paramMultiValue = typeof param === "string" ? [param] : (param.multiValue || [paramValue]);
 		}
 		// If we've still not got a value, use the default, if any
 		paramValue = paramValue || paramInfo["default"] || "";
+		paramMultiValue = paramMultiValue || [paramValue];
 		// Store the parameter name and value
-		results.push({name: paramInfo.name, value: paramValue});
+		results.push({name: paramInfo.name, value: paramValue, multiValue: paramMultiValue});
 	}
 	return results;
 };
@ -310,7 +325,7 @@ Widget.prototype.getStateQualifier = function(name) {
 };

 /*
-Make a fake widget with specified variables, suitable for variable lookup in filters
+Make a fake widget with specified variables, suitable for variable lookup in filters. Each variable can be a string or an array of strings
 */
 Widget.prototype.makeFakeWidgetWithVariables = function(variables) {
 	var self = this,
@ -318,7 +333,12 @@ Widget.prototype.makeFakeWidgetWithVariables = function(variables) {
 	return {
 		getVariable: function(name,opts) {
 			if($tw.utils.hop(variables,name)) {
-				return variables[name];
+				var value = variables[name];
+				if($tw.utils.isArray(value)) {
+					return value[0];
+				} else {
+					return value;
+				}
 			} else {
 				opts = opts || {};
 				opts.variables = variables;
@ -327,9 +347,18 @@ Widget.prototype.makeFakeWidgetWithVariables = function(variables) {
 		},
 		getVariableInfo: function(name,opts) {
 			if($tw.utils.hop(variables,name)) {
-				return {
-					text: variables[name]
-				};
+				var value = variables[name];
+				if($tw.utils.isArray(value)) {
+					return {
+						text: value[0],
+						resultList: value
+					};
+				} else {
+					return {
+						text: value,
+						resultList: [value]
+					};
+				}
 			} else {
 				opts = opts || {};
 				opts.variables = $tw.utils.extend({},variables,opts.variables);
@ -366,20 +395,45 @@ Widget.prototype.computeAttributes = function(options) {
 	return changedAttributes;
 };

-Widget.prototype.computeAttribute = function(attribute) {
+/*
+Compute the value of a single attribute. Options include:
+asList: boolean if true returns results as an array instead of a single value
+*/
+Widget.prototype.computeAttribute = function(attribute,options) {
+	options = options || {};
 	var self = this,
 		value;
 	if(attribute.type === "filtered") {
-		value = this.wiki.filterTiddlers(attribute.filter,this)[0] || "";
+		value = this.wiki.filterTiddlers(attribute.filter,this);
+		if(!options.asList) {
+			value = value[0] || "";
+		}
 	} else if(attribute.type === "indirect") {
-		value = this.wiki.getTextReference(attribute.textReference,"",this.getVariable("currentTiddler")) || "";
+		value = this.wiki.getTextReference(attribute.textReference,"",this.getVariable("currentTiddler"));
+		if(value && options.asList) {
+			value = [value];
+		}
 	} else if(attribute.type === "macro") {
 		var variableInfo = this.getVariableInfo(attribute.value.name,{params: attribute.value.params});
-		value = variableInfo.text;
+		if(options.asList) {
+			value = variableInfo.resultList;
+		} else {
+			value = variableInfo.text;
+		}
 	} else if(attribute.type === "substituted") {
 		value = this.wiki.getSubstitutedText(attribute.rawValue,this) || "";
+		if(options.asList) {
+			value = [value];
+		}
 	} else { // String attribute
 		value = attribute.value;
+		if(options.asList) {
+			if(value === undefined) {
+				value = [];
+			} else {
+				value = [value];
+			}
+		}
 	}
 	return value;
 };
--- a/core/modules/wiki.js
+++ b/core/modules/wiki.js
@ -1059,17 +1059,7 @@ Options include:
 exports.parseText = function(type,text,options) {
 	text = text || "";
 	options = options || {};
-	// Select a parser
-	var Parser = $tw.Wiki.parsers[type];
-	if(!Parser && $tw.utils.getFileExtensionInfo(type)) {
-		Parser = $tw.Wiki.parsers[$tw.utils.getFileExtensionInfo(type).type];
-	}
-	if(!Parser) {
-		Parser = $tw.Wiki.parsers[options.defaultType || "text/vnd.tiddlywiki"];
-	}
-	if(!Parser) {
-		return null;
-	}
+	var Parser = $tw.utils.getParser(type,options)
 	// Return the parser instance
 	return new Parser(type,text,{
 		parseAsInline: options.parseAsInline,
@ -1083,7 +1073,7 @@ exports.parseText = function(type,text,options) {
 Parse a tiddler according to its MIME type
 */
 exports.parseTiddler = function(title,options) {
-	options = $tw.utils.extend({},options);
+	options = options || {};
 	var cacheType = options.parseAsInline ? "inlineParseTree" : "blockParseTree",
 		tiddler = this.getTiddler(title),
 		self = this;
@ -1443,7 +1433,7 @@ exports.search = function(text,options) {
 			// Don't search the text field if the content type is binary
 			var fieldName = searchFields[fieldIndex];
 			if(fieldName === "text" && contentTypeInfo.encoding !== "utf8") {
-				break;
+				continue;
 			}
 			var str = tiddler.fields[fieldName],
 				t;
--- a/core/palettes/BrightMute.tid
+++ b/core/palettes/BrightMute.tid
@ -47,6 +47,7 @@ modal-footer-background: #f5f5f5
 modal-footer-border: #dddddd
 modal-header-border: #eeeeee
 muted-foreground: #bbb
+network-activity-foreground: <<colour primary>>
 notification-background: #ffffdd
 notification-border: #999999
 page-background: #6f6f70
@ -56,22 +57,26 @@ primary: #29a6ee
 select-tag-background:
 select-tag-foreground:
 sidebar-button-foreground: <<colour foreground>>
-sidebar-controls-foreground-hover: #000000
+sidebar-controls-foreground-hover: #222222
 sidebar-controls-foreground: #c2c1c2
-sidebar-foreground-shadow: rgba(255,255,255,0)
+sidebar-foreground-shadow: transparent
 sidebar-foreground: #d3d2d4
-sidebar-muted-foreground-hover: #444444
+sidebar-muted-foreground-hover: #333333
 sidebar-muted-foreground: #c0c0c0
 sidebar-tab-background-selected: #6f6f70
 sidebar-tab-background: #666667
 sidebar-tab-border-selected: #999
 sidebar-tab-border: #515151
 sidebar-tab-divider: #999
-sidebar-tab-foreground-selected: 
-sidebar-tab-foreground: #999
+sidebar-tab-foreground-selected: #bfbfbf
+sidebar-tab-foreground: #b0b0b0
 sidebar-tiddler-link-foreground-hover: #444444
-sidebar-tiddler-link-foreground: #d1d0d2
+sidebar-tiddler-link-foreground: #aaaaaa
 site-title-foreground: <<colour tiddler-title-foreground>>
+stability-deprecated: #bf616a
+stability-experimental: #d08770
+stability-legacy: #88c0d0
+stability-stable: #a3be8c
 static-alert-foreground: #aaaaaa
 tab-background-selected: #ffffff
 tab-background: #d8d8d8
--- a/core/templates/external-js/tiddlywiki5-external-js.html.tid
+++ b/core/templates/external-js/tiddlywiki5-external-js.html.tid
@ -1,12 +1,13 @@
 title: $:/core/templates/tiddlywiki5-external-js.html

 <$set name="saveTiddlerAndShadowsFilter" filter="[subfilter<saveTiddlerFilter>] [subfilter<saveTiddlerFilter>plugintiddlers[]]">
+<$set name="rawMarkupFilter" filter="[enlist<saveTiddlerAndShadowsFilter>] [[$:/core]plugintiddlers[]]">
 `<!doctype html>
 `{{$:/core/templates/MOTW.html}}`<html lang="`<$text text={{{ [{$:/language}get[name]] }}}/>`">
 <head>
 <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
 <!--~~ Raw markup for the top of the head section ~~-->
-`{{{ [enlist<saveTiddlerAndShadowsFilter>tag[$:/tags/RawMarkupWikified/TopHead]] ||$:/core/templates/raw-static-tiddler}}}`
+`{{{ [enlist<rawMarkupFilter>tag[$:/tags/RawMarkupWikified/TopHead]] ||$:/core/templates/raw-static-tiddler}}}`
 <meta http-equiv="X-UA-Compatible" content="IE=Edge"/>
 <meta name="application-name" content="TiddlyWiki" />
 <meta name="generator" content="TiddlyWiki" />
@ -22,13 +23,13 @@ title: $:/core/templates/tiddlywiki5-external-js.html
 <!--~~ This is a Tiddlywiki file. The points of interest in the file are marked with this pattern ~~-->

 <!--~~ Raw markup ~~-->
-`{{{ [enlist<saveTiddlerAndShadowsFilter>tag[$:/core/wiki/rawmarkup]] ||$:/core/templates/plain-text-tiddler}}}`
-`{{{ [enlist<saveTiddlerAndShadowsFilter>tag[$:/tags/RawMarkup]] ||$:/core/templates/plain-text-tiddler}}}`
-`{{{ [enlist<saveTiddlerAndShadowsFilter>tag[$:/tags/RawMarkupWikified]] ||$:/core/templates/raw-static-tiddler}}}`
+`{{{ [enlist<rawMarkupFilter>tag[$:/core/wiki/rawmarkup]] ||$:/core/templates/plain-text-tiddler}}}`
+`{{{ [enlist<rawMarkupFilter>tag[$:/tags/RawMarkup]] ||$:/core/templates/plain-text-tiddler}}}`
+`{{{ [enlist<rawMarkupFilter>tag[$:/tags/RawMarkupWikified]] ||$:/core/templates/raw-static-tiddler}}}`
 </head>
 <body class="tc-body">
 <!--~~ Raw markup for the top of the body section ~~-->
-`{{{ [enlist<saveTiddlerAndShadowsFilter>tag[$:/tags/RawMarkupWikified/TopBody]] ||$:/core/templates/raw-static-tiddler}}}`
+`{{{ [enlist<rawMarkupFilter>tag[$:/tags/RawMarkupWikified/TopBody]] ||$:/core/templates/raw-static-tiddler}}}`
 <!--~~ Static styles ~~-->
 <div id="styleArea">
 `{{$:/boot/boot.css||$:/core/templates/css-tiddler}}`
@ -42,9 +43,10 @@ title: $:/core/templates/tiddlywiki5-external-js.html
 <!--~~ Ordinary tiddlers ~~-->
 `{{$:/core/templates/store.area.template.html}}`
 <!--~~ Raw markup for the bottom of the body section ~~-->
-`{{{ [enlist<saveTiddlerAndShadowsFilter>tag[$:/tags/RawMarkupWikified/BottomBody]] ||$:/core/templates/raw-static-tiddler}}}`
+`{{{ [enlist<rawMarkupFilter>tag[$:/tags/RawMarkupWikified/BottomBody]] ||$:/core/templates/raw-static-tiddler}}}`
 <!--~~ Load external JavaScripts ~~-->
 <script src="`{{{ [<coreURL>] }}}`" onerror="alert('Error: Cannot load `{{{ [<coreURL>] }}}`');"></script>
 </body>
 </html>`
+</$set>
 </$set>
--- a/core/ui/AdvancedSearch/Filter.tid
+++ b/core/ui/AdvancedSearch/Filter.tid
@ -62,28 +62,34 @@ caption: {{$:/language/Search/Filter/Caption}}
 </$list>
 \end

+\procedure input-actions()
+<%if [<event-key-descriptor>match[((input-tab-right))]] %>
+<<set-next-input-tab>>
+<%elseif [<event-key-descriptor>match[((input-tab-left))]] %>
+<<set-previous-input-tab>>
+<%endif%>
+\end
+
 \whitespace trim

 <<lingo Filter/Hint>>

 <div class="tc-search tc-advanced-search">
-	<$keyboard key="((input-tab-right))" actions=<<set-next-input-tab>> class="tc-small-gap-right">
-		<$keyboard key="((input-tab-left))" actions=<<set-previous-input-tab>>>
-			<$transclude $variable="keyboard-driven-input"
-				tiddler="$:/temp/advancedsearch/input"
-				storeTitle="$:/temp/advancedsearch"
-				refreshTitle="$:/temp/advancedsearch/refresh"
-				selectionStateTitle="$:/temp/advancedsearch/selected-item"
-				type="search"
-				tag="input"
-				focus={{$:/config/Search/AutoFocus}}
-				configTiddlerFilter="[[$:/temp/advancedsearch]]"
-				firstSearchFilterField="text"
-				inputAcceptActions=<<input-accept-actions>>
-				inputAcceptVariantActions=<<input-accept-variant-actions>>
-				inputCancelActions=<<cancel-search-actions>>
-			/>
-		</$keyboard>
+	<$keyboard key="((input-tab-right)) ((input-tab-left))" actions=<<input-actions>> class="tc-small-gap-right">
+		<$transclude $variable="keyboard-driven-input"
+			tiddler="$:/temp/advancedsearch/input"
+			storeTitle="$:/temp/advancedsearch"
+			refreshTitle="$:/temp/advancedsearch/refresh"
+			selectionStateTitle="$:/temp/advancedsearch/selected-item"
+			type="search"
+			tag="input"
+			focus={{$:/config/Search/AutoFocus}}
+			configTiddlerFilter="[[$:/temp/advancedsearch]]"
+			firstSearchFilterField="text"
+			inputAcceptActions=<<input-accept-actions>>
+			inputAcceptVariantActions=<<input-accept-variant-actions>>
+			inputCancelActions=<<cancel-search-actions>>
+		/>
 	</$keyboard>
 	<$list filter="[all[shadows+tiddlers]tag[$:/tags/AdvancedSearch/FilterButton]!has[draft.of]]">
 		<$transclude/>
--- a/Show more
+++ b/Show more