JavaScript Boolean Reference
JavaScript Booleans
JavaScript booleans can have one of two values: true or false.
The Boolean() Function
You can use the Boolean() function to find out if an expression is true:
Or even easier:
For a tutorial about booleans, read our JavaScript Boolean Tutorial.
Boolean Properties
| Property | Description |
|---|---|
| constructor | Returns the function that created JavaScript's Boolean prototype |
| prototype | Allows you to add properties and methods to the Boolean prototype |
Boolean Methods
| Method | Description |
|---|---|
| toString() | Converts a boolean value to a string, and returns the result |
| valueOf() | Returns the primitive value of a boolean |
