Example
An HTML form with a pre-selected checkbox:
<form
action="demo_form.asp">
<input type="checkbox" name="vehicle" value="Bike"> I have a bike<br>
<input type="checkbox" name="vehicle" value="Car" checked>
I have a car<br>
<input type="submit" value="Submit">
</form>
Try it Yourself »
Definition and Usage
The checked attribute is a boolean attribute.
When present, it specifies that an <input> element should be pre-selected (checked) when the page loads.
The checked attribute can be used with <input type="checkbox"> and <input type="radio">.
The checked attribute can also be set after the page load, with a JavaScript.
Browser Support
The numbers in the table specify the first browser version that fully supports the attribute.
| Attribute | |||||
|---|---|---|---|---|---|
| checked | 1.0 | 2.0 | 1.0 | 1.0 | 1.0 |
Differences Between HTML 4.01 and HTML5
NONE.
Differences Between HTML and XHTML
In XHTML, attribute minimization is forbidden, and the checked attribute must be defined as <input checked="checked" />.
Syntax
<input checked>