Twitter Emoji Alt Fix

twitter-emoji-alt-fix.user.js

// ==UserScript==
// @name     Twitter Emoji Alt Fix
// @description Set the alt text of Twitter Emoji images so that they can be copied correctly
// @version  1
// @grant    none
// @include  https://twitter.com/*
// ==/UserScript==

const SELECTOR = 'img[src*="twimg.com/emoji/"]'

function fixup(img) {
  let tmp = img.src.split('/');
  let hexs = tmp[tmp.length - 1].split('.')[0].split('-');
  let alt = '';
  for(let hex of hexs) alt += String.fromCodePoint(parseInt(hex, 16));
  img.alt = alt;
}

function fixAll() {
	document
  	.querySelectorAll(SELECTOR)
    .forEach(fixup);  
}

fixAll();
setInterval(fixAll, 1000);