this keyword

this.value = 'D';

const object = {
  value: 'A',
  methodA: () => {
    console.log(this.value);
  },
  methodB: function () {
    console.log(this.value);
  },
};

const context = {
  value: 'B',
};

object.methodA();
object.methodB();
object.methodA.call(context);
object.methodB.call(context);
object.methodA.bind({ value: 'C' }).call(context);
object.methodB.bind({ value: 'E' }).call(context);