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JavaScript Boolean Reference
Last Updated :
12 Jul, 2025
JavaScript Boolean is a datatype that returns either true or false In JavaScript, a boolean is used as a function to get the value of a variable, object, conditions, expressions, etc in terms of true or false
Syntax:
Boolean(variable/expression)
Example: If the operands are equal, the equal to operator == returns true
JavaScript
console.log(15 == 15)
console.log(15 == 11)
The complete list of JavaScript Boolean has listed below:
JavaScript Boolean Constructor: A constructor gets called when an object is created using the new keyword.
| Constructor | Descriptions |
|---|
| Boolean() | Create Boolean objects or return primitive values of type boolean. |
JavaScript Boolean Properties: A JavaScript property is a member of an object that associates a key with a value.
- Instance Property: An instance property is a property that has a new copy for every new instance of the class.
| Instance Properties | Descriptions |
|---|
| constructor | Add a new property and methods to all Boolean instances. |
JavaScript Boolean Methods: Methods are actions that can be performed on objects.
- Instance Method: If the method is called on an instance of a boolean then it is called an instance method.
| Instance Methods | Descriptions |
|---|
| valueOf() | Returns the value of boolean object. |
| toString() | Returns a string according to the Boolean value. |
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