☰

ElementGetter2.0

async requre element

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.gf.qytechs.cn/scripts/448197/1512335/ElementGetter20.js 

  1. // ==UserScript==
  2. // @name         ElementGetter
  3. // @author       cxxjackie
  4. // @version      2.0.1
  5. // @supportURL   https://bbs.tampermonkey.net.cn/thread-2726-1-1.html
  6. // ==/UserScript==
  7.  
  8. var elmGetter = function() {
  9.     const win = window.unsafeWindow || document.defaultView || window;
  10.     const doc = win.document;
  11.     const listeners = new WeakMap();
  12.     let mode = 'css';
  13.     let $;
  14.     const elProto = win.Element.prototype;
  15.     const matches = elProto.matches || elProto.matchesSelector || elProto.webkitMatchesSelector ||
  16.         elProto.mozMatchesSelector || elProto.oMatchesSelector;
  17.     const MutationObs = win.MutationObserver || win.WebkitMutationObserver || win.MozMutationObserver;
  18.     function addObserver(target, callback) {
  19.         const observer = new MutationObs(mutations => {
  20.             for (const mutation of mutations) {
  21.                 if (mutation.type === 'attributes') {
  22.                     callback(mutation.target, 'attr');
  23.                     if (observer.canceled) return;
  24.                 }
  25.                 for (const node of mutation.addedNodes) {
  26.                     if (node instanceof Element) callback(node, 'insert');
  27.                     if (observer.canceled) return;
  28.                 }
  29.             }
  30.         });
  31.         observer.canceled = false;
  32.         observer.observe(target, {childList: true, subtree: true, attributes: true, attributeOldValue: true});
  33.         return () => {
  34.             observer.canceled = true;
  35.             observer.disconnect();
  36.         };
  37.     }
  38.     function addFilter(target, filter) {
  39.         let listener = listeners.get(target);
  40.         if (!listener) {
  41.             listener = {
  42.                 filters: new Set(),
  43.                 remove: addObserver(target, (el, reason) => listener.filters.forEach(f => f(el, reason)))
  44.             };
  45.             listeners.set(target, listener);
  46.         }
  47.         listener.filters.add(filter);
  48.     }
  49.     function removeFilter(target, filter) {
  50.         const listener = listeners.get(target);
  51.         if (!listener) return;
  52.         listener.filters.delete(filter);
  53.         if (!listener.filters.size) {
  54.             listener.remove();
  55.             listeners.delete(target);
  56.         }
  57.     }
  58.     function query(selector, parent, root, curMode, reason) {
  59.         switch (curMode) {
  60.             case 'css': {
  61.                 if (reason === 'attr') return matches.call(parent, selector) ? parent : null;
  62.                 const checkParent = parent !== root && matches.call(parent, selector);
  63.                 return checkParent ? parent : parent.querySelector(selector);
  64.             }
  65.             case 'jquery': {
  66.                 if (reason === 'attr') return $(parent).is(selector) ? $(parent) : null;
  67.                 const jNodes = $(parent !== root ? parent : []).add([...parent.querySelectorAll('*')]).filter(selector);
  68.                 return jNodes.length ? $(jNodes.get(0)) : null;
  69.             }
  70.             case 'xpath': {
  71.                 const ownerDoc = parent.ownerDocument || parent;
  72.                 selector += '/self::*';
  73.                 return ownerDoc.evaluate(selector, reason === 'attr' ? root : parent, null, 9, null).singleNodeValue;
  74.             }
  75.         }
  76.     }
  77.     function queryAll(selector, parent, root, curMode, reason) {
  78.         switch (curMode) {
  79.             case 'css': {
  80.                 if (reason === 'attr') return matches.call(parent, selector) ? [parent] : [];
  81.                 const checkParent = parent !== root && matches.call(parent, selector);
  82.                 const result = parent.querySelectorAll(selector);
  83.                 return checkParent ? [parent, ...result] : [...result];
  84.             }
  85.             case 'jquery': {
  86.                 if (reason === 'attr') return $(parent).is(selector) ? [$(parent)] : [];
  87.                 const jNodes = $(parent !== root ? parent : []).add([...parent.querySelectorAll('*')]).filter(selector);
  88.                 return $.map(jNodes, el => $(el));
  89.             }
  90.             case 'xpath': {
  91.                 const ownerDoc = parent.ownerDocument || parent;
  92.                 selector += '/self::*';
  93.                 const xPathResult = ownerDoc.evaluate(selector, reason === 'attr' ? root : parent, null, 7, null);
  94.                 const result = [];
  95.                 for (let i = 0; i < xPathResult.snapshotLength; i++) {
  96.                     result.push(xPathResult.snapshotItem(i));
  97.                 }
  98.                 return result;
  99.             }
  100.         }
  101.     }
  102.     function isJquery(jq) {
  103.         return jq && jq.fn && typeof jq.fn.jquery === 'string';
  104.     }
  105.     function getOne(selector, parent, timeout) {
  106.         const curMode = mode;
  107.         return new Promise(resolve => {
  108.             const node = query(selector, parent, parent, curMode);
  109.             if (node) return resolve(node);
  110.             let timer;
  111.             const filter = (el, reason) => {
  112.                 const node = query(selector, el, parent, curMode, reason);
  113.                 if (node) {
  114.                     removeFilter(parent, filter);
  115.                     timer && clearTimeout(timer);
  116.                     resolve(node);
  117.                 }
  118.             };
  119.             addFilter(parent, filter);
  120.             if (timeout > 0) {
  121.                 timer = setTimeout(() => {
  122.                     removeFilter(parent, filter);
  123.                     resolve(null);
  124.                 }, timeout);
  125.             }
  126.         });
  127.     }
  128.     return {
  129.         get currentSelector() {
  130.             return mode;
  131.         },
  132.         get(selector, ...args) {
  133.             let parent = typeof args[0] !== 'number' && args.shift() || doc;
  134.             if (mode === 'jquery' && parent instanceof $) parent = parent.get(0);
  135.             const timeout = args[0] || 0;
  136.             if (Array.isArray(selector)) {
  137.                 return Promise.all(selector.map(s => getOne(s, parent, timeout)));
  138.             }
  139.             return getOne(selector, parent, timeout);
  140.         },
  141.         each(selector, ...args) {
  142.             let parent = typeof args[0] !== 'function' && args.shift() || doc;
  143.             if (mode === 'jquery' && parent instanceof $) parent = parent.get(0);
  144.             const callback = args[0];
  145.             const curMode = mode;
  146.             const refs = new WeakSet();
  147.             for (const node of queryAll(selector, parent, parent, curMode)) {
  148.                 refs.add(curMode === 'jquery' ? node.get(0) : node);
  149.                 if (callback(node, false) === false) return;
  150.             }
  151.             const filter = (el, reason) => {
  152.                 for (const node of queryAll(selector, el, parent, curMode, reason)) {
  153.                     const _el = curMode === 'jquery' ? node.get(0) : node;
  154.                     if (refs.has(_el)) break;
  155.                     refs.add(_el);
  156.                     if (callback(node, true) === false) {
  157.                         return removeFilter(parent, filter);
  158.                     }
  159.                 }
  160.             };
  161.             addFilter(parent, filter);
  162.         },
  163.         create(domString, ...args) {
  164.             const returnList = typeof args[0] === 'boolean' && args.shift();
  165.             const parent = args[0];
  166.             const template = doc.createElement('template');
  167.             template.innerHTML = domString;
  168.             const node = template.content.firstElementChild;
  169.             if (!node) return null;
  170.             parent ? parent.appendChild(node) : node.remove();
  171.             if (returnList) {
  172.                 const list = {};
  173.                 node.querySelectorAll('[id]').forEach(el => list[el.id] = el);
  174.                 list[0] = node;
  175.                 return list;
  176.             }
  177.             return node;
  178.         },
  179.         selector(desc) {
  180.             switch (true) {
  181.                 case isJquery(desc):
  182.                     $ = desc;
  183.                     return mode = 'jquery';
  184.                 case !desc || typeof desc.toLowerCase !== 'function':
  185.                     return mode = 'css';
  186.                 case desc.toLowerCase() === 'jquery':
  187.                     for (const jq of [window.jQuery, window.$, win.jQuery, win.$]) {
  188.                         if (isJquery(jq)) {
  189.                             $ = jq;
  190.                             break;
  191.                         }
  192.                     }
  193.                     return mode = $ ? 'jquery' : 'css';
  194.                 case desc.toLowerCase() === 'xpath':
  195.                     return mode = 'xpath';
  196.                 default:
  197.                     return mode = 'css';
  198.             }
  199.         }
  200.     };
  201. }();

欢迎访问Greasy Fork镜像

土豆服务器，请按需使用

镜像地址随时可能被墙，建议加群获取最新地址

加入Q群

QingJ © 2025

镜像随时可能失效，请加Q群300939539或关注我们的公众号极客氢云获取最新地址