r('h1').innerHTML + '<\/div>'
          tooltipContentHtml += iframe.contentWindow.document.querySelector('.content').innerHTML
          tooltipContent.innerHTML = tooltipContentHtml
          linkHistories[contentURL] = tooltipContentHtml
          tooltipWrapper.style.display = 'block';
          tooltipWrapper.scrollTop = 0;
          setTimeout(function () {
            tooltipWrapper.style.opacity = 1;
            if (url.indexOf("#") != -1) {
              let id = url.split('#')[1];
              co