An error occurred when the constructor returned its own instance inside.

I javascript A novice, recently encountered a problem that I have been unable to understand, as follows:

var A = function() {
    return new B()
}
var B = function() {
    this.name = "B"
}

var a = A()
console.log(Object.getPrototypeOf(a) == B.prototype) // true


var C = function() {
    return new C()
}
var c = C() //

the personal confusion is why returning your own instance in one constructor will show a stack overflow, but there is no problem returning instances of other constructors.

in addition, as far as I understand, whether the constructor returns its own instance is somewhat similar to recursion , so it returns an error, but what is returned is that an instance object should not continue to make its own calls, so how to understand it? I can"t figure it out all the time.

I hope there are seniors who can give us some advice. Thank you!

Constructor prototype front-end javascript

Mar.06,2021

you already know the answer, you might as well try this

let C = function(n) {
  console.log(n);
  return new C(n + 1);
}

let c = new C(0);

I don't think it's strange, but of course you can specify that if the constructor of a class tries to instantiate itself with the new keyword, instantiate it with an empty constructor.

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