JS Proxy Stub

stub.js

class Pseudo {
  constructor(value) {
    return new Proxy({}, {
      get: () => value
    })
  }
}

const callable = new Pseudo(10)

console.log(callable.someMethod()) // 10
console.log(callable.anotherMethod()) // also 10

const plainObject = new Pseudo(10)

console.log(plainObject.someProp) // 10
console.log(plainObject.anotherProp) // guess what