wjg

  // usage:  highlight('react', 'node', 'graphql', '$')
  // output: [57, 29, 4, 19]
  function highlight(/* args */) {
    return Array.prototype.slice.call(arguments).map(function(keyword) {
      var matches = 0;
    
      Array.prototype.forEach.call(document.querySelectorAll('tr.athing.comtr div.comment'), function(e) {
        if (e.innerText.search(new RegExp(keyword === '$' ? '\\$' : keyword, 'i')) === -1) return;
        ++matches;
        e.innerHTML = e.innerHTML.replace(new RegExp(keyword === '$' ? '\\$' : keyword, 'ig'), '<span style="background-color:#0095ff;color:#fff;">' + keyword.toUpperCase() + '</span>')
      });
      return matches;
    })
  }