title
// ==UserScript==
// @name Rig Google Coinflip
// @namespace http://tampermonkey.net/
// @version 0.1
// @description title
// @author Colin Simon-Fellowes
// @match https://www.google.com/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=mozilla.org
// @grant none
// @license MIT
// ==/UserScript==
(function() {
'use strict';
// Check if the page contains a coinflip game
let is_coinflip = (document.querySelector("div[data-parent-funbox='Flip a coin']") != null);
if (!is_coinflip){return 0;}
// Functions to overload Math.random with
let all_heads = function(){return 0;}
let all_tails = function(){return 1;}
let rand = Math.random; // Keep a back-up of Math.random for when we overwrite it
function processKey(e) {
switch (e.key.toLowerCase()){
case 'h':
window.Math.random = all_heads;
console.log("To Heads!"); // debug
break;
case 't':
window.Math.random = all_tails;
console.log("To tails!"); // debug
break;
case 'r':
window.Math.random = rand;
console.log("Back to random!"); // debug
break;
}
}
document.addEventListener("keydown", processKey);
// Your code here...
})();