What is the object of arguments in js

This article mainly shows you "what is the object of arguments in js", which is easy to understand and clear. I hope it can help you solve your doubts. Let me lead you to study and learn this article "what is the object of arguments in js".

What is the object of arguments?

An arguments object is a collection of parameter values passed in a function. It is an array-like object because it has a length property, and we can use the array index notation arguments [1] to access a single value, but it does not have built-in methods in the array, such as forEach, reduce, filter, and map.

We can use Array.prototype.slice to convert arguments objects into an array.

Function one () {return Array.prototype.slice.call (arguments);}

Note: there is no arguments object in the arrow function.

Function one () {return arguments;} const two = function () {return arguments;} const three = function three () {return arguments;} const four = () = > arguments;four (); / / Throws an error-arguments is not defined

When we call the function four, it throws a ReferenceError: arguments is not defined error. Using the restsyntax, you can solve this problem.

Const four = (... args) = > args

This automatically places all parameter values in the array.

The above is all the content of the article "what is the object of arguments in js". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!