Package Exports
- class-extend
- class-extend/index.js
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (class-extend) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
Class.extend
Backbone like .extend inheritance helper for Node.js
Usage
You basically got two options:
// 1. Extend from the blank class
const Base = require('class-extend');
const Sub = Base.extend();
// 2. Add the .extend helper to a class
MyClass.extend = require('class-extend').extend;.extend()
.extend allow you to assign prototype and static methods.
If no constructor method is assigned, the parent constructor method will be called by default.
// Extend a class
const Sub = Parent.extend({
// Overwrite the default constructor
constructor() {},
// Sub class prototypes methods
hello() { console.log('hello'); }
}, {
// Constructor static methods
hey() { console.log('hey'); }
});
Sub.hey();
// LOG: hey
const instance = new Sub();
instance.hello();
// LOG: hello.__super__
Sub classes are assigned a __super__ static property pointing to their parent prototype.
const Sub = Parent.extend();
assert(Sub.__super__ === Parent.prototype);License
Copyright (c) 2025 Simon Boudrias
Licensed under the MIT license.