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Prevent Accidental Tab Closure with "ctrl + w" [recommended for sploop.io and moomoo.io]

Prevents accidental tab closure when you press ctrl+w

  1. // ==UserScript==
  2. // @name         Prevent Accidental Tab Closure with "ctrl + w" [recommended for sploop.io and moomoo.io]
  3. // @namespace    http://tampermonkey.net/
  4. // @version      2
  5. // @description  Prevents accidental tab closure when you press ctrl+w
  6. // @author       Lore
  7. // @match        *://*/*
  8. // @grant        none
  9. // @license MIT
  10. // ==/UserScript==
  11.  
  12. (function() {
  13.     'use strict';
  14.  
  15.     window.addEventListener('beforeunload', function(e) {
  16.         e.preventDefault();
  17.         e.returnValue = '';
  18.     });
  19.  
  20.     window.addEventListener('keydown', function(e) {
  21.         if (e.ctrlKey && e.key === 'w') {
  22.             e.preventDefault();
  23.             var confirmed = confirm('Are you sure you would like to close this tab or was this a accident?');
  24.             if (confirmed) {
  25.                 window.removeEventListener('beforeunload');
  26.                 window.close();
  27.             }
  28.         }
  29.     });
  30. })();