Method _bindMutationObserver

src/map-extent.js:291–304

()

   * _runMutationObserver
   */
  _bindMutationObserver() {
    this._observer = new MutationObserver((mutationList) => {
      for (let mutation of mutationList) {
        // the attributes changes should be handled by attributeChangedCallback()
        if (mutation.type === 'childList') {
          this._runMutationObserver(mutation.addedNodes);
        }
      }
    });
    // childList observes immediate children only (not grandchildren etc)
    this._observer.observe(this, {
      childList: true
    });
  }
  _runMutationObserver(elementsGroup) {
    const _addMetaElement = (mapMeta) => {
      this.whenReady().then(() => {