JavaScript Function Reference
New to JavaScript Functions?
In JavaScript, functions are first-class objects, meaning they can have properties and methods just like other objects.
Several built-in methods are available on function objects that provide powerful ways to control their execution context and arguments.
Function Object Methods & Properties
Revised December 2025
| Name | Description |
|---|---|
| apply() | Calls a function with a spesified this
value and an array of arguments |
| bind() | Returns a function with a spesified this value |
| call() | Calls a function with a spesified this
value and individual arguments |
| length | Returns the number of (expected) parameters of a function |
| name | Returns the name of the function |
| toString() | Returns the name of the function |
