JavaScript Booleans

The Boolean object is used to convert a non-Boolean value to a Boolean value (true or false).

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Try it Yourself - Examples

Check Boolean value
Check if a Boolean object is true or false.

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Create a Boolean Object

The Boolean object represents two values: "true" or "false".

The following code creates a Boolean object called myBoolean:

var myBoolean=new Boolean();

If the Boolean object has no initial value, or if the passed value is one of the following:

• 0
• -0
• null
• ""
• false
• undefined
• NaN

the object is set to false. For any other value it is set to true (even with the string "false")!

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Complete Boolean Reference

For a complete reference, go to our Complete JavaScript Boolean Reference.

The reference contains descriptions and examples of all Boolean properties and methods.