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URL.canParse Polyfill

Polyfill for URL.canParse() in older browsers

  1. // ==UserScript==
  2. // @name         URL.canParse Polyfill
  3. // @version      0.1.0
  4. // @description  Polyfill for URL.canParse() in older browsers
  5. // @author       dragonish
  6. // @namespace    https://github.com/dragonish
  7. // @license      GNU General Public License v3.0 or later
  8. // @match        *://*/*
  9. // @compatible   chrome version < 120
  10. // @grant        none
  11. // ==/UserScript==
  12.  
  13. (function () {
  14.   if (typeof URL.canParse !== 'function') {
  15.     URL.canParse = function (url, base) {
  16.       try {
  17.         const _fullUrl = base ? new URL(url, base) : new URL(url);
  18.         return true;
  19.       } catch (e) {
  20.         return false;
  21.       }
  22.     };
  23.   }
  24. })();