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JS & DOM Reference

Overview

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Checkbox defaultChecked Property

Checkbox Object

Definition and Usage

The defaultChecked property returns the default value of the checked attribute.

This property returns true if the checkbox is checked by default, otherwise it returns false.

Syntax

checkboxObject.defaultChecked

Browser Support

The defaultChecked property is supported in all major browsers.

Example

Check if the checkbox is checked by default:

<html>
<head>
<script>
function displayResult()
{
var x=document.getElementById("myCheck").defaultChecked;
alert(x);
}
</script>
</head>
<body>

<form>
<input type="checkbox" id="myCheck" checked="checked">Do you like summer?
</form>

<button type="button" onclick="displayResult()">Is the checkbox checked by default?</button>

</body>
</html>

Try it yourself »

Checkbox Object