What does 'this' refer to in this peace of the code?-CodePudding

I am reading a code like below:

export abstract class CustomError extends Error {
  abstract statusCode: number;

  constructor(message: string) {
    super(message);

    Object.setPrototypeOf(this, CustomError.prototype);

  }

  abstract serializeErrors(): { message: string; field?: string }[];
}

I can't understand what does this refer to? I think in this case this should be equal to CustomError, and if so, this expression would be meaning less to me:

Object.setPrototypeOf(this, CustomError.prototype);

Because it's like:

Object.setPrototypeOf(this, this.prototype);

And it assigns the class's prototype to an object of same class's prototype that I can't understand the reason? I mean this should have this prototype itself by default, shouldn't it?

CodePudding user response：

this reffers to the variable itself. If I made a class,

class thing{
         constructor() {console.log(this)}
}
new thing();

"this" reffers to the class.

CodePudding user response：

Just like it says in the code

 Object.setPrototypeOf(this, CustomError.prototype);

this represents or refers to an object in javascript