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恢复 Tiktok 无版权音乐播放

优化性能，避免重复加载和设置

  1. // ==UserScript==
  2. // @name         恢复 Tiktok 无版权音乐播放
  3. // @namespace    http://tampermonkey.net/
  4. // @version      1.1
  5. // @description  优化性能，避免重复加载和设置
  6. // @author       wzj042
  7. // @match        https://www.tiktok.com/*/video/*
  8. // @grant        none
  9. // @icon         https://www.google.com/s2/favicons?sz=64&domain=tiktok.com
  10. // @run-at       document-end
  11. // @license      MIT
  12. // ==/UserScript==
  13.  
  14. (function () {
  15.   function setVideoToPlay() {
  16.     var musicLink = document.querySelector("h4 a");
  17.     var copyright = musicLink
  18.       ? musicLink.href === "https://www.tiktok.com/"
  19.       : false;
  20.  
  21.     if (copyright) {
  22.       var video = document.querySelector("video");
  23.  
  24.       if (video && video.muted && video.volume > 0) {
  25.         video.muted = false;
  26.         // 尝试播放视频
  27.         video.play().catch((e) => {
  28.           if (e.name !== "NotAllowedError") {
  29.             console.error(e);
  30.           }
  31.         });
  32.       }
  33.       // 更新来源
  34.       if (musicLink && !musicLink.dataset.labelSet) {
  35.         var script = document.getElementById(
  36.           "__UNIVERSAL_DATA_FOR_REHYDRATION__"
  37.         );
  38.         if (script) {
  39.           var data = JSON.parse(script.textContent || script.innerText);
  40.           var music =
  41.             data.__DEFAULT_SCOPE__["webapp.video-detail"].itemInfo.itemStruct
  42.               .music;
  43.           var musicLabel = `${music.title}-${music.authorName}`;
  44.           musicLink.innerText = musicLabel;
  45.           musicLink.dataset.labelSet = true; // 标记已设置
  46.         }
  47.       }
  48.     }
  49.   }
  50.  
  51.   setInterval(setVideoToPlay, 1000);
  52. })();