Evil Link Converter triggered onmouse

I try to pretend evil Facebook's method.
当前为 2021-09-28 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         Evil Link Converter triggered onmouse
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  I try to pretend evil Facebook's method.
// @author       eggplants
// @homepage     https://github.com/eggplants
// @match        https://twitter.com/*
// @grant        none
// @license      MIT
// ==/UserScript==

/*jshint esversion: 6 */

(function () {
  "use strict";

  const target = "https://google.com";
  var buf = "";
  function uuidv4() {
    return ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, (c) =>
      (
        c ^
        (crypto.getRandomValues(new Uint8Array(1))[0] & (15 >> (c / 4)))
      ).toString(16)
    );
  }
  var t = setInterval(main, 1000);
  function main() {
    Array.from(document.getElementsByTagName("a")).forEach((elm) => {
      if (elm.onmousedown === null) {
        if (elm.id === "") {
          elm.id = uuidv4();
        }
        elm.onmousedown = () => {
          doChange(elm.id);
        };
        if (elm.onmouseup === null) {
          elm.onmouseup = () => {
            undoChange(elm.id);
          };
        }
        if (elm.onmouseleave === null) {
          elm.onmouseleave = () => {
            undoChange(elm.id);
          };
        }
      }
    });
  }
  function doChange(id) {
    e = document.getElementById(id);
    if (e.href !== target) {
      [buf, e.href] = [e.href, target];
    }
  }
  function undoChange(id) {
    e = document.getElementById(id);
    if (e.href === target) {
      e.href = buf;
    }
  }
})();
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