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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
Javascript Function.name
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