BBC：文章字数统计

// Show a word count of the article next to the headline
(function () {
  if (document.getElementById('jz-bbc-wordcount')) { return; }
  var blocks = document.querySelectorAll('[data-component="text-block"]');
  if (!blocks.length) { return; }
  var words = 0;
  blocks.forEach(function (b) {
    words += (b.textContent || '').trim().split(/\s+/).length;
  });
  var h1 = document.querySelector('article h1') || document.querySelector('h1');
  if (!h1) { return; }
  var tag = document.createElement('span');
  tag.id = 'jz-bbc-wordcount';
  tag.textContent = ' (' + words + ' words)';
  tag.style.cssText = 'font-size:0.8em;color:#888;font-weight:400';
  h1.appendChild(tag);
})();