JavaScript Function Object

In JavaScript, functions have properties and methods just like other objects because they themselves are Function objects.

In this reference page, you will find all methods of a Function object and its properties. For example, the length property of a function denotes the number of arguments expected by the function.

JavaScript Function toString()

Returns source code of function as a string

Javascript Function.length

Returns the number of parameters of a function


Returns the name of the given function

Javascript Function apply()

calls function with this value and array of args

Javascript Function call()

Calls a function with a given this value and args

JavaScript Function bind()

Creates new function with given this value & args