extract tweets from timeline

td.js

var env = function () {
  const extUrl = /\(([^)]+)\)/;
  const mo =
    window.MutationObserver ||
    window.WebKitMutationObserver ||
    window.MozMutationObserver;
  const target = document.querySelector('.js-chirp-container');
  const observer = new mo(function (mutations) {
    mutations.forEach((mutation) => {
      const column = mutation.target;
      let limit = 20;
      let extracted = '';
      column.childNodes.forEach((box) => {
        if (--limit < 0) return;
        tweet = box.querySelector('.js-tweet');
        if (!tweet) return;
        // author
        header = tweet.querySelector('.js-tweet-header');
        fullname = header.querySelector('.fullname');
        // text
        text = tweet.querySelector('.js-tweet-text');
        // pic / video
        medias = tweet.querySelectorAll('.js-media-image-link'); // .js-media-preview-container
        let thumbnails = '';
        medias.forEach((m) => {
          const url = m.attributes.style.value.match(extUrl)[1];
          if (!url) return;
          thumbnails += '<img src="' + url + '">';
        });
        extracted += header.outerHTML;
        extracted += text.outerHTML;
        extracted += thumbnails;
      });
      console.log(extracted);
    });
  });
  const config = { attributes: true, childList: true, characterData: true };
  observer.observe(target, config);
  return window.setTimeout(() => {
    observer.disconnect();
    console.log('observer killed');
  }, 60 * 1000);
};
env();