Function watchBodyChange

scripts/backup/m38u_detector.js:764–780

(onchange)

  }

  function watchBodyChange(onchange) {
    let timeout;
    let observer = new MutationObserver(() => {
      if (!timeout) {
        timeout = setTimeout(() => {
          timeout = null;
          onchange();
        }, 200);
      }
    });
    observer.observe(document.documentElement, {
      childList: true,
      subtree: true,
      attributes: true,
      characterData: true,
    });
  }

  function getAllTextNodes(parent) {
    var re = [];