Arguments,caller,callee's understanding

The arguments object represents the function being executed and the parameters of the function that called it, arguments is an array but similar

An array of objects that have the same access properties and methods as the array, which can be accessed by arguments[n] to the values of the corresponding individual parameters,

With the length property, it is important to note that the arguments object stores the arguments that are actually passed to the function and is available only at the beginning of the function.

Caller returns a reference to a function that invokes the current function. If the function is called by the top level, caller contains a value of NULL.

Callee returns the body of the Funciton object that is being executed, which is the object of the specified function. Callee is a member of the arguments that represents a reference to the function object itself.

Arguments.length is the length of the argument, and the arguments.callee.length is the length of the parameter. This allows you to determine if the parameter length is consistent with the argument length at the time of the call.

In a recursive function, the function contains a reference to itself, and the function name is simply a variable name.

Calling your own function name inside a function is equivalent to calling a global variable, at which point you can choose to use callee.

Arguments,caller,callee's understanding