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<!DOCTYPE html>
<html>
<body>
​
<h1>HTMLCollection length Property</h1>
​
<p>The length property returns the number of elements in a HTMLCollection.</p>
​
<p>Click the button to alert the number of P elements on this document:</p>
​
<button onclick="myFunction()">Count P elements</button>
​
<script>
function myFunction() {
  var l = document.getElementsByTagName("P").length;
  alert(l);
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_htmlcollection_length by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 05 Jun 2019 14:05:38 GMT -->
</html>
​
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