powerline.io

Replaces inline JS on powerline.io
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// ==UserScript==
// @name         powerline.io
// @namespace    http://tampermonkey.net/
// @version      0.7
// @description  Replaces inline JS on powerline.io
// @author       Shaun Mitchell <guy#4962>
// @match        *://powerline.io/*
// @grant        unsafeWindow
// @run-at       document-start
// ==/UserScript==

var evilJSRegex = /SpaceWars/;
var replacementJSUrl = "http://test.shitchell.com/powerline/custom.js";

function removeInlineJS(e) {
    if (evilJSRegex.test(e.target.innerText)) {
        // Stop the default JS from running
        e.stopPropagation();
        e.preventDefault();

        // Create a new script tag for our custom JS
        var awesomeJS = document.createElement("script");
        awesomeJS.type = "text/javascript";
        awesomeJS.src = replacementJSUrl;

        // Replace the old JS with our custom shiznit
        var parentNode = e.target.parentNode;
        parentNode.removeChild(e.target);
        parentNode.appendChild(awesomeJS);

        // Remove the event listener
        unsafeWindow.removeEventListener("beforescriptexecute", removeInlineJS, true);
    }
}

(function() {
    'use strict';
    Object.defineProperty(unsafeWindow, "debug", {
        get: function() {
            return true;
        },
        set: function(x) {
            console.log("Cannot change value of debug variable.");
        }
    });

    unsafeWindow.addEventListener("beforescriptexecute", removeInlineJS, true);
})();