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GitHub Custom Hotkeys

A userscript that allows you to add custom GitHub keyboard hotkeys

当前为 2020-03-29 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        GitHub Custom Hotkeys
  3. // @version     1.0.26
  4. // @description A userscript that allows you to add custom GitHub keyboard hotkeys
  5. // @license     MIT
  6. // @author      Rob Garrison
  7. // @namespace   https://github.com/Mottie
  8. // @include     https://github.com/*
  9. // @include     https://*.github.com/*
  10. // @run-at      document-idle
  11. // @grant       GM_addStyle
  12. // @grant       GM_getValue
  13. // @grant       GM_setValue
  14. // @icon        https://github.githubassets.com/pinned-octocat.svg
  15. // ==/UserScript==
  16. (() => {
  17. 	"use strict";
  18. 	/* "g p" here overrides the GitHub default "g p" which takes you to the Pull Requests page
  19. 	{
  20. 		"all": [
  21. 			{ "f1" : "#hotkey-settings" },
  22. 			{ "g g": "{repo}/graphs/code-frequency" },
  23. 			{ "g p": "{repo}/pulse" },
  24. 			{ "g u": "{user}" },
  25. 			{ "g s": "{upstream}" }
  26. 		],
  27. 		"{repo}/issues": [
  28. 			{ "g right": "{issue+1}" },
  29. 			{ "g left" : "{issue-1}" }
  30. 		],
  31. 		"{root}/search": [
  32. 			{ "g right": "{page+1}" },
  33. 			{ "g left" : "{page-1}" }
  34. 		]
  35. 	}
  36. 	*/
  37. 	let data = GM_getValue("github-hotkeys", {
  38. 			all: [{
  39. 				f1: "#hotkey-settings"
  40. 			}]
  41. 		}),
  42. 		lastHref = window.location.href;
  43.  
  44. 	const openHash = "#hotkey-settings",
  45.  
  46. 		templates = {
  47. 			remove: "<svg class='ghch-remove octicon' fill='currentColor' xmlns='http://www.w3.org/2000/svg' width='9' height='9' viewBox='0 0 9 9'><path d='M9 1L5.4 4.4 9 8 8 9 4.6 5.4 1 9 0 8l3.6-3.5L0 1l1-1 3.5 3.6L8 0l1 1z'/></svg>",
  48. 			hotkey: "Hotkey: <input type='text' class='ghch-hotkey form-control'>&nbsp; URL: <input type='text' class='ghch-url form-control'>",
  49. 			scope: "<ul><li class='ghch-hotkey-add'>+ Click to add a new hotkey</li></ul>"
  50. 		},
  51.  
  52. 		// https://github.com/{nonUser}
  53. 		// see https://github.com/Mottie/github-reserved-names
  54. 		nonUser = new RegExp("^(" + [
  55. 			/* BUILD:RESERVED-NAMES-START (v1.1.8) */
  56. 			"400", "401", "402", "403", "404", "405", "406", "407", "408", "409", 
  57. 			"410", "411", "412", "413", "414", "415", "416", "417", "418", "419", 
  58. 			"420", "421", "422", "423", "424", "425", "426", "427", "428", "429", 
  59. 			"430", "431", "500", "501", "502", "503", "504", "505", "506", "507", 
  60. 			"508", "509", "510", "511", "about", "access", "account", "admin", 
  61. 			"anonymous", "any", "api", "apps", "attributes", "auth", "billing", 
  62. 			"blob", "blog", "bounty", "branches", "business", "businesses", "c", 
  63. 			"cache", "case-studies", "categories", "central", "certification", 
  64. 			"changelog", "cla", "cloud", "codereview", "collection", 
  65. 			"collections", "comments", "commit", "commits", "community", 
  66. 			"companies", "compare", "contact", "contributing", "cookbook", 
  67. 			"coupons", "customer", "customers", "dashboard", "dashboards", 
  68. 			"design", "develop", "developer", "diff", "discover", "discussions", 
  69. 			"docs", "downloads", "downtime", "editor", "editors", "edu", 
  70. 			"enterprise", "events", "explore", "featured", "features", "files", 
  71. 			"fixtures", "forked", "garage", "ghost", "gist", "gists", "graphs", 
  72. 			"guide", "guides", "help", "help-wanted", "home", "hooks", "hosting", 
  73. 			"hovercards", "identity", "images", "inbox", "individual", "info", 
  74. 			"integration", "interfaces", "introduction", "invalid-email-address", 
  75. 			"investors", "issues", "jobs", "join", "journal", "journals", "lab", 
  76. 			"labs", "languages", "launch", "layouts", "learn", "legal", "library", 
  77. 			"linux", "listings", "lists", "login", "logos", "logout", "mac", 
  78. 			"maintenance", "malware", "man", "marketplace", "mention", 
  79. 			"mentioned", "mentioning", "mentions", "migrating", "milestones", 
  80. 			"mine", "mirrors", "mobile", "navigation", "network", "new", "news", 
  81. 			"none", "nonprofit", "nonprofits", "notices", "notifications", 
  82. 			"oauth", "offer", "open-source", "organisations", "organizations", 
  83. 			"orgs", "pages", "partners", "payments", "personal", "plans", 
  84. 			"plugins", "popular", "popularity", "posts", "press", "pricing", 
  85. 			"professional", "projects", "pulls", "raw", "readme", 
  86. 			"recommendations", "redeem", "releases", "render", "reply", 
  87. 			"repositories", "resources", "restore", "revert", 
  88. 			"save-net-neutrality", "saved", "scraping", "search", "security", 
  89. 			"services", "sessions", "settings", "shareholders", "shop", 
  90. 			"showcases", "signin", "signup", "site", "spam", "sponsors", "ssh", 
  91. 			"staff", "starred", "stars", "static", "status", "statuses", 
  92. 			"storage", "store", "stories", "styleguide", "subscriptions", 
  93. 			"suggest", "suggestion", "suggestions", "support", "suspended", 
  94. 			"talks", "teach", "teacher", "teachers", "teaching", "teams", "ten", 
  95. 			"terms", "timeline", "topic", "topics", "tos", "tour", "train", 
  96. 			"training", "translations", "tree", "trending", "updates", "username", 
  97. 			"users", "visualization", "w", "watching", "wiki", "windows", 
  98. 			"works-with", "www0", "www1", "www2", "www3", "www4", "www5", "www6", 
  99. 			"www7", "www8", "www9"
  100. 			/* BUILD:RESERVED-NAMES-END */
  101. 		].join("|") + ")$");
  102.  
  103. 	function getUrlParts() {
  104. 		const loc = window.location,
  105. 			root = "https://github.com",
  106. 			parts = {
  107. 				root,
  108. 				origin: loc.origin,
  109. 				page: ""
  110. 			};
  111. 		// me
  112. 		let tmp = $("meta[name='user-login']");
  113. 		parts.m = tmp && tmp.getAttribute("content") || "";
  114. 		parts.me = parts.m ? parts.root + "/" + parts.m : "";
  115.  
  116. 		// pathname "should" always start with a "/"
  117. 		tmp = loc.pathname.split("/");
  118.  
  119. 		// user name
  120. 		if (nonUser.test(tmp[1] || "")) {
  121. 			// invalid user! clear out the values
  122. 			tmp = [];
  123. 		}
  124. 		parts.u = tmp[1] || "";
  125. 		parts.user = tmp[1] ? root + "/" + tmp[1] : "";
  126. 		// repo name
  127. 		parts.r = tmp[2] || "";
  128. 		parts.repo = tmp[1] && tmp[2] ? parts.user + "/" + tmp[2] : "";
  129. 		// tab?
  130. 		parts.t = tmp[3] || "";
  131. 		parts.tab = tmp[3] ? parts.repo + "/" + tmp[3] : "";
  132. 		if (parts.t === "issues" || parts.t === "pulls") {
  133. 			// issue number
  134. 			parts.issue = tmp[4] || "";
  135. 		}
  136. 		// branch/tag?
  137. 		if (parts.t === "tree" || parts.t === "blob") {
  138. 			parts.branch = tmp[4] || "";
  139. 		} else if (parts.t === "releases" && tmp[4] === "tag") {
  140. 			parts.branch = tmp[5] || "";
  141. 		}
  142. 		// commit hash?
  143. 		if (parts.t === "commit") {
  144. 			parts.commit = tmp[4] || "";
  145. 		}
  146. 		// forked from
  147. 		tmp = $(".repohead .fork-flag a");
  148. 		parts.upstream = tmp ? tmp.getAttribute("href") : "";
  149. 		// current page
  150. 		tmp = loc.search.match(/[&?]p(?:age)?=(\d+)/);
  151. 		parts.page = tmp ? tmp[1] || "1" : "";
  152. 		return parts;
  153. 	}
  154.  
  155. 	// pass true to initialize; false to remove everything
  156. 	function checkScope() {
  157. 		removeElms($("body"), ".ghch-link");
  158. 		const parts = getUrlParts();
  159. 		Object.keys(data).forEach(key => {
  160. 			const url = fixUrl(parts, key === "all" ? "{root}" : key);
  161. 			if (window.location.href.indexOf(url) > -1) {
  162. 				debug("Checking custom hotkeys for " + key);
  163. 				addHotkeys(parts, url, data[key]);
  164. 			}
  165. 		});
  166. 	}
  167.  
  168. 	function fixUrl(parts, url) {
  169. 		let valid = true; // use true in case a full URL is used
  170. 		url = url
  171. 			// allow {issues+#} to go inc or desc
  172. 			.replace(/\{issue([\-+]\d+)?\}/, (s, n) => {
  173. 				const val = n ? parseInt(parts.issue || "", 10) + parseInt(n, 10) : "";
  174. 				valid = val !== "" && val > 0;
  175. 				return valid ? parts.tab + "/" + val : "";
  176. 			})
  177. 			// allow {page+#} to change results page
  178. 			.replace(/\{page([\-+]\d+)?\}/, (s, n) => {
  179. 				const loc = window.location,
  180. 					val = n ? parseInt(parts.page || "", 10) + parseInt(n, 10) : "";
  181. 				let search;
  182. 				valid = val !== "" && val > 0;
  183. 				if (valid) {
  184. 					search = loc.origin + loc.pathname;
  185. 					if (loc.search.match(/[&?]p?=\d+/)) {
  186. 						search += loc.search.replace(/([&?]p=)\d+/, (s, n) => {
  187. 							return n + val;
  188. 						});
  189. 					} else {
  190. 						// started on page 1 (no &p=1) available to replace
  191. 						search += loc.search + "&p=" + val;
  192. 					}
  193. 				}
  194. 				return valid ? search : "";
  195. 			})
  196. 			// replace placeholders
  197. 			.replace(/\{\w+\}/gi, matches => {
  198. 				const val = parts[matches.replace(/[{}]/g, "")] || "";
  199. 				valid = val !== "";
  200. 				return val;
  201. 			});
  202. 		return valid ? url : "";
  203. 	}
  204.  
  205. 	function removeElms(src, selector) {
  206. 		const links = $$(selector, src);
  207. 		let len = links.length;
  208. 		while (len--) {
  209. 			src.removeChild(links[len]);
  210. 		}
  211. 	}
  212.  
  213. 	function addHotkeys(parts, scope, hotkeys) {
  214. 		// Shhh, don't tell anyone, but GitHub checks the data-hotkey attribute
  215. 		// of any link on the page, so we only need to add dummy links :P
  216. 		let indx, url, key, link;
  217. 		const len = hotkeys.length,
  218. 			body = $("body");
  219. 		for (indx = 0; indx < len; indx++) {
  220. 			key = Object.keys(hotkeys[indx])[0];
  221. 			url = fixUrl(parts, hotkeys[indx][key]);
  222. 			if (url) {
  223. 				link = document.createElement("a");
  224. 				link.className = "ghch-link";
  225. 				link.href = url;
  226. 				link.setAttribute("data-hotkey", key);
  227. 				body.appendChild(link);
  228. 				debug("Adding '" + key + "' keyboard hotkey linked to: " + url);
  229. 			}
  230. 		}
  231. 	}
  232.  
  233. 	function addHotkey(el) {
  234. 		const li = document.createElement("li");
  235. 		li.className = "ghch-hotkey-set";
  236. 		li.innerHTML = templates.hotkey + templates.remove;
  237. 		el.parentNode.insertBefore(li, el);
  238. 		return li;
  239. 	}
  240.  
  241. 	function addScope(el) {
  242. 		const scope = document.createElement("fieldset");
  243. 		scope.className = "ghch-scope-custom";
  244. 		scope.innerHTML = `
  245. 			<legend>
  246. 				<span class="simple-box" contenteditable>Enter Scope</span>&nbsp;
  247. 				${templates.remove}
  248. 			</legend>
  249. 			${templates.scope}
  250. 		`;
  251. 		el.parentNode.insertBefore(scope, el);
  252. 		return scope;
  253. 	}
  254.  
  255. 	function addMenu() {
  256. 		GM_addStyle(`
  257. 			#ghch-open-menu { cursor:pointer; }
  258. 			#ghch-menu { position:fixed; z-index: 65535; top:0; bottom:0; left:0; right:0; opacity:0; visibility:hidden; }
  259. 			#ghch-menu.ghch-open { opacity:1; visibility:visible; background:rgba(0,0,0,.5); }
  260. 			#ghch-settings-inner { position:fixed; left:50%; top:50%; transform:translate(-50%,-50%); width:25rem; box-shadow:0 .5rem 1rem #111; }
  261. 			#ghch-settings-inner h3 .btn { float:right; font-size:.8em; padding:0 6px 2px 6px; margin-left:3px; }
  262. 			.ghch-remove, .ghch-remove svg, #ghch-settings-inner .ghch-close svg { vertical-align:middle; cursor:pointer; }
  263. 			.ghch-menu-inner { max-height:60vh; overflow-y:auto; }
  264. 			.ghch-menu-inner ul { list-style:none; }
  265. 			.ghch-menu-inner li { white-space:pre; margin-bottom:4px; }
  266. 			.ghch-scope-all, .ghch-scope-add, .ghch-scope-custom { width:100%; border:2px solid rgba(85,85,85,0.5); border-radius:4px; padding:10px; margin:0; }
  267. 			.ghch-scope-add, .ghch-hotkey-add { border:2px dashed #555; border-radius:4px; opacity:0.6; text-align:center; cursor:pointer; margin-top:10px; }
  268. 			.ghch-scope-add:hover, .ghch-hotkey-add:hover { opacity:1;  }
  269. 			.ghch-menu-inner legend span { padding:0 6px; min-width:30px; border:0; }
  270. 			.ghch-hotkey { width:60px; }
  271. 			.ghch-menu-inner li .ghch-remove { margin-left:10px; }
  272. 			.ghch-menu-inner li .ghch-remove:hover, .ghch-menu-inner legend .ghch-remove:hover { color:#800; }
  273. 			.ghch-json-code { display:none; font-family:Menlo, Inconsolata, 'Droid Mono', monospace; font-size:1em; }
  274. 			.ghch-json-code.ghch-open { position:absolute; top:37px; bottom:0; left:2px; right:2px; z-index:0; width:396px; max-width:396px; max-height:calc(100% - 37px); display:block; }
  275. 		`);
  276.  
  277. 		// add menu
  278. 		let menu = document.createElement("div");
  279. 		menu.id = "ghch-menu";
  280. 		menu.innerHTML = `
  281. 			<div id="ghch-settings-inner" class="boxed-group">
  282. 				<h3>
  283. 					GitHub Custom Hotkey Settings
  284. 					<button type="button" class="btn btn-sm ghch-close tooltipped tooltipped-n" aria-label="Close";>
  285. 						${templates.remove}
  286. 					</button>
  287. 					<button type="button" class="ghch-code btn btn-sm tooltipped tooltipped-n" aria-label="Toggle JSON data view">{ }</button>
  288. 					<a href="https://github.com/Mottie/GitHub-userscripts/wiki/GitHub-custom-hotkeys" class="ghch-help btn btn-sm tooltipped tooltipped-n" aria-label="Get Help">?</a>
  289. 				</h3>
  290. 				<div class="ghch-menu-inner boxed-group-inner">
  291. 					<fieldset class="ghch-scope-all">
  292. 						<legend>
  293. 							<span class="simple-box" data-scope="all">All of GitHub &amp; subdomains</span>
  294. 						</legend>
  295. 						${templates.scope}
  296. 					</fieldset>
  297. 					<div class="ghch-scope-add">+ Click to add a new scope</div>
  298. 					<textarea class="ghch-json-code"></textarea>
  299. 				</div>
  300. 			</div>
  301. 		`;
  302. 		$("body").appendChild(menu);
  303. 		// Create our menu entry
  304. 		menu = document.createElement("a");
  305. 		menu.id = "ghch-open-menu";
  306. 		menu.className = "dropdown-item";
  307. 		menu.innerHTML = "GitHub Hotkey Settings";
  308.  
  309. 		const els = $$(`
  310. 			.header .dropdown-item[href="/settings/profile"],
  311. 			.header .dropdown-item[data-ga-click*="go to profile"],
  312. 			.Header .dropdown-item[href="/settings/profile"],
  313. 			.Header .dropdown-item[data-ga-click*="go to profile"],
  314. 			.js-header-wrapper .dropdown-item[href="/settings/profile"],
  315. 			.js-header-wrapper .dropdown-item[data-ga-click*="go to profile"]
  316. 		`);
  317. 		if (els.length) {
  318. 			els[els.length - 1].parentNode.insertBefore(menu, els[els.length - 1].nextSibling);
  319. 		}
  320. 		addBindings();
  321. 	}
  322.  
  323. 	function openPanel() {
  324. 		updateMenu();
  325. 		$("#ghch-menu").classList.add("ghch-open");
  326. 		return false;
  327. 	}
  328.  
  329. 	function closePanel() {
  330. 		const menu = $("#ghch-menu");
  331. 		if (menu.classList.contains("ghch-open")) {
  332. 			// update data in case a "change" event didn't fire
  333. 			refreshData();
  334. 			checkScope();
  335. 			menu.classList.remove("ghch-open");
  336. 			$(".ghch-json-code", menu).classList.remove("ghch-open");
  337. 			window.location.hash = "";
  338. 			return false;
  339. 		}
  340. 	}
  341.  
  342. 	function addJSON() {
  343. 		const textarea = $(".ghch-json-code");
  344. 		textarea.value = JSON
  345. 			.stringify(data, null, 2)
  346. 			// compress JSON a little
  347. 			.replace(/\n\s{4}\}/g, " }")
  348. 			.replace(/\{\n\s{6}/g, "{ ");
  349. 	}
  350.  
  351. 	function processJSON() {
  352. 		let val;
  353. 		const textarea = $(".ghch-json-code");
  354. 		try {
  355. 			val = JSON.parse(textarea.value);
  356. 			data = val;
  357. 		} catch (err) {}
  358. 	}
  359.  
  360. 	function updateMenu() {
  361. 		const menu = $(".ghch-menu-inner");
  362. 		removeElms(menu, ".ghch-scope-custom");
  363. 		removeElms($(".ghch-scope-all ul", menu), ".ghch-hotkey-set");
  364. 		let scope, selector;
  365. 		// Add scopes
  366. 		Object.keys(data).forEach(key => {
  367. 			if (key === "all") {
  368. 				selector = "all";
  369. 				scope = $(".ghch-scope-all .ghch-hotkey-add", menu);
  370. 			} else if (key !== selector) {
  371. 				selector = key;
  372. 				scope = addScope($(".ghch-scope-add"));
  373. 				$("legend span", scope).innerHTML = key;
  374. 				scope = $(".ghch-hotkey-add", scope);
  375. 			}
  376. 			// add hotkey entries
  377. 			// eslint-disable-next-line no-loop-func
  378. 			data[key].forEach(val => {
  379. 				const target = addHotkey(scope),
  380. 					tmp = Object.keys(val)[0];
  381. 				$(".ghch-hotkey", target).value = tmp;
  382. 				$(".ghch-url", target).value = val[tmp];
  383. 			});
  384. 		});
  385. 	}
  386.  
  387. 	function refreshData() {
  388. 		data = {};
  389. 		let tmp, scope, sIndx, hotkeys, scIndx, scLen, val;
  390. 		const menu = $(".ghch-menu-inner"),
  391. 			scopes = $$("fieldset", menu),
  392. 			sLen = scopes.length;
  393. 		for (sIndx = 0; sIndx < sLen; sIndx++) {
  394. 			tmp = $("legend span", scopes[sIndx]);
  395. 			if (tmp) {
  396. 				scope = tmp.getAttribute("data-scope") || tmp.textContent.trim();
  397. 				hotkeys = $$(".ghch-hotkey-set", scopes[sIndx]);
  398. 				scLen = hotkeys.length;
  399. 				data[scope] = [];
  400. 				for (scIndx = 0; scIndx < scLen; scIndx++) {
  401. 					tmp = $$("input", hotkeys[scIndx]);
  402. 					val = (tmp[0] && tmp[0].value) || "";
  403. 					if (val) {
  404. 						data[scope][scIndx] = {};
  405. 						data[scope][scIndx][val] = tmp[1].value || "";
  406. 					}
  407. 				}
  408. 			}
  409. 		}
  410. 		GM_setValue("github-hotkeys", data);
  411. 		debug("Data refreshed", data);
  412. 	}
  413.  
  414. 	function addBindings() {
  415. 		let tmp;
  416. 		const menu = $("#ghch-menu");
  417.  
  418. 		// open menu
  419. 		on($("#ghch-open-menu"), "click", openPanel);
  420. 		// close menu
  421. 		on(menu, "click", closePanel);
  422. 		on($("body"), "keydown", event => {
  423. 			if (event.which === 27) {
  424. 				closePanel();
  425. 			}
  426. 		});
  427. 		// stop propagation
  428. 		on($("#ghch-settings-inner", menu), "keydown", event => {
  429. 			event.stopPropagation();
  430. 		});
  431. 		on($("#ghch-settings-inner", menu), "click", event => {
  432. 			event.stopPropagation();
  433. 			let target = event.target;
  434. 			// add hotkey
  435. 			if (target.classList.contains("ghch-hotkey-add")) {
  436. 				addHotkey(target);
  437. 			} else if (target.classList.contains("ghch-scope-add")) {
  438. 				addScope(target);
  439. 			}
  440. 			// svg & path nodeName may be lowercase
  441. 			tmp = target.nodeName.toLowerCase();
  442. 			if (tmp === "path") {
  443. 				target = target.parentNode;
  444. 			}
  445. 			// target should now point at svg
  446. 			if (target.classList.contains("ghch-remove")) {
  447. 				tmp = target.parentNode;
  448. 				// remove fieldset
  449. 				if (tmp.nodeName === "LEGEND") {
  450. 					tmp = tmp.parentNode;
  451. 				}
  452. 				// remove li; but not the button in the header
  453. 				if (tmp.nodeName !== "BUTTON") {
  454. 					tmp.parentNode.removeChild(tmp);
  455. 					refreshData();
  456. 				}
  457. 			}
  458. 		});
  459. 		on(menu, "change", refreshData);
  460. 		// contenteditable scope title
  461. 		on(menu, "input", event => {
  462. 			if (event.target.classList.contains("simple-box")) {
  463. 				refreshData();
  464. 			}
  465. 		});
  466. 		on($("button.ghch-close", menu), "click", closePanel);
  467. 		// open JSON code textarea
  468. 		on($(".ghch-code", menu), "click", () => {
  469. 			$(".ghch-json-code", menu).classList.toggle("ghch-open");
  470. 			addJSON();
  471. 		});
  472. 		// close JSON code textarea
  473. 		tmp = $(".ghch-json-code", menu);
  474. 		on(tmp, "focus", function () {
  475. 			this.select();
  476. 		});
  477. 		on(tmp, "paste", () => {
  478. 			setTimeout(() => {
  479. 				processJSON();
  480. 				updateMenu();
  481. 				$(".ghch-json-code").classList.remove("ghch-open");
  482. 			}, 200);
  483. 		});
  484.  
  485. 		// This is crazy! But window.location.search changes do not fire the
  486. 		// "popstate" or "hashchange" event, so we're stuck with a setInterval
  487. 		setInterval(() => {
  488. 			const loc = window.location;
  489. 			if (lastHref !== loc.href) {
  490. 				lastHref = loc.href;
  491. 				checkScope();
  492. 				// open panel via hash
  493. 				if (loc.hash === openHash) {
  494. 					openPanel();
  495. 				}
  496. 			}
  497. 		}, 1000);
  498. 	}
  499.  
  500. 	function $(str, el) {
  501. 		return (el || document).querySelector(str);
  502. 	}
  503.  
  504. 	function $$(str, el) {
  505. 		return Array.from((el || document).querySelectorAll(str));
  506. 	}
  507.  
  508. 	function on(els, name, callback) {
  509. 		els = Array.isArray(els) ? els : [els];
  510. 		const events = name.split(/\s+/);
  511. 		els.forEach(el => {
  512. 			if (el) {
  513. 				events.forEach(ev => {
  514. 					el.addEventListener(ev, callback);
  515. 				});
  516. 			}
  517. 		});
  518. 	}
  519.  
  520. 	// include a "debug" anywhere in the browser URL (search parameter) to enable debugging
  521. 	function debug() {
  522. 		if (/debug/.test(window.location.search)) {
  523. 			console.log.apply(console, arguments);
  524. 		}
  525. 	}
  526.  
  527. 	// initialize
  528. 	checkScope();
  529. 	addMenu();
  530. })();