What does the JavaScript new keyword do

Basic process

1. Create an empty object
2. The prototype of an empty object points to the prototype property of its constructor
3. Executes the constructor, and this of the constructor points to the object
4. Determine the return value type of the constructor, if it is a value type, returns the empty object itself, and if it is a reference type, returns the reference type

For example, create an instance of person

function Person (name,age) {    this. Name = name;      this. Age = Age ;} var obj == person.prototype; var result = Person.call (obj,name,age); if (typeof(Result) = = ' object ')    {= result;} Else {    = obj;} return person

What does the JavaScript new keyword do