Javascript DOM HTML NodeList length Property get <paragraph> elements inside div

Introduction

Find out how many <p> elements there are inside a <div> element:

Click the button to find out how many p elements there are inside the div element.

View in separate window 

<!DOCTYPE html>
<html>
<head>
<style>
div {// w  w  w .  java 2  s.  c  om
  border: 1px solid black;
  margin: 5px;
}
</style>
</head>
<body>

<div id="myDIV">
  <p>First p element in div.</p>
  <p>Another p element in div.</p>
  <p>A third p element in div.</p>
</div>
<button onclick="myFunction()">Test</button>

<p id="demo"></p>

<script>
function myFunction() {
  var div = document.getElementById("myDIV");
  var nodelist = div.getElementsByTagName("P");
  document.getElementById("demo").innerHTML = nodelist.length;
}
</script>

</body>
</html>



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