Javascript DOM HTML HTMLCollection length Property

Introduction

Find out how many P elements in the document:

Click the button to alert the number of P elements on this document:

View in separate window 

<!DOCTYPE html>
<html>
<body>
<p>The length property returns the number of elements in a HTMLCollection.</p>
<p>The length property returns the number of elements in a HTMLCollection.</p>
<p>The length property returns the number of elements in a HTMLCollection.</p>
<p>The length property returns the number of elements in a HTMLCollection.</p>
<p>The length property returns the number of elements in a HTMLCollection.</p>
<button onclick="myFunction()">Count P elements</button>
<p id="myP"></p>
<script>
function myFunction() {/*from  w w w .  j  a v  a2 s  .  c  om*/
  var l = document.getElementsByTagName("P").length;
  document.getElementById("myP").innerHTML = l;
}
</script>

</body>
</html>

The length property returns the number of elements in a HTMLCollection.

This property is read-only.




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