Element querySelectorAll() Method - Find out how many elements with class="example" there are in a <div> element - Javascript DOM

Javascript examples for DOM:Element querySelectorAll

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Description

Element querySelectorAll() Method - Find out how many elements with class="example" there are in a <div> element

Demo Code

ResultView the demo in separate window 

<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {/*  w  w w.  ja v a2  s . co m*/
    border: 1px solid black;
    margin: 5px;
}
</style>
</head>
<body>

<div id="myDIV">
  <h2 class="example">A heading with class="example" in div</h2>
  <p class="example">A paragraph with class="example" in div.</p>
  <p class="example">Another paragraph with class="example" in div.</p>
</div>

<button onclick="myFunction()">Test</button>

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

<script>
function myFunction() {
    var x = document.getElementById("myDIV").querySelectorAll(".example");
    document.getElementById("demo").innerHTML = x.length;
}
</script>

</body>
</html>

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