JavaScript Function Reference
Function Object Methods & Properties
Revised December 2025
| Name |
Description |
| apply() |
Calls a function with a specified this
value and an array of arguments |
| bind() |
Returns a function with a specified this value |
| call() |
Calls a function with a specified 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 |
this Precedence
Use the following precedence of order to determine which object
this refers to:
|
| Order | Object | Because |
|---|
| 1 | bind() |
this is in a function being called using bind() |
| 2 | apply() |
this is in a function being called using apply() |
| 2 | call() |
this in is a function being called using call() |
| 3 | Object method |
this in is an object function (method) |
| 4 | Global scope |
this in isa function in the global scope |
