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LegacyGM.js

A userscript library for adding support back to GM_ non async functions

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.cn-greasyfork.org/scripts/534637/1581445/LegacyGMjs.js 

  1. /* LegacyGM.js
  2.  - Version: 1.0.3
  3.  - Author: Haka
  4.  - Description: A userscript library for adding support back to GM_ non async functions
  5.  - GitHub: https://github.com/Psyyke/A.C.A.S/
  6. */
  7.  
  8. async function LOAD_LEGACY_GM_SUPPORT() {
  9.     if(typeof GM !== 'object') return;
  10.  
  11.     const noLegacyInfo =      typeof GM_info === 'undefined'              && typeof GM?.info !== 'undefined',
  12.           onlyModernSet =     typeof GM?.setValue === 'function'          && typeof GM_setValue === 'undefined',
  13.           onlyModernGet =     typeof GM?.getValue === 'function'          && typeof GM_getValue === 'undefined',
  14.           onlyModernList =    typeof GM?.listValues === 'function'        && typeof GM_listValues === 'undefined',
  15.           deleteValueExists = typeof GM?.deleteValue === 'function',
  16.           openInTabExists =   typeof GM?.openInTab === 'function';
  17.  
  18.     if(noLegacyInfo) globalThis.GM_info = GM.info;
  19.     if(!onlyModernList && !onlyModernGet && !onlyModernSet) return;
  20.  
  21.     const gmCache = {};
  22.     const gmFunctions = {
  23.         GM_setValue: (key, value) => {
  24.             GM.setValue(key, value);
  25.             gmCache[key] = value;
  26.         },
  27.         GM_getValue: (key, defaultValue) => {
  28.             return key in gmCache ? gmCache[key] : defaultValue;
  29.         },
  30.         GM_deleteValue: (key) => {
  31.             GM.deleteValue(key);
  32.             delete gmCache[key];
  33.         },
  34.         GM_listValues: () => {
  35.             return Object.keys(gmCache);
  36.         },
  37.         GM_openInTab: (url, options = false) => {
  38.             if(openInTabExists)
  39.                 return GM.openInTab(url, options);
  40.  
  41.             return window.open(url, '_blank');
  42.         },
  43.     };
  44.  
  45.     setInterval(async () => {
  46.         const keys = await GM.listValues();
  47.  
  48.         // Load existing
  49.         for(const key of keys) {
  50.             gmCache[key] = await GM.getValue(key);
  51.         }
  52.  
  53.         // Remove old
  54.         for(const key in gmCache) {
  55.             if(!keys.includes(key)) {
  56.                 delete gmCache[key];
  57.             }
  58.         }
  59.     }, 1);
  60.  
  61.  
  62.     // Define legacy functions
  63.     for(const [name, func] of Object.entries(gmFunctions)) {
  64.         if(typeof globalThis[name] === 'undefined') {
  65.             Object.defineProperty(globalThis, name, {
  66.                 value: func,
  67.                 writable: false,
  68.                 configurable: false,
  69.                 enumerable: false,
  70.             });
  71.         }
  72.     }
  73. }