how to use this keyword in javascript in arrow function of object code example

Example 1: javascript return object in arrow function

const func = () => ({ foo: "bar" });
console.log(func()); // { foo: "bar" }

Example 2: javascript this inside arrow function

function A() {
  this.val = "Error";
  (function() {
    this.val = "Success";
  })();
}

function B() {
  this.val = "Error";
  (() => {
    this.val = "Success";
  })();
}

var a = new A();
var b = new B();
a.val // "Error"
b.val // "Success"