Element querySelectorAll() Method - Javascript DOM

Javascript examples for DOM:Element querySelectorAll

  1. HOME
  2. Javascript
  3. DOM
  4. Element querySelectorAll

Description

The querySelectorAll() method returns child elements by CSS selector(s) as a static NodeList object.

The NodeList is a static collection, changes in the DOM has NO effect in the collection.

It throws a SYNTAX_ERR exception if the specified selector(s) is invalid

Parameter Values

Parameter Type Description
CSS selectors String Required.

Return Value:

A NodeList object, representing all child elements that matches a specified CSS selector(s).

The following code shows how to Set the background color of the first element with class="example" inside of a <div> element:

Demo Code

ResultView the demo in separate window 

<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {/*from w  w  w . j  a v  a  2 s . c o 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>
</div>

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

<script>
function myFunction() {
    var x = document.getElementById("myDIV").querySelectorAll(".example");
    x[0].style.backgroundColor = "red";
}
</script>

</body>
</html>

Related Tutorials