☰

Table of Contents Everywhere

On pages which do not have a Table of Contents, but should do, create one! (I actually use this as a bookmarklet, so I can load it onto the current page only when I want it.)

目前为 2018-04-25 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name           Table of Contents Everywhere
  3. // @description    On pages which do not have a Table of Contents, but should do, create one!  (I actually use this as a bookmarklet, so I can load it onto the current page only when I want it.)
  4. // @downstreamURL  http://userscripts.org/scripts/source/123255.user.js
  5. // @license        ISC
  6. // @version        1.0.3
  7. // @include        http://*/*
  8. // @include        https://*/*
  9. // @grant          none
  10. // @namespace https://greasyfork.org/users/8615
  11. // ==/UserScript==
  12.  
  13. var minimumItems = 4;    // Don't display a TOC for fewer than this number of entries.
  14. var maximumItems = 800;  // Don't display a TOC for more than this number of entries.
  15. var delayBeforeRunning = 1600;
  16. var showAnchors = true;
  17. var pushAnchorsToBottom = true;   // They can look messy interspersed amongst TOC tree
  18.  
  19. // 2015-05-12  Improved shadow styling
  20. // 2015-01-02  Improved styling
  21. // 2012-02-19  Removed verbose log.  Added showAnchors.  Added https since everyone is forcing that now (e.g. github).
  22. // 2012-02-18  Fixed sorting of TOC elements.  Added anchor unicode.
  23. // 2012-01-30  Implemented GM_log and GM_addStyle so this script can be included on any web page.
  24.  
  25. // TODO: derbyjs.com is an example of a site with a <div id=toc> that has no
  26. // hide or close buttons.  Perhaps we should add close and rollup buttons if we
  27. // cannot find any recognisable buttons.  (Medawiki tocs for example, do have a
  28. // show/hide button, so we don't want to add to them!)
  29.  
  30. // TODO: whatwg.org presents its own TOC but with no title.  Our buttons appear in the wrong place!
  31.  
  32. // BUG: Displays links for elements which may be invisible due to CSS.  (e.g. see github markdown pages)
  33.  
  34. // TODO CONSIDER: TOC hijacking _whitelist_ to avoid creeping fixes for per-site issues.  Different problems are appearing on a small proportion of websites when we try to consume/hijack their existing TOC.  It would be better to create our own *separate* TOC as standard, and only hijack *known* friendly TOCs such as WikiMedia's / Wikia's.
  35. // (We might offer a tiny button "Try to Use Page TOC" allowing us to test hijack before adding the site to the whitelist.)
  36.  
  37. setTimeout(function(){
  38.  
  39.  
  40.  
  41. // Implementing these two means we can run as a stand-alone script on any page.
  42. if (typeof GM_log == "undefined") {
  43. 	GM_log = function() {
  44. 		// Firefox's console.log does not have apply or call functions!
  45. 		var txt = Array.prototype.join.call(arguments," ");
  46. 		console.log(txt);
  47. 	};
  48. }
  49. if (typeof GM_addStyle == "undefined") {
  50. 	this.GM_addStyle = function(css) {
  51. 		var s = document.createElement("style");
  52. 		s.type = 'text/css';
  53. 		s.innerHTML = css;
  54. 		document.getElementsByTagName("head")[0].appendChild(s);
  55. 	};
  56. }
  57.  
  58. // Implementing these allows us to remember toggled state.  (Chrome's set/getValue don't work.)
  59. if (typeof GM_setValue == 'undefined' || window.navigator.vendor.match(/Google/)) {
  60. 	GM_log("[TOCE] Adding fallback implementation of GM_set/getValue");
  61.  
  62. 	if (typeof localStorage == 'undefined') {
  63.  
  64. 		GM_getValue = function(name, defaultValue) {
  65. 			return defaultValue;
  66. 		};
  67.  
  68. 	} else {
  69.  
  70. 		GM_setValue = function(name, value) {
  71. 			value = (typeof value)[0] + value;
  72. 			localStorage.setItem(name, value);
  73. 		};
  74.  
  75. 		GM_getValue = function(name, defaultValue) {
  76. 			var value = localStorage.getItem(name);
  77. 			if (!value)
  78. 				return defaultValue;
  79. 			var type = value[0];
  80. 			value = value.substring(1);
  81. 			switch (type) {
  82. 				case 'b':
  83. 					return value == 'true';
  84. 				case 'n':
  85. 					return Number(value);
  86. 				default:
  87. 					return value;
  88. 			}
  89. 		};
  90.  
  91. 	}
  92.  
  93. }
  94.  
  95. function loadScript(url,thenCallFn) {
  96. 	GM_log("[TOCE] Loading fallback: "+url);
  97. 	var scr = document.createElement("script");
  98. 	scr.src = url;
  99. 	scr.type = "text/javascript";   // Konqueror 3.5 needs this!
  100. 	if (thenCallFn) {
  101. 		var called = false;
  102. 		function onceOnlyCallback(evt) {
  103. 			if (!called) {
  104. 				called = true;
  105. 				thenCallFn(evt);
  106. 			}
  107. 		}
  108. 		function errorCallback(evt) {
  109. 			GM_log("[TOCE] Failed to load: "+url,evt);
  110. 			onceOnlyCallback(evt);
  111. 		}
  112. 		scr.addEventListener('load',onceOnlyCallback,false);
  113. 		scr.addEventListener('error',errorCallback,false);
  114. 		// Fallback in case above events unsupported by browser (e.g. Konq 3.5)
  115. 		setTimeout(onceOnlyCallback,5000);
  116. 	}
  117. 	document.body.appendChild(scr);
  118. }
  119.  
  120. // Modified for this script's needs.
  121. // Returns e.g. "/*[2]/*[4]/*[9]"
  122. function getXPath(node) {
  123. 	var parent = node.parentNode;
  124. 	if (!parent) {
  125. 		return '';
  126. 	}
  127. 	var siblings = parent.childNodes;
  128. 	var totalCount = 0;
  129. 	var thisCount = -1;
  130. 	for (var i=0;i<siblings.length;i++) {
  131. 		var sibling = siblings[i];
  132. 		if (true /*sibling.nodeType == node.nodeType*/) {
  133. 			totalCount++;
  134. 		}
  135. 		if (sibling == node) {
  136. 			thisCount = totalCount;
  137. 			break;
  138. 		}
  139. 	}
  140. 	// return getXPath(parent) + '/*' /*node.nodeName.toLowerCase()*/ + (totalCount>1 ? '[' + thisCount + ']' : '' );
  141. 	// Remain consistent:
  142. 	return getXPath(parent) + '/*' + '[' + thisCount + ']';
  143. }
  144.  
  145. // Konqueror 3.5 lacks some things!
  146. if (!Array.prototype.map) {
  147. 	Array.prototype.map = function(fn) {
  148. 		var l = [];
  149. 		for (var i=0;i<this.length;i++) {
  150. 			l.push(fn(this[i]));
  151. 		}
  152. 		return l;
  153. 	};
  154. }
  155. if (!String.prototype.trim) {
  156. 	String.prototype.trim = function() {
  157. 		return this.replace(/^[ \t]+/,'').replace(/[ \t]+$/,'');
  158. 	};
  159. }
  160.  
  161.  
  162.  
  163. // The following block is mirrored in wikiindent.user.js
  164.  
  165. // See also: resetProps
  166. function clearStyle(elem) {
  167. 	// We set some crucial defaults, so we don't inherit CSS from the page:
  168. 	elem.style.display = 'inline';
  169. 	elem.style.position = 'static';
  170. 	elem.style.top = 'auto';
  171. 	elem.style.right = 'auto';
  172. 	elem.style.bottom = 'auto';
  173. 	elem.style.left = 'auto';
  174. 	elem.style.color = 'black';
  175. 	elem.style.backgroundColor = '#f4f4f4';
  176. 	elem.style.border = '0px solid magenta';
  177. 	elem.style.padding = '0px';
  178. 	elem.style.margin = '1px';
  179. 	return elem;
  180. }
  181.  
  182. function newNode(tag,data) {
  183. 	var elem = document.createElement(tag);
  184. 	if (data) {
  185. 		for (var prop in data) {
  186. 			elem[prop] = data[prop];
  187. 		}
  188. 	}
  189. 	return elem;
  190. }
  191.  
  192. function newSpan(text) {
  193. 	return clearStyle(newNode("span",{textContent:text}));
  194. }
  195.  
  196. function addCloseButtonTo(where, toc) {
  197. 	var closeButton = newSpan("[X]");
  198. 	// closeButton.style.float = 'right';
  199. 	// closeButton.style.cssFloat = 'right'; // Firefox
  200. 	// closeButton.style.styleFloat = 'right'; // IE7
  201. 	closeButton.style.cursor = 'pointer';
  202. 	closeButton.style.paddingLeft = '5px';
  203. 	closeButton.onclick = function() { toc.parentNode.removeChild(toc); };
  204. 	closeButton.id = "closeTOC";
  205. 	where.appendChild(closeButton);
  206. }
  207.  
  208. function addHideButtonTo(toc, tocInner) {
  209. 	var rollupButton = newSpan("[-]");
  210. 	// rollupButton.style.float = 'right';
  211. 	// rollupButton.style.cssFloat = 'right'; // Firefox
  212. 	// rollupButton.style.styleFloat = 'right'; // IE7
  213. 	rollupButton.style.cursor = 'pointer';
  214. 	rollupButton.style.paddingLeft = '10px';
  215. 	function toggleRollUp() {
  216. 		if (tocInner.style.display == 'none') {
  217. 			tocInner.style.display = '';
  218. 			rollupButton.textContent = "[-]";
  219. 		} else {
  220. 			tocInner.style.display = 'none';
  221. 			rollupButton.textContent = "[+]";
  222. 		}
  223. 		setTimeout(function(){
  224. 			GM_setValue("TOCE_rolledUp", tocInner.style.display=='none');
  225. 		},5);
  226. 	}
  227. 	rollupButton.onclick = toggleRollUp;
  228. 	rollupButton.id = "togglelink";
  229. 	toc.appendChild(rollupButton);
  230. 	if (GM_getValue("TOCE_rolledUp",false)) {
  231. 		toggleRollUp();
  232. 	}
  233. }
  234.  
  235. function addButtonsConditionally(toc) {
  236.  
  237. 	function verbosely(fn) {
  238. 		return function() {
  239. 			// GM_log("[WI] Calling: "+fn+" with ",arguments);
  240. 			return fn.apply(this,arguments);
  241. 		};
  242. 	};
  243.  
  244. 	// Provide a hide/show toggle button if the TOC does not already have one.
  245.  
  246. 	// Wikimedia's toc element is actually a table.  We must put the
  247. 	// buttons in the title div, if we can find it!
  248.  
  249. 	var tocTitle = document.getElementById("toctitle"); // Wikipedia
  250. 	tocTitle = tocTitle || toc.getElementsByTagName("h2")[0]; // Mozdev
  251. 	// tocTitle = tocTitle || toc.getElementsByTagName("div")[0]; // Fingers crossed for general
  252. 	tocTitle = tocTitle || toc.firstChild; // Fingers crossed for general
  253.  
  254. 	// Sometimes Wikimedia does not add a hide/show button (if the TOC is small).
  255. 	// We cannot test this immediately, because it gets loaded in later!
  256. 	function addButtonsNow() {
  257.  
  258. 		var hideShowButton = document.getElementById("togglelink");
  259. 		if (!hideShowButton) {
  260. 			var tocInner = toc.getElementsByTagName("ol")[0]; // Mozdev (can't get them all!)
  261. 			tocInner = tocInner || toc.getElementsByTagName("ul")[0]; // Wikipedia
  262. 			tocInner = tocInner || toc.getElementsByTagName("div")[0]; // Our own
  263. 			if (tocInner) {
  264. 				verbosely(addHideButtonTo)(tocTitle || toc, tocInner);
  265. 			}
  266. 		}
  267.  
  268. 		// We do this later, to ensure it appears on the right of
  269. 		// any existing [hide/show] button.
  270. 		if (document.getElementById("closeTOC") == null) {
  271. 			verbosely(addCloseButtonTo)(tocTitle || toc, toc);
  272. 		}
  273.  
  274. 	}
  275.  
  276. 	// Sometimes Wikimedia does not add a hide/show button (if the TOC is small).
  277. 	// We cannot test this immediately, because it gets loaded in later!
  278. 	if (document.location.href.indexOf("wiki") >= 0) {
  279. 		setTimeout(addButtonsNow,2000);
  280. 	} else {
  281. 		addButtonsNow();
  282. 	}
  283.  
  284. }
  285.  
  286. // End mirror.
  287.  
  288.  
  289.  
  290. // == Main == //
  291.  
  292. function buildTableOfContents() {
  293.  
  294. 	// Can we make a TOC?
  295. 	var headers = "//h1 | //h2 | //h3 | //h4 | //h5 | //h6 | //h7 | //h8";
  296. 	var anchors = "//a[@name]";
  297. 	// For coffeescript.org:
  298. 	var elementsMarkedAsHeader = "//*[@class='header']";
  299. 	// However on many sites that might be the thing opposite the footer, and probably not of note.
  300.  
  301. 	var xpathQuery = headers+(showAnchors?"|"+anchors:"")+"|"+elementsMarkedAsHeader;
  302. 	var nodeSnapshot = document.evaluate(xpathQuery,document,null,6,null);
  303. 	//// Chrome needs lower-case 'h', Firefox needs upper-case 'H'!
  304. 	// var nodeSnapshot = document.evaluate("//*[starts-with(name(.),'h') and substring(name(.),2) = string(number(substring(name(.),2)))]",document,null,6,null);
  305. 	// var nodeSnapshot = document.evaluate("//*[starts-with(name(.),'H') and substring(name(.),2) = string(number(substring(name(.),2)))]",document,null,6,null);
  306.  
  307. 	if (nodeSnapshot.snapshotLength > maximumItems) {
  308. 		GM_log("[TOCE] Too many nodes for table (sanity): "+nodeSnapshot.snapshotLength);
  309. 	} else if (nodeSnapshot.snapshotLength >= minimumItems) {
  310.  
  311. 		GM_log("[TOCE] Making TOC with "+nodeSnapshot.snapshotLength+" nodes.");
  312.  
  313. 		var toc = newNode("div");
  314. 		toc.id = 'toc';
  315.  
  316. 		// var heading = newSpan("Table of Contents");
  317. 		var heading = clearStyle(newNode("h2",{textContent:"Table of Contents"}));
  318. 		heading.id = 'toctitle';   // Like Wikipedia
  319. 		heading.style.fontWeight = "bold";
  320. 		heading.style.fontSize = "100%";
  321. 		toc.appendChild(heading);
  322.  
  323. 		var table = newNode("div");
  324. 		// addHideButtonTo(toc,table);
  325. 		table.id = 'toctable';   // Our own
  326. 		toc.appendChild(table);
  327.  
  328. 		// We need to do this *after* adding the table.
  329. 		addButtonsConditionally(toc);
  330.  
  331. 		// The xpath query did not return the elements in page-order.
  332. 		// We sort them back into the order they appear in the document
  333. 		// Yep it's goofy code, but it works.
  334. 		var nodeArray = [];
  335. 		for (var i=0;i<nodeSnapshot.snapshotLength;i++) {
  336. 			var node = nodeSnapshot.snapshotItem(i);
  337. 			nodeArray.push(node);
  338. 			// We need to sort numerically, since with strings "24" < "4"
  339. 			node.magicPath = getXPath(node).substring(3).slice(0,-1).split("]/*[").map(Number);
  340. 			if (pushAnchorsToBottom && node.tagName==="A") {
  341. 				node.magicPath.unshift(+Infinity);
  342. 			}
  343. 		}
  344. 		nodeArray.sort(function(a,b){
  345. 			// GM_log("[TOCE] Comparing "+a.magicPath+" against "+b.magicPath);
  346. 			for (var i=0;i<a.magicPath.length;i++) {
  347. 				if (i >= b.magicPath.length) {
  348. 					return +1; // b wins (comes earlier)
  349. 				}
  350. 				if (a.magicPath[i] > b.magicPath[i]) {
  351. 					return +1; // b wins
  352. 				}
  353. 				if (a.magicPath[i] < b.magicPath[i]) {
  354. 					return -1; // a wins
  355. 				}
  356. 			}
  357. 			return -1; // assume b is longer, or they are equal
  358. 		});
  359.  
  360. 		for (var i=0;i<nodeArray.length;i++) {
  361. 			var node = nodeArray[i];
  362.  
  363. 			var level = (node.tagName.substring(1) | 0) - 1;
  364. 			if (level < 0) {
  365. 				level = 0;
  366. 			}
  367.  
  368. 			var linkText = node.textContent && node.textContent.trim() || node.name;
  369. 			if (!linkText) {
  370. 				continue;   // skip things we cannot name
  371. 			}
  372.  
  373. 			var link = clearStyle(newNode("A"));
  374. 			if (linkText.length > 40) {
  375. 				link.title = linkText;   // Show full title on hover
  376. 				linkText = linkText.substring(0,32)+"...";
  377. 			}
  378. 			link.textContent = linkText;
  379. 			/* Dirty hack for Wikimedia: */
  380. 			if (link.textContent.substring(0,7) == "[edit] ") {
  381. 				link.textContent = link.textContent.substring(7);
  382. 			}
  383. 			if (node.tagName == "A") {
  384. 				link.href = '#'+node.name;
  385. 			} else {
  386. 				(function(node){
  387. 					link.onclick = function(evt){
  388. 						node.scrollIntoView();
  389.  
  390. 						// Optional: CSS animation
  391. 						// NOT WORKING!
  392. 						/*
  393. 						node.id = "toc_current_hilight";
  394. 						["","-moz-","-webkit-"].forEach(function(insMode){
  395. 							GM_addStyle("#toc_current_hilight { "+insMode+"animation: 'fadeHighlight 4s ease-in 1s alternate infinite'; }@"+insMode+"keyframes fadeHighlight { 0%: { background-color: yellow; } 100% { background-color: rgba(255,255,0,0); } }");
  396. 						});
  397. 						*/
  398.  
  399. 						evt.preventDefault();
  400. 						return false;
  401. 					};
  402. 				})(node);
  403. 				link.href = '#';
  404. 			}
  405. 			table.appendChild(link);
  406.  
  407. 			// For better layout, we will now replace that link with a neater li.
  408. 			liType = "li";
  409. 			if (node.tagName == "A") {
  410. 				liType = "div";
  411. 			}
  412. 			var li = newNode(liType);
  413. 			// clearStyle(li); // display:inline; is bad on LIs!
  414. 			// li.style.display = 'list-item';   // not working on Github
  415. 			link.parentNode.replaceChild(li,link);
  416. 			if (node.tagName == "A") {
  417. 				li.appendChild(document.createTextNode("\u2693 "));
  418. 			}
  419. 			li.appendChild(link);
  420. 			li.style.paddingLeft = (1.5*level)+"em";
  421. 			li.style.fontSize = (100-6*(level+1))+"%";
  422. 			li.style.size = li.style.fontSize;
  423.  
  424. 			// Debugging:
  425. 			/*
  426. 			li.title = node.tagName;
  427. 			if (node.name)
  428. 				li.title += " (#"+node.name+")";
  429. 			li.title = getXPath(node);
  430. 			*/
  431.  
  432. 		}
  433.  
  434. 		document.body.appendChild(toc);
  435.  
  436. 		// TODO scrollIntoView if newly matching 1.hash exists
  437.  
  438. 		postTOC(toc);
  439.  
  440. 	} else {
  441. 		GM_log("[TOCE] Not enough items found to create toc.");
  442. 	}
  443.  
  444. 	return toc;
  445.  
  446. }
  447.  
  448. function postTOC(toc) {
  449. 	if (toc) {
  450.  
  451. 		// We make the TOC float regardless whether we created it or it already existed.
  452. 		// Interestingly, the overflow settings seems to apply to all sub-elements.
  453. 		// E.g.: http://mewiki.project357.com/wiki/X264_Settings#Input.2FOutput
  454. 		// FIXED: Some of the sub-trees are so long that they also get scrollbars, which is a bit messy!
  455. 		// FIXED : max-width does not do what I want!  To see, find a TOC with really wide section titles (long lines).
  456.  
  457. 		// Also in Related_Links_Pager.user.js
  458. 		// See also: clearStyle
  459. 		var resetProps = " width: auto; height: auto; max-width: none; max-height: none; ";
  460.  
  461. 		if (toc.id === "") {
  462. 			toc.id = "toc";
  463. 		}
  464. 		var tocID = toc.id;
  465. 		GM_addStyle("#"+tocID+" { position: fixed; top: 10%; right: 4%; background-color: #f4f4f4; color: black; font-weight: normal; padding: 5px; border: 1px solid grey; z-index: 9999999; "+resetProps+" }" // max-height: 80%; max-width: 32%; overflow: auto; 
  466. 			+ "#"+tocID+"               { opacity: 0.4; }"
  467. 			+ "#"+tocID+":hover         { box-shadow: 0px 2px 10px 1px rgba(0,0,0,0.4); }"
  468. 			+ "#"+tocID+":hover         { -webkit-box-shadow: 0px 1px 4px 0px rgba(0,0,0,0.4); }"
  469. 			+ "#"+tocID+":hover         { opacity: 1.0; }"
  470. 			+ "#"+tocID+"       > * > * { opacity: 0.0; }"
  471. 			+ "#"+tocID+":hover > * > * { opacity: 1.0; }"
  472. 			+ "#"+tocID+" , #"+tocID+" > * > * { transition: opacity; transition-duration: 400ms; }"
  473. 			+ "#"+tocID+" , #"+tocID+" > * > * { -webkit-transition: opacity; -webkit-transition-duration: 400ms; }"
  474. 		);
  475. 		GM_addStyle("#"+tocID+" > * { "+resetProps+" }");
  476.  
  477. 		var maxWidth = window.innerWidth * 0.40 | 0;
  478. 		var maxHeight = window.innerHeight * 0.80 | 0;
  479.  
  480. 		var table = document.getElementById("toctable");
  481. 		table = table || toc.getElementsByTagName("ul")[0];   // Wikipedia
  482. 		table = table || toc;   // Give up, set for whole element
  483. 		table.style.overflow = 'auto';
  484. 		table.style.maxWidth = maxWidth+"px";
  485. 		table.style.maxHeight = maxHeight+"px";
  486.  
  487. 	}
  488. }
  489.  
  490. function searchForTOC() {
  491.  
  492. 	try {
  493.  
  494. 		var tocFound = document.getElementById("toc");
  495. 		// Konqueror 3.5 does NOT have document.getElementsByClassName(), so we check for it.
  496. 		tocFound = tocFound || (document.getElementsByClassName && document.getElementsByClassName("toc")[0]);
  497. 		tocFound = tocFound || document.getElementById("article-nav");   // developer.mozilla.org
  498. 		tocFound = tocFound || document.getElementById("page-toc");      // developer.mozilla.org
  499. 		tocFound = tocFound || (document.getElementsByClassName && document.getElementsByClassName("twikiToc")[0]);      // TWiki
  500. 		tocFound = tocFound || document.getElementById("TOC");           // meteorpedia.com
  501. 		tocFound = tocFound || document.location.host==="developer.android.com" && document.getElementById("qv");
  502. 		if (document.location.host.indexOf("dartlang.org")>=0) {
  503. 			tocFound = null;   // The toc they gives us contains top-level only.  It's preferable to generate our own full tree.
  504. 		}
  505. 		// whatwg.org:
  506. 		/* if (document.getElementsByTagName("nav").length == 1) {
  507. 			GM_log("[TOCE] Using nav element.");
  508. 			tocFound = document.getElementsByTagName("nav")[0];
  509. 		} */
  510.  
  511. 		var toc = tocFound;
  512.  
  513. 		// With the obvious exception of Wikimedia sites, most found tocs do not contain a hide/close button.
  514. 		// TODO: If we are going to make the toc float, we should give it rollup/close buttons, unless it already has them.
  515. 		// The difficulty here is: where to add the buttons in the TOC, and which part of the TOC to hide, without hiding the buttons!
  516. 		// Presumably we need to identify the title element (first with textContent) and collect everything after that into a hideable block (or hide/unhide each individually when needed).
  517.  
  518. 		if (toc) {
  519.  
  520. 			postTOC(toc);
  521.  
  522. 			addButtonsConditionally(toc);
  523.  
  524. 		} else {
  525.  
  526. 			toc = buildTableOfContents();
  527.  
  528. 		}
  529.  
  530. 	} catch (e) {
  531. 		GM_log("[TOCE] Error! "+e);
  532. 	}
  533.  
  534. }
  535.  
  536. if (document.evaluate /*this.XPathResult*/) {
  537. 	searchForTOC();
  538. } else {
  539. 	loadScript("http://hwi.ath.cx/javascript/xpath.js", searchForTOC);
  540. }
  541.  
  542.  
  543.  
  544. },delayBeforeRunning);
  545. // We want it to run fairly soon but it can be quite heavy on large pages - big XPath search.
  546.