primap

Primap: Private Members WeakMap

Use weakmaps to provide truly private properties to your classes.

This is a very succint implementation and abstraction

Usage:

Import primap in your class definition module and start using it. The important step is to bind it to your object reference before setting any properties on _p():

// var _p = require('primap');
import _p from 'primap';
 
Class Hello {
  constructor(from, to) {
    _p().bind(this); // important!
 
    // setting as property access
    _p().from = from;
 
    // setting as params for dynamic prop names for example
    _p('to', to);
  }
 
  get greeter() {
    return _p().from;
  }
 
  sayIt() {
    return `Hello darling! I know your name is ${_p().to}, I'm ${this.greeter}`
  }
}
 
// module.exports = Hello;
export default Hello;

Import your class somewhere else

// var Hello = require('./Hello');
import Hello from './Hello';
 
const hello = new Hello('John', 'Mary');
 
hello.sayIt(); // "Hello darling! I know your name is Mary, I'm John"
 
hello.from; // undefined