JQuery Checked Selector

JQuery checked selector selects all the elements that are checked. It selects only checked items of checkbox type in the document. It matches every checked input elements in the document. The checked selector is only used for radio buttons or checkboxes.

When compare to checkbox selector, user can change the state by clicking on the element or selecting different value. The checkbox selector can be used to select the checkboxes manually. If we want to select a checkbox to be selected by default then use checked attribute for it. Use checked attribute in the input tag, so that only those checkboxes will get selected by default.

JQuery Checked Selector Syntax

$(“:checked”)

JQuery Checked Selector Example

<!doctype html>
<head>
<title>JQuery Checked Selector</title>
<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
</head>
<h2>JQuery Checked Selector Example</h2>
<style>
 div {
    color: red;
  }
</style>
<script type="text/javascript">
   $(document).ready(function(){
      $(":checkbox").wrap("<span style='background-color:orange'/>");
	 $("input[name='sport']").change(function () {
	    var count = $("input[name='sport']:checked").length;
	       $("div").text(+count+ " checked");
         });
   });
</script>
<form action="">
Select your favourite sport:<br/>
Cricket:<input type="checkbox" name="sport" value="Cricket" checked/>
Football:<input type="checkbox" name="sport" value="Football"/>
Hockey:<input type="checkbox" name="sport" value="Hockey" checked/>
Volleyball:<input type="checkbox" name="sport" value="Volleyball"/>
</form>
<div></div>
</body>
</html>

As shown in the above program, we have used the code inside $(document).ready which is an event which fires up when document is ready. It will run once the page document object model is ready for JavaScript code to execute.
The next line defines checked selector which selects all the checked elements of type checkbox. It uses wrap method which defines HTML structure around element in the matched elements.
$(“input[name=’sport’]”).change(function ()) line defines change event which occurs when value of the element is changed.
var count = $(“input[name=’sport’]:checked”).length; statement defines number of checked checkboxes by specifying name attribute of input tag.
$(“div”).text( +count+ ” checked” ); line specifies how many checkboxes are selected/checked by the user and uses CSS color property to display the message in red color.
When we run the script, we will get four checkboxes as specified in the script. The checkboxes will get display with orange background color around each element. The checked checkboxes will get display with checkmark on the browser.

When you run the above example, you would get the following output: