yssWaitForNode

Be smart!
Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.org/scripts/454354/1145153/yssWaitForNode.js
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// ==UserScript==
// @name         yssWaitForNode
// @namespace    https://ysslang.com/
// @version      1.2.4.1
// @description  Be smart!
// @author       ysslang
// @match        *://*/*
// @supportURL   https://greasyfork.org/scripts/454354
// @run-at       document-start
// @grant        none
// ==/UserScript==

/* Done
- 去除返回元素中的重复元素, 避免重复执行; bugfix: 忘记加const了;
*/

class WaitForNode {
  #currentURL;
  #observerList = [];
  #waitList = [];

  constructor() { this.#currentURL = window.location.href; }

  #checkIfUrlMatch(matcher) {
    var result = false;
    if (matcher === undefined || matcher === null) result = false;
    if (typeof matcher === "string") result = new RegExp(matcher.trim()).test(this.#currentURL);
    if (matcher instanceof RegExp) result = matcher.test(this.#currentURL);
    return result;
  }

  #determineParentElement(arg) {
    var result = document;
    if (typeof arg === "string" && document.querySelector(arg)) result = document.querySelector(arg);
    if (arg instanceof Element) result = arg;
    return result;
  }

  #mergeOptions(options) {
    options = options || {};
    var result = {
      immediate: [options.immediate, options.imdt, true].find((e) => typeof (e) !== 'undefined'),
      recursive: [options.recursive, options.rcs, true].find((e) => typeof (e) !== 'undefined'),
      once: [options.once, false].find((e) => typeof (e) !== 'undefined'),
      subtree: [options.subtree, options.sbt, true].find((e) => typeof (e) !== 'undefined'),
      childList: [options.childList, options.cld, true].find((e) => typeof (e) !== 'undefined'),
      parentEl: this.#determineParentElement(options.parent),
    };
    return result;
  }

  #extractMatchedElements(mutations, selector, recursive) {
    const matchedElements = [];
    for (const { addedNodes } of mutations) {
      for (const node of addedNodes) {
        if (!node.tagName) continue;
        else if (node.matches(selector)) matchedElements.push(node);
        else if (recursive && node.firstElementChild) matchedElements.push(...node.querySelectorAll(selector));
      }
    }
    const result = [...new Set(matchedElements)]
    return result;
  }

  #on(selector, callback, options) {
    if (options.immediate) {
      [...options.parentEl.querySelectorAll(selector)].forEach(callback);
    }
    const observer = new MutationObserver((mutations) => {
      const elements = this.#extractMatchedElements(mutations, selector, options.recursive);
      elements.forEach(callback);
      if (elements && options.once) this.disconnect();
    });
    observer.observe(options.parentEl, { subtree: options.subtree, childList: options.childList, });
    this.#observerList.push(observer);
    window.x = observer;
    return observer;
  }

  #injectStyle(styleString) {
    const style = document.createElement('style');
    style.textContent = styleString;
    return document.head.append(style);
  }

  add(name, url, selector, callback, options) {
    if (url === '') url = ['.*'];
    const urls = Array.isArray(url) ? url : [url];
    if (!urls.some(this.#checkIfUrlMatch, this)) return;
    const opts = this.#mergeOptions(options);
    const observer = this.#on(selector, callback, opts);
    this.#waitList.push({ 'name': name, 'url': url, 'selector': selector, 'callback': callback, 'options': opts, 'observer': observer });
  }

  batchAdd(name, url, lists, para4, para5) {
    const callback = typeof para4 === 'function' ? para4 : (typeof para5 === 'function' ? para5 : undefined);
    const options = typeof para4 === 'object' ? para4 : (typeof para5 === 'object' ? para5 : undefined)
    lists.forEach((p) => {
      if (!p.find(pp => typeof pp === 'function')) {
        if (p.length === 1) this.add(name, url, p[0], callback, options);
        else if (p.length === 2) this.add(`${name}-${p[0]}`, url, p[1], callback, options);
      }
      else if (typeof p[1] === 'function') this.add(name, url, p[0], p[1], p[2] || options);
      else if (typeof p[2] === 'function') this.add(`${name}-${p[0]}`, url, p[1], p[2], p[3] || options);
      else if (typeof p[3] === 'function') this.add(`${name}-${p[0]}`, p[1], p[2], p[3], p[4] || options);
      else return;
    })
  }

  addCss(name, url, cssString) {
    if (url === '') url = ['.*'];
    const urls = Array.isArray(url) ? url : [url];
    if (!urls.some(this.#checkIfUrlMatch, this)) return;
    this.#injectStyle(cssString);
  }

  stopAll() {
    while (this.#observerList.length) this.#observerList.pop().disconnect();
  }
}

const WFN = new WaitForNode();