Input Checkbox required Attribute

HTML DOM Input Checkbox Object

Definition and Usage

required Attribute sets or returns whether the checkbox must be selected before submitting the form.

This property reflects the HTML required attribute.

See also:

HTML Reference Manual:HTML <input> required Attribute

Example

Example 1

Determine whether the checkbox must be selected before submitting the form:

var x = document.getElementById("myCheck").required;

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Example 2

Set the checkbox as a required part of form submission:

document.getElementById("myCheck").required = true;

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Syntax

Return the required attribute:

checkboxObject.required

Set the required attribute:

checkboxObject.required = true|false

Attribute value

Value Description
true|false

Specify whether the checkbox should be selected before submitting the form.

  • true - The checkbox must be selected before submitting the form
  • false - Default. This checkbox is not a required part of the form submission.

Technical Details

Return Value: Boolean value, if the checkbox must be selected before submitting the form, it returns true, otherwise return false.

Browser Support

The numbers in the table indicate the first browser version that fully supports this attribute.

Chrome Edge Firefox Safari Opera
Chrome Edge Firefox Safari Opera
Support 10.0 Support Support Support

HTML DOM Input Checkbox Object