class BaseClass { // ... ваш код } class MyClass extends BaseClass { result(a, b) { this.a = a; this.b = b; return 100 - this.a + this.b; } } let m = new MyClass(); m.result(10, 20) === 90; m.result(20, 10) === 110;
Ответ:
class BaseClass { constructor(a, b) { this.result = (a, b) => { this.a = b; this.b = a; return 100 - this.a + this.b; } } } class MyClass extends BaseClass { result(a, b) { this.a = a; this.b = b; return 100 - this.a + this.b; } } let m = new MyClass(); console.log(m.result(10, 20) === 90); console.log(m.result(20, 10) === 110);