Makes CTRL-Enter submit on Scratch comment and forum editors

matu-ctrl-enter.user.js

// ==UserScript==
// @name         Scratch CTRL-Enter
// @namespace    http://aputurk.tk/
// @version      0.1
// @description  Adds keybinds for posting
// @author       MegaApuTurkUltra
// @match        https://scratch.mit.edu/*
// @grant        none
// @run-at       document-end
// ==/UserScript==
/* jshint -W097 */
'use strict';
function main(){
    [].forEach.call(document.querySelectorAll(".markItUpEditor"), function(el){
        el.addEventListener("keydown", function(e){
            if(e.which == 13 && (e.ctrlKey || e.metaKey)){
                e.target.form.querySelector("button[type=submit]").click();
            }
        });
    });
    
    function update() {
        [].forEach.call(document.querySelectorAll("[name=content]:not([ce-evented])"), function(el){
             el.addEventListener("keydown", function(e){
                 if(e.which == 13 && (e.ctrlKey || e.metaKey)){
                     e.target.form.querySelector("[data-control=post]").click();
                 }
             });
             el.setAttribute("ce-evented", "");
         });
    };
    
    var target = document.querySelector('#comments');
    if(target == null) return;
    target.addEventListener("DOMNodeInserted", update);
    update();
}

var interval = setInterval(function(){
    if(document.querySelectorAll){
        clearInterval(interval);
        main();
    }
}, 100);