elinks/test/ecmascript/assert/element.matches.html

<ul id="birds">
  <li>Orange-winged parrot</li>
  <li class="endangered">Philippine eagle</li>
  <li>Great white pelican</li>
</ul>

<script type="text/javascript">

console.error('element.matches');

  var birds = document.getElementsByTagName('li');
  var ch = false;

  for (var i = 0; i < birds.length; i++) {
    if (birds[i].matches('.endangered')) {
      console.assert(birds[i].innerHTML === 'Philippine eagle', birds[i].innerHTML);
      ch = true;
    }
  }
  console.assert(ch, 'was matched');
  birds = document.querySelectorAll('li');

  ch = false;
  var counter = 0;
  birds.forEach(function(b) {
     counter++;
  });
  console.assert(counter === 3, 'Three');

console.exit(0);

</script>