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Bunpro: Disable Backspace Undo

Disables the backspace functionality in reviews

  1. // ==UserScript==
  2. // @name         Bunpro: Disable Backspace Undo
  3. // @namespace    http://tampermonkey.net/
  4. // @version      1.0.6
  5. // @description  Disables the backspace functionality in reviews
  6. // @author       Kumirei
  7. // @include      *bunpro.jp/*
  8. // @exclude      *community.bunpro.jp*
  9. // @require      https://greasyfork.org/scripts/370623-bunpro-helpful-events/code/Bunpro:%20Helpful%20Events.js?version=974369
  10. // @grant        none
  11. // ==/UserScript==
  12.  
  13. (function() {
  14.     var $ = window.$;
  15.     $('html')[0].addEventListener('quiz-page', ()=>{
  16.         var input_elem = $('#study-answer-input');
  17.         $('body').keydown((event)=>{
  18.             var colors = input_elem.css('background-color').match(/\d+/g);
  19.             var sum = colors.reduce((a, b)=>Number(a)+Number(b));
  20.             var redness = colors[0]/sum;
  21.             if (event.keyCode == 8 && redness > 0.4) {
  22.                 event.stopPropagation();
  23.                 input_elem.blur();
  24.             }
  25.         });
  26.     });
  27. })();