Boolean() constructor

The Boolean() constructor is used to create Boolean objects.

The Boolean() constructor is used to create Boolean objects.

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Syntax

new Boolean([value])

Parameters

value Optional

The initial value of the Boolean object.

Examples

Creating `Boolean` objects with an initial value of `false`

pre data-role="codeBlock" data-info="js" class="language-javascript">

var bNoParam = new Boolean();
var bZero = new Boolean(0);
var bNull = new Boolean(null);
var bEmptyString = new Boolean('');
var bfalse = new Boolean(false);

Creating `Boolean` objects with an initial value of `true`

pre data-role="codeBlock" data-info="js" class="language-javascript">

var btrue = new Boolean(true);
var btrueString = new Boolean('true');
var bfalseString = new Boolean('false');
var bSuLin = new Boolean('Su Lin');
var bArrayProto = new Boolean([]);
var bObjProto = new Boolean({});

Specifications

Specification
[ECMAScript (ECMA-262)
The definition of ‘Boolean constructor’ in that specification.](https://tc39.es/ecma262/#sec-boolean-constructor)

Browser compatibility

The compatibility table on this page is generated from structured data. If you’d like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop	Mobile	Server
	Chrome	Edge	Firefox
—	—	—	—
`Boolean()` constructor	Chrome Full support 1	Edge Full support 12	Firefox Full support 1

What happens next?

Our team will review your report. Once we verify the information you have supplied we will update this browser compatability table accordingly.

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You can join the GitHub repository to see updates and commits for this table data:

https://github.com/mdn/browser-compat-data

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Legend

Full support