bound.js

function bound() {
  return (target, key, descriptor) => {
    const symbol = Symbol(key);
    const { enumerable, configurable, value } = descriptor;
    return {
      enumerable,
      configurable,
      get() {
        let fn = this[symbol];
        if (fn === undefined) {
          this[symbol] = fn = value.bind(this);
        }
        return fn;
      }
    }
  }
}

function applyDecorator(target, key, decorator) {
  let descriptor = Object.getOwnPropertyDescriptor(target, key);
  Object.defineProperty(target, key, decorator()(target, key, descriptor));
}

class A {
  perform(x) {
    console.log(`A.perform(${x})`);
  }
}

applyDecorator(A.prototype, 'perform', bound);

class B extends A {
  perform(x) {
    super.perform(x);
    console.log('B.perform');
  }
}

applyDecorator(B.prototype, 'perform', bound);

const a = new A();
const b = new B();

const { perform: aPerform } = a;
const { perform: bPerform } = b;

aPerform(19);

bPerform(23);