kewords block for twitch chat

twitchchat_keywordblock.user.js

// ==UserScript==
// @name     twitch_user_hide
// @version  1
// @grant    none
// @match    *://www.twitch.tv/*
// @run-at   document-idle
// ==/UserScript==

let blockList = ['specificusername1','specificusername2', 'specifickeywords1'];

window.setTimeout(function () { 

  console.log('block start');
  let target = document.querySelector('.simplebar-content div[role="log"]');
  let observer = new MutationObserver(function(mutations) {
    
    mutations.forEach(function(mutation) {
      let chatLine = target.querySelectorAll('.chat-line__message');
      let newLine = chatLine[chatLine.length - 1];

      blockList.forEach(index => {
        if (newLine.textContent.includes(index)) {
          console.log(newLine.textContent);
          newLine.style.display = "none";
          // newLine.remove();
        }	
      }); 

    });    
  });
  let config = { attributes: false, childList: true, characterData: false };
  observer.observe(target, config);
}, 3000);