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GM.addStyle Polyfill

Polyfill for GM.addStyle, for some reason their script doesn't work?

此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.cn-greasyfork.org/scripts/35383/231590/GMaddStyle%20Polyfill.js 

  1. // ==UserScript==
  2. // @name         GM.addStyle Polyfill
  3. // @namespace    https://orbitalzero.ovh/scripts
  4. // @version      0.01
  5. // @description  Polyfill for GM.addStyle, for some reason their script doesn't work?
  6. // @author       NeutronNoir
  7. // 
  8. // ==/UserScript==
  9. GM.addStyle = function (aCss) {
  10.   'use strict';
  11.   let head = document.getElementsByTagName('head')[0];
  12.   if (head) {
  13.     let style = document.createElement('style');
  14.     style.setAttribute('type', 'text/css');
  15.     style.textContent = aCss;
  16.     head.appendChild(style);
  17.     return style;
  18.   }
  19.   return null;
  20. };