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A module to protect private properties of classes

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[前端(javascript) 所属分类 前端(javascript) | 发布者 店小二04 | 时间 2016 | 作者 红领巾 ] 0人收藏点击收藏
private-class

A module to protect private properties of classes

This module allow to protect private properties of classes.

It works by creating a new prototype that wraps each methods of the original one.

On creation of a new instance of the wrapped prototype, a new instance of the original class is created and saved in a WeakMap.

Wrapped methods retrieve the original class instance from there and forward the call to its method.

Usage const priv = require('private-class'); const Person = priv(class Person { constructor(name, age) { this._name = name; this._age = age; } get age() { return this._age; } set age(value) { this._age = value; } name() { return this._name; } }); const p = new Person('Andrea', 40); // public function are visible console.log(typeof p.name); // <-- function // public getter & setter are visible p.age = 41; console.log(p.age); // <-- 41 // public function can read private fields console.log(p.name()); // <-- Andrea // extern code can not read private fields console.log(p._name); // <-- undefined console.log(p._age); // <-- undefined API const privateClass = (Class: function): function

Given a class, return a new class that doesn't allow to access private properties.

Install

With npm installed, run

$ npm install private-class See Also noffle/common-readme License

MIT

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