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JavaScript Boolean Reference

This chapter contains a brief overview of the properties and method of the global Boolean object.

The JavaScript Boolean Object

The Boolean object is an object wrapper around the boolean value true or false. This Boolean object type exists primarily to provide a toString() method to convert boolean values to strings.

To learn more about the Boolean, please check out the JavaScript data types chapter.

Boolean Properties

The following table lists the standard properties of the Boolean object.

Property Description
prototype Allows you to add new properties and methods to a Boolean object.

Note: Every object in JavaScript has a constructor property that refers to the constructor function that was used to create the instance of that object.


Boolean Methods

The following table lists the standard methods of the Boolean object.

Method Description
toString() Converts a Boolean value to a string, and returns the result.
valueOf() Returns the primitive value of a Boolean object.
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