Merge pull request #257 from frank-xjh/master

    pos -= comments.textContent.length;

  }

  var textLength = 0;

  if (pos < 0) textLength = (document.getElementsByClassName('md-content__inner')[0].textContent.slice(0, pos).replace(/\s/g, '').length);

  else textLength = (document.getElementsByClassName('md-content__inner')[0].textContent.replace(/\s/g, '').length);

  if (pos < 0) textLength = (document.getElementsByClassName('md-content__inner')[0].textContent.slice(0, pos).replace(/\s/g, '').length - document.getElementsByTagName('h1')[0].textContent.replace(/\s/g, '').length - document.getElementsByClassName('page-copyright')[0].textContent.replace(/\s/g, '').length - 4);

  else textLength = (document.getElementsByClassName('md-content__inner')[0].textContent.replace(/\s/g, '').length - document.getElementsByTagName('h1')[0].textContent.replace(/\s/g, '').length - document.getElementsByClassName('page-copyright')[0].textContent.replace(/\s/g, '').length - 4);

  var ti = Math.ceil(textLength / 400);

  cur.innerHTML = `<p>本页面共 ${textLength} 字，预计阅读需要 ${ti} 分钟</p>`;

  if (textLength > 0) cur.innerHTML = `<p>本页面共 ${textLength} 字，预计阅读需要 ${ti} 分钟</p>`;

  else cur.innerHTML = `<p>本页面还在建设中，欢迎参与完善！</p>`;

}