Javascript Reference - HTML DOM Input Checkbox defaultChecked Property

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

Browser Support


`defaultChecked`	Yes	Yes	Yes	Yes	Yes

Syntax

var v = checkboxObject.defaultChecked

Return Value

A Boolean type value, true if the checkbox is checked by default, otherwise it returns false.

Example

The following code shows how to check if an checkbox is checked by default.


<!DOCTYPE html>
<html>
<body>
<!--from ww  w  .  j  a va  2s  .  c  om-->
Checkbox:<input type="checkbox" id="myCheck" checked>
<button type="button" onclick="myFunction()">test</button>

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

<script>
function myFunction() {
    var x = document.getElementById("myCheck").defaultChecked;
    document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>

The code above is rendered as follows: