private-proxy

Features

• Convert any object into one that supports private, immutable properties.
• Leverages the Proxy object.
• Objects retain original prototype.
• Objects are inspectable, and non-private properties are mutable/inspectable.

Getting Started

yarn install private-proxy

const pp = require('private-proxy');

const myObject = pp({});

myObject.dog = 'Fido';
console.log(myObject);
//=> {}

console.log(myObject.dog);
//=> 'Fido'

Examples

Works with any objects, included classes

const pp = require('private-proxy');

class Person {
  constructor(name) {
    this.name = name; //Non-private property
  }
}

const me = pp(new Person('Rob')); //Any properties defined hereafter are private

Object keeps prototype

console.log(me);
//=> Person { name: 'Rob' }

Any property not defined before conversion can be set, but not inspected

me.age = 30; // me.age is a private property as it was not defined prior to conversion
console.log(me);
//=> Person { name: 'Rob' }

But can be accessed directly

console.log(me.age);
//=> 30

Non-private properties remain mutable

me.name = 'Joey';
console.log(me);
//=> Person { name: 'Joey' }

Private properties are immutable

me.age = 35;
console.log(me.age);
//=> 30

Undefined properties return undefined

console.log(me.dog);
//=> undefined