Slow down twitch chat

slow-down-twitch-chat.js

// INSTRUCTIONS
// 1. paste in Google Chrome dev console
// 2. enjoy!

// don't display any chat messages by default
var style = document.createElement("style");
style.appendChild(document.createTextNode(""));
document.head.appendChild(style);
style.sheet.insertRule("body .ember-chat .chat-messages .chat-line {display: none;}", 0);

// every second (1000ms), show the last chat message
setInterval(function () {
  var allChatLines = Array.from(document.querySelectorAll('.ember-chat .chat-messages .chat-line'));
  var lastChatLine = allChatLines[allChatLines.length - 1];
  lastChatLine.style.display = 'block';
}, 1000);