In this tutorial, we will learn jQuery class Selector with examples. If you wondering what is a selector, refer my detailed guide on jQuery Selectors.
jQuery class Selector Syntax
$ sign followed by parenthesis and class name mentioned in the parenthesis prefixed with a . (dot).
$(".myclass")
This will select all the elements with the class value as myclass
jQuery class Selector Example
In the following example we have marked three elements with the class value cl, we have marked h2 element, p element and the button element with class cl.
In the jQuery function, on the button click event we are selecting and then changing the background colour of those elements that have the class value equals to cl. Since we have three elements with this class, the background of these elements are changed when the button is clicked.
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(){
$(".cl").css("background-color", "green");
});
});
</script>
</head>
<body>
<h2 class="cl">jQuery class selector example</h2>
<p class="cl">This jQuery class selector example is published on
beginnersbook.com</p>
<p>Class selector selects all the elements that has the specified class</p>
<button class="cl">Click Me!</button>
</body>
</html>
Output: The following two screenshots are taken before and after clicking the Click Me! button.
Before clicking the button:
After clicking the button:
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