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GitHub Toggle Issue Comments

A userscript that toggles issues/pull request comments & messages

As of 25. 03. 2017. See the latest version.

How to install

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

How to install

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!) 

  1. // ==UserScript==
  2. // @name          GitHub Toggle Issue Comments
  3. // @version       1.0.21
  4. // @description   A userscript that toggles issues/pull request comments & messages
  5. // @license       https://creativecommons.org/licenses/by-sa/4.0/
  6. // @namespace     https://github.com/Mottie
  7. // @include       https://github.com/*
  8. // @run-at        document-idle
  9. // @grant         GM_addStyle
  10. // @grant         GM_getValue
  11. // @grant         GM_setValue
  12. // @author        Rob Garrison
  13. // ==/UserScript==
  14. (() => {
  15. 	"use strict";
  16.  
  17. 	GM_addStyle(`
  18. 		.ghic-button { float:right; }
  19. 		.ghic-button .btn:hover div.select-menu-modal-holder { display:block; top:auto; bottom:25px; right:0; }
  20. 		.ghic-right { float:right; }
  21. 		/* pre-wrap set for Firefox; see https://greatest.deepsurf.us/en/forum/discussion/9166/x */
  22. 		.ghic-menu label { display:block; padding:5px 15px; white-space:pre-wrap; }
  23. 		.ghic-button .select-menu-header, .ghic-participants { cursor:default; }
  24. 		.ghic-participants { border-top:1px solid #484848; padding:15px; }
  25. 		.ghic-avatar { display:inline-block; float:left; margin: 0 2px 2px 0; cursor:pointer; position:relative; }
  26. 		.ghic-avatar:last-child { margin-bottom:5px; }
  27. 		.ghic-avatar.comments-hidden svg { display:block; position:absolute; top:-2px; left:-2px; z-index:1; }
  28. 		.ghic-avatar.comments-hidden img { opacity:0.5; }
  29. 		.ghic-button .dropdown-item span { font-weight:normal; opacity:.5; }
  30. 		.ghic-button .dropdown-item.ghic-has-content span { opacity:1; }
  31. 		.ghic-button .dropdown-item.ghic-checked span { font-weight:bold; }
  32. 		.ghic-button .dropdown-item.ghic-checked svg,
  33. 			.ghic-button .dropdown-item.ghic-checked .ghic-count { display:inline-block; }
  34. 		.ghic-button .ghic-count { float:left; margin-right:5px; }
  35. 		.ghic-button .select-menu-modal { margin:0; }
  36. 		.ghic-button .ghic-participants { margin-bottom:20px; }
  37. 		/* for testing: ".ghic-hidden { opacity: 0.3; } */
  38. 		.ghic-hidden, .ghic-hidden-participant, .ghic-avatar svg, .ghic-button .ghic-right > *,
  39. 			.ghic-hideReactions .comment-reactions { display:none; }
  40. 	`);
  41.  
  42. 	let debounce,
  43. 		busy = false,
  44. 		observers = [];
  45.  
  46. 	const regex = /(svg|path)/i,
  47. 		// ZenHub addon active (include ZenHub Enterprise)
  48. 		hasZenHub = $(".zhio, .zhe") ? true : false,
  49.  
  50. 		settings = {
  51. 			// example: https://github.com/Mottie/Keyboard/issues/448
  52. 			title: {
  53. 				isHidden: false,
  54. 				name: "ghic-title",
  55. 				selector: ".discussion-item-renamed",
  56. 				label: "Title Changes"
  57. 			},
  58. 			labels: {
  59. 				isHidden: false,
  60. 				name: "ghic-labels",
  61. 				selector: ".discussion-item-labeled, .discussion-item-unlabeled",
  62. 				label: "Label Changes"
  63. 			},
  64. 			state: {
  65. 				isHidden: false,
  66. 				name: "ghic-state",
  67. 				selector: ".discussion-item-reopened, .discussion-item-closed",
  68. 				label: "State Changes (close/reopen)"
  69. 			},
  70.  
  71. 			// example: https://github.com/jquery/jquery/issues/2986
  72. 			milestone: {
  73. 				isHidden: false,
  74. 				name: "ghic-milestone",
  75. 				selector: ".discussion-item-milestoned",
  76. 				label: "Milestone Changes"
  77. 			},
  78. 			refs: {
  79. 				isHidden: false,
  80. 				name: "ghic-refs",
  81. 				selector: ".discussion-item-ref, .discussion-item-head_ref_deleted",
  82. 				label: "References"
  83. 			},
  84. 			assigned: {
  85. 				isHidden: false,
  86. 				name: "ghic-assigned",
  87. 				selector: ".discussion-item-assigned",
  88. 				label: "Assignment Changes"
  89. 			},
  90.  
  91. 			// Pull Requests
  92. 			commits: {
  93. 				isHidden: false,
  94. 				name: "ghic-commits",
  95. 				selector: ".discussion-commits",
  96. 				label: "Commits"
  97. 			},
  98. 			// example: https://github.com/jquery/jquery/pull/3014
  99. 			diffOld: {
  100. 				isHidden: false,
  101. 				name: "ghic-diffOld",
  102. 				selector: ".outdated-diff-comment-container",
  103. 				label: "Diff (outdated) Comments"
  104. 			},
  105. 			diffNew: {
  106. 				isHidden: false,
  107. 				name: "ghic-diffNew",
  108. 				selector: "[id^=diff-for-comment-]:not(.outdated-diff-comment-container)",
  109. 				label: "Diff (current) Comments"
  110. 			},
  111. 			// example: https://github.com/jquery/jquery/pull/2949
  112. 			merged: {
  113. 				isHidden: false,
  114. 				name: "ghic-merged",
  115. 				selector: ".discussion-item-merged",
  116. 				label: "Merged"
  117. 			},
  118. 			integrate: {
  119. 				isHidden: false,
  120. 				name: "ghic-integrate",
  121. 				selector: ".discussion-item-integrations-callout",
  122. 				label: "Integrations"
  123. 			},
  124.  
  125. 			// extras (special treatment - no selector)
  126. 			plus1: {
  127. 				isHidden: false,
  128. 				name: "ghic-plus1",
  129. 				label: "Hide +1s"
  130. 			},
  131. 			reactions: {
  132. 				isHidden: false,
  133. 				name: "ghic-reactions",
  134. 				label: "Reactions"
  135. 			},
  136. 			// page with lots of users to hide:
  137. 			// https://github.com/isaacs/github/issues/215
  138.  
  139. 			// ZenHub pipeline change
  140. 			pipeline: {
  141. 				isHidden: false,
  142. 				name: "ghic-pipeline",
  143. 				selector: ".discussion-item.zh-discussion-item",
  144. 				label: "ZenHub Pipeline Changes"
  145. 			}
  146. 		};
  147.  
  148. 	const iconHidden = `<svg class="octicon" xmlns="http://www.w3.org/2000/svg" width="30" height="30" viewBox="0 0 9 9"><path fill="#777" d="M7.07 4.5c0-.47-.12-.9-.35-1.3L3.2 6.7c.4.25.84.37 1.3.37.35 0 .68-.07 1-.2.32-.14.6-.32.82-.55.23-.23.4-.5.55-.82.13-.32.2-.65.2-1zM2.3 5.8l3.5-3.52c-.4-.23-.83-.35-1.3-.35-.35 0-.68.07-1 .2-.3.14-.6.32-.82.55-.23.23-.4.5-.55.82-.13.32-.2.65-.2 1 0 .47.12.9.36 1.3zm6.06-1.3c0 .7-.17 1.34-.52 1.94-.34.6-.8 1.05-1.4 1.4-.6.34-1.24.52-1.94.52s-1.34-.18-1.94-.52c-.6-.35-1.05-.8-1.4-1.4C.82 5.84.64 5.2.64 4.5s.18-1.35.52-1.94.8-1.06 1.4-1.4S3.8.64 4.5.64s1.35.17 1.94.52 1.06.8 1.4 1.4c.35.6.52 1.24.52 1.94z"/></svg>`,
  149. 		iconCheck = `<svg class="octicon octicon-check" height="16" viewBox="0 0 12 16" width="12"><path d="M12 5L4 13 0 9l1.5-1.5 2.5 2.5 6.5-6.5 1.5 1.5z"></path></svg>`,
  150. 		plus1Icon = `<img src="https://assets-cdn.github.com/images/icons/emoji/unicode/1f44d.png" class="emoji" title=":+1:" alt=":+1:" height="20" width="20" align="absmiddle">`;
  151.  
  152. 	function addMenu() {
  153. 		busy = true;
  154. 		if ($("#discussion_bucket") && !$(".ghic-button")) {
  155. 			addObservers();
  156. 			// update "isHidden" values
  157. 			getSettings();
  158. 			let name, bright, isHidden, isChecked,
  159. 				list = "",
  160. 				keys = Object.keys(settings),
  161. 				header = $(".discussion-sidebar-item:last-child"),
  162. 				menu = document.createElement("div");
  163.  
  164. 			for (name of keys) {
  165. 				if (!(name === "pipeline" && !hasZenHub)) {
  166. 					// make plus1 and reactions list items always bright
  167. 					bright = name === "plus1" ? " ghic-has-content" : "";
  168. 					isHidden = settings[name].isHidden;
  169. 					isChecked = isHidden ? " ghic-checked": "";
  170. 					// not using multi-line backticks because it adds lots of white-space to the label
  171. 					list += `<label class="dropdown-item${bright}${isChecked}">` +
  172. 						`<span>${settings[name].label}</span>` +
  173. 						`<span class="ghic-right ${settings[name].name}">` +
  174. 							`<input type="checkbox"${isHidden ? " checked" : ""}>` +
  175. 							`${iconCheck}<span class="ghic-count"> </span>` +
  176. 						`</span></label>`;
  177. 				}
  178. 			}
  179.  
  180. 			menu.className = "ghic-button";
  181. 			menu.innerHTML = `
  182. 				<span class="btn btn-sm" role="button" tabindex="0" aria-haspopup="true">
  183. 					<span class="tooltipped tooltipped-w" aria-label="Toggle issue comments">
  184. 						<svg class="octicon octicon-comment-discussion" height="16" width="16" role="img" viewBox="0 0 16 16">
  185. 							<path d="M15 2H6c-0.55 0-1 0.45-1 1v2H1c-0.55 0-1 0.45-1 1v6c0 0.55 0.45 1 1 1h1v3l3-3h4c0.55 0 1-0.45 1-1V10h1l3 3V10h1c0.55 0 1-0.45 1-1V3c0-0.55-0.45-1-1-1zM9 12H4.5l-1.5 1.5v-1.5H1V6h4v3c0 0.55 0.45 1 1 1h3v2z m6-3H13v1.5l-1.5-1.5H6V3h9v6z"></path>
  186. 						</svg>
  187. 					</span>
  188. 					<div class="select-menu-modal-holder">
  189. 						<div class="select-menu-modal" aria-hidden="true">
  190. 							<div class="select-menu-header" tabindex="-1">
  191. 								<span class="select-menu-title">Toggle items</span>
  192. 							</div>
  193. 							<div class="select-menu-list ghic-menu" role="menu">
  194. 								${list}
  195. 								<div class="ghic-participants"></div>
  196. 							</div>
  197. 						</div>
  198. 					</div>
  199. 				</span>
  200. 			`;
  201. 			if (hasZenHub) {
  202. 				header.insertBefore(menu, header.childNodes[0]);
  203. 			} else {
  204. 				header.appendChild(menu);
  205. 			}
  206. 			addAvatars();
  207. 		}
  208. 		update();
  209. 		busy = false;
  210. 	}
  211.  
  212. 	function addAvatars() {
  213. 		let indx = 0,
  214.  
  215. 			str = "<h3>Hide Comments from</h3>",
  216. 			unique = [],
  217. 			// get all avatars
  218. 			avatars = $$(".timeline-comment-avatar"),
  219. 			len = avatars.length - 1, // last avatar is the new comment with the current user
  220.  
  221. 			loop = (callback) => {
  222. 				let el, name,
  223. 					max = 0;
  224. 				while (max < 50 && indx < len) {
  225. 					if (indx >= len) {
  226. 						return callback();
  227. 					}
  228. 					el = avatars[indx];
  229. 					name = (el.getAttribute("alt") || "").replace("@", "");
  230. 					if (unique.indexOf(name) < 0) {
  231. 						str += `<span class="ghic-avatar tooltipped tooltipped-n" aria-label="${name}">
  232. 								${iconHidden}
  233. 								<img class="ghic-avatar avatar" width="24" height="24" src="${el.src}"/>
  234. 							</span>`;
  235. 						unique[unique.length] = name;
  236. 						max++;
  237. 					}
  238. 					indx++;
  239. 				}
  240. 				if (indx < len) {
  241. 					setTimeout(() => {
  242. 						loop(callback);
  243. 					}, 200);
  244. 				} else {
  245. 					callback();
  246. 				}
  247. 			};
  248. 		loop(() => {
  249. 			$(".ghic-participants").innerHTML = str;
  250. 		});
  251. 	}
  252.  
  253. 	function getSettings() {
  254. 		let name,
  255. 			keys = Object.keys(settings);
  256. 		for (name of keys) {
  257. 			settings[name].isHidden = GM_getValue(settings[name].name, false);
  258. 		}
  259. 	}
  260.  
  261. 	function saveSettings() {
  262. 		let name,
  263. 			keys = Object.keys(settings);
  264. 		for (name of keys) {
  265. 			GM_setValue(settings[name].name, settings[name].isHidden);
  266. 		}
  267. 	}
  268.  
  269. 	function getInputValues() {
  270. 		let name, item,
  271. 			keys = Object.keys(settings),
  272. 			menu = $(".ghic-menu");
  273. 		for (name of keys) {
  274. 			if (!(name === "pipeline" && !hasZenHub)) {
  275. 				item = closest(".dropdown-item", $("." + settings[name].name, menu));
  276. 				settings[name].isHidden = $("input", item).checked;
  277. 				toggleClass(item, "ghic-checked", settings[name].isHidden);
  278. 			}
  279. 		}
  280. 	}
  281.  
  282. 	function hideStuff(name, init) {
  283. 		let count, results,
  284. 			obj = settings[name],
  285. 			isHidden = obj.isHidden,
  286. 			item = closest(".dropdown-item", $(".ghic-menu ." + obj.name));
  287. 		if (obj.selector) {
  288. 			results = $$(obj.selector);
  289. 			toggleClass(item, "ghic-checked", isHidden);
  290. 			if (isHidden) {
  291. 				count = addClass(results, "ghic-hidden");
  292. 				$(".ghic-count", item).textContent = count ? "(" + count + ")" : " ";
  293. 			} else if (!init) {
  294. 				// no need to remove classes on initialization
  295. 				removeClass(results, "ghic-hidden");
  296. 			}
  297. 			toggleClass(item, "ghic-has-content", results.length);
  298. 		} else if (name === "plus1") {
  299. 			hidePlus1(init);
  300. 		} else if (name === "reactions") {
  301. 			toggleClass($("body"), "ghic-hideReactions", isHidden);
  302. 			toggleClass(item, "ghic-has-content", $$(".has-reactions").length - 1);
  303. 			// make first comment reactions visible
  304. 			item = $(".has-reactions", $(".timeline-comment-wrapper"));
  305. 			if (item) {
  306. 				item.style.display = "block";
  307. 			}
  308. 		}
  309. 	}
  310.  
  311. 	function hidePlus1(init) {
  312. 		if (init && !settings.plus1.isHidden) {
  313. 			return;
  314. 		}
  315. 		let max,
  316. 			indx = 0,
  317. 			count = 0,
  318. 			total = 0,
  319. 			// keep a list of post authors to prevent duplicate +1 counts
  320. 			authors = [],
  321. 			// used https://github.com/isaacs/github/issues/215 for matches here...
  322. 			// matches "+1!!!!", "++1", "+!", "+99!!!", "-1", "+ 100", "thumbs up"; ":+1:^21425235"
  323. 			// ignoring -1's... add unicode for thumbs up; it gets replaced with an image in Windows
  324. 			regexPlus = /([?!,.:^[\]()\'\"+-\d]|bump|thumbs|up|\ud83d\udc4d)/gi,
  325. 			// other comments to hide - they are still counted towards the +1 counter (for now?)
  326. 			// seen "^^^" to bump posts; "bump plleeaaassee"; "eta?"; "pretty please"
  327. 			// "need this"; "right now"; "still nothing?"; "super helpful"; "for gods sake"
  328. 			regexHide = new RegExp("(" + [
  329. 				"@\\w+",
  330. 				"pretty",
  331. 				"pl+e+a+s+e+",
  332. 				"y+e+s+",
  333. 				"eta",
  334. 				"much",
  335. 				"need(ed)?",
  336. 				"fix",
  337. 				"this",
  338. 				"right",
  339. 				"now",
  340. 				"still",
  341. 				"nothing",
  342. 				"super",
  343. 				"helpful",
  344. 				"for\\sgods\\ssake",
  345. 				"c'?mon",
  346. 				"come\\son"
  347. 			].join("|") + ")", "gi"),
  348. 			// image title ":{anything}:", etc.
  349. 			regexEmoji = /:(.*):/,
  350.  
  351. 			comments = $$(".js-discussion .timeline-comment-wrapper"),
  352. 			len = comments.length,
  353.  
  354. 			loop = () => {
  355. 				let wrapper, el, tmp, txt, img, hasLink, dupe;
  356. 				max = 0;
  357. 				while (max < 20 && indx < len) {
  358. 					if (indx >= len) {
  359. 						return;
  360. 					}
  361. 					wrapper = comments[indx];
  362. 					// save author list to prevent repeat +1s
  363. 					el = $(".timeline-comment-header .author", wrapper);
  364. 					txt = (el ? el.textContent || "" : "").toLowerCase();
  365. 					dupe = true;
  366. 					if (txt && authors.indexOf(txt) < 0) {
  367. 						authors[authors.length] = txt;
  368. 						dupe = false;
  369. 					}
  370. 					el = $(".comment-body", wrapper);
  371. 					// ignore quoted messages, but get all fragments
  372. 					tmp = $$(".email-fragment", el);
  373. 					// some posts only contain a link to related issues; these should not be counted as a +1
  374. 					// see https://github.com/isaacs/github/issues/618#issuecomment-200869630
  375. 					hasLink = $$(tmp.length ? ".email-fragment .issue-link" : ".issue-link", el).length;
  376. 					if (tmp.length) {
  377. 						// ignore quoted messages
  378. 						txt = getAllText(tmp);
  379. 					} else {
  380. 						txt = el.textContent.trim();
  381. 					}
  382. 					if (!txt) {
  383. 						img = $("img", el);
  384. 						if (img) {
  385. 							txt = img.getAttribute("title") || img.getAttribute("alt");
  386. 						}
  387. 					}
  388. 					// remove fluff
  389. 					txt = txt.replace(regexEmoji, "").replace(regexPlus, "").replace(regexHide, "").trim();
  390. 					if (txt === "" || (txt.length < 4 && !hasLink)) {
  391. 						if (settings.plus1.isHidden) {
  392. 							wrapper.classList.add("ghic-hidden");
  393. 							total++;
  394. 							// one +1 per author
  395. 							if (!dupe) {
  396. 								count++;
  397. 							}
  398. 						} else if (!init) {
  399. 							wrapper.classList.remove("ghic-hidden");
  400. 						}
  401. 						max++;
  402. 					}
  403. 					indx++;
  404. 				}
  405. 				if (indx < len) {
  406. 					setTimeout(() => {
  407. 						loop();
  408. 					}, 200);
  409. 				} else {
  410. 					$(".ghic-menu .ghic-plus1 .ghic-count").textContent = total ? "(" + total + ")" : " ";
  411. 					toggleClass($(".ghic-menu ." + settings.plus1.name), "ghic-has-content", total);
  412. 					addCountToReaction(count);
  413. 				}
  414. 			};
  415. 		loop();
  416. 	}
  417.  
  418. 	function getAllText(el) {
  419. 		let txt = "",
  420. 			indx = el.length;
  421. 		// text order doesn't matter
  422. 		while (indx--) {
  423. 			txt += el[indx].textContent.trim();
  424. 		}
  425. 		return txt;
  426. 	}
  427.  
  428. 	function addCountToReaction(count) {
  429. 		if (!count) {
  430. 			count = ($(".ghic-menu .ghic-plus1 .ghic-count").textContent || "")
  431. 				.replace(/[()]/g, "")
  432. 				.trim();
  433. 		}
  434. 		let comment = $(".timeline-comment"),
  435. 			tmp = $(
  436. 				".has-reactions button[value='+1 react'], .has-reactions button[value='+1 unreact']",
  437. 				comment
  438. 			),
  439. 			el = $(".ghic-count", comment);
  440. 		if (el) {
  441. 			// the count may have been appended to the comment & now
  442. 			// there is a reaction, so remove any "ghic-count" elements
  443. 			el.parentNode.removeChild(el);
  444. 		}
  445. 		if (count) {
  446. 			if (tmp) {
  447. 				el = document.createElement("span");
  448. 				el.className = "ghic-count";
  449. 				el.textContent = count ? " + " + count + " (from hidden comments)" : "";
  450. 				tmp.appendChild(el);
  451. 			} else {
  452. 				el = document.createElement("p");
  453. 				el.className = "ghic-count";
  454. 				el.innerHTML = "<hr>" + plus1Icon + " " + count + " (from hidden comments)";
  455. 				$(".comment-body", comment).appendChild(el);
  456. 			}
  457. 		}
  458. 	}
  459.  
  460. 	function hideParticipant(el) {
  461. 		let els, indx, len, name,
  462. 			results = [];
  463. 		if (el) {
  464. 			el.classList.toggle("comments-hidden");
  465. 			hide = el.classList.contains("comments-hidden");
  466. 			name = el.getAttribute("aria-label");
  467. 			els = $$(".js-discussion .author");
  468. 			len = els.length;
  469. 			for (indx = 0; indx < len; indx++) {
  470. 				if (els[indx].textContent.trim() === name) {
  471. 					results[results.length] = closest(
  472. 						".timeline-comment-wrapper, .commit-comment, .discussion-item",
  473. 						els[indx]
  474. 					);
  475. 				}
  476. 			}
  477. 			// use a different participant class name to hide timeline events
  478. 			// or unselecting all users will show everything
  479. 			if (el.classList.contains("comments-hidden")) {
  480. 				addClass(results, "ghic-hidden-participant");
  481. 			} else {
  482. 				removeClass(results, "ghic-hidden-participant");
  483. 			}
  484. 			results = [];
  485. 		}
  486. 	}
  487.  
  488. 	function update() {
  489. 		busy = true;
  490. 		if ($("#discussion_bucket") && $(".ghic-button")) {
  491. 			let keys = Object.keys(settings),
  492. 				indx = keys.length;
  493. 			while (indx--) {
  494. 				// true flag for init - no need to remove classes
  495. 				hideStuff(keys[indx], true);
  496. 			}
  497. 		}
  498. 		busy = false;
  499. 	}
  500.  
  501. 	function checkItem(event) {
  502. 		busy = true;
  503. 		if (document.getElementById("discussion_bucket")) {
  504. 			let name,
  505. 				target = event.target,
  506. 				wrap = target && target.parentNode;
  507. 			if (target && wrap) {
  508. 				if (target.nodeName === "INPUT" && wrap.classList.contains("ghic-right")) {
  509. 					getInputValues();
  510. 					saveSettings();
  511. 					// extract ghic-{name}, because it matches the name in settings
  512. 					name = wrap.className.replace("ghic-right", "").replace("ghic-has-content", "").trim();
  513. 					if (wrap.classList.contains(name)) {
  514. 						hideStuff(name.replace("ghic-", ""));
  515. 					}
  516. 				} else if (target.classList.contains("ghic-avatar")) {
  517. 					// make sure we're targeting the span wrapping the image
  518. 					hideParticipant(target.nodeName === "IMG" ? target.parentNode : target);
  519. 				} else if (regex.test(target.nodeName)) {
  520. 					// clicking on the SVG may target the svg or path inside
  521. 					hideParticipant(closest(".ghic-avatar", target));
  522. 				}
  523. 			}
  524. 		}
  525. 		busy = false;
  526. 	}
  527.  
  528. 	function removeObservers() {
  529. 		observers.forEach(observer => {
  530. 			if (observer) {
  531. 				observer.disconnect();
  532. 			}
  533. 		});
  534. 		observers = [];
  535. 	}
  536.  
  537. 	function addObservers() {
  538. 		// DOM targets - to detect GitHub dynamic ajax page loading
  539. 		// Observe progressively loaded content
  540. 		$$(".js-discussion").forEach(target => {
  541. 			const obsrvr = new MutationObserver(mutations => {
  542. 				mutations.forEach(mutation => {
  543. 					// preform checks before adding code wrap to minimize function calls
  544. 					const tar = mutation.target;
  545. 					if (!busy && tar === target) {
  546. 						clearTimeout(debounce);
  547. 						debounce = setTimeout(() => {
  548. 							update();
  549. 						}, 500);
  550. 					}
  551. 				});
  552. 			});
  553. 			obsrvr.observe(target, {
  554. 				childList: true,
  555. 				subtree: true
  556. 			});
  557. 			observers.push(obsrvr);
  558. 		});
  559. 	}
  560.  
  561. 	function $(selector, el) {
  562. 		return (el || document).querySelector(selector);
  563. 	}
  564.  
  565. 	function $$(selector, el) {
  566. 		return Array.from((el || document).querySelectorAll(selector));
  567. 	}
  568.  
  569. 	function closest(selector, el) {
  570. 		while (el && el.nodeType === 1) {
  571. 			if (el.matches(selector)) {
  572. 				return el;
  573. 			}
  574. 			el = el.parentNode;
  575. 		}
  576. 		return null;
  577. 	}
  578.  
  579. 	function addClass(els, name) {
  580. 		let indx,
  581. 			len = els.length;
  582. 		for (indx = 0; indx < len; indx++) {
  583. 			els[indx].classList.add(name);
  584. 		}
  585. 		return len;
  586. 	}
  587.  
  588. 	function removeClass(els, name) {
  589. 		let indx,
  590. 			len = els.length;
  591. 		for (indx = 0; indx < len; indx++) {
  592. 			els[indx].classList.remove(name);
  593. 		}
  594. 	}
  595.  
  596. 	function toggleClass(els, name, flag) {
  597. 		els = Array.isArray(els) ? els : [els];
  598. 		let el,
  599. 			indx = els.length;
  600. 		while (indx--) {
  601. 			el = els[indx];
  602. 			if (el) {
  603. 				if (typeof flag === "undefined") {
  604. 					flag = !el.classList.contains(name);
  605. 				}
  606. 				if (flag) {
  607. 					el.classList.add(name);
  608. 				} else {
  609. 					el.classList.remove(name);
  610. 				}
  611. 			}
  612. 		}
  613. 	}
  614.  
  615. 	function init() {
  616. 		busy = true;
  617. 		removeObservers();
  618. 		getSettings();
  619. 		addMenu();
  620. 		$("body").addEventListener("input", checkItem);
  621. 		$("body").addEventListener("click", checkItem);
  622. 		update();
  623. 		busy = false;
  624. 	}
  625.  
  626. 	// update TOC when content changes
  627. 	document.addEventListener("pjax:end", addMenu);
  628. 	init();
  629.  
  630. })();