can I add non static method to external class using prototypes?-CodePudding

Can I add using prototypes function for a class instance?

so I'll be able to use this or __proto__ keyword inside my method, for example:

class PersonClass {
  name: string;

  constructor(name: string) {
    this.name = name;
  }

  sayHello() {
    console.log(`hello, my name is ${this.name} and I'm a ${this.type}`);
  }
}

PersonClass.prototype.type = "human";
PersonClass.prototype.PrintType = () => {
  console.log(`I'm a ${PersonClass.prototype.type}`);
};

const aria = new PersonClass("Ned Stark");
aria.sayHello();
aria.PrintType();

this code works of course, but I wish to add something like

PersonClass.prototype.SayHello2 = () => {
  console.log(this.name, caller.__proto__.name);
};

which of course fails.

is it even possible?

CodePudding user response：

Your SayHello2 should be a non-arrow function to access the properties you are looking for:

PersonClass.prototype.SayHello2 = function () {
  console.log(this.name, this.type);
};

which produces:

"Ned Stark",  "human"

Don't forget you also have access to the constructor property of an instance as well, allowing you to access everything associate with your classes.

CodePudding user response：

This should works:

    PersonClass.prototype.SayHello2 = function() {
      console.log(this.name);
    };

    aria.SayHello2(); // "Ned Stark"