javascript-dual-inherit v1.0.0

Introduction

Creates a Javascript prototypical inheritance from one class to another with added features.

Firstly a callback is made during the construction cycle to allow the injection of additional parameters into a super class constructor. If supplied the callback is responsible for calling the super class constructor and is passed a reference to it.

Secondly the prototype chain of both classes is merged into the resulting prototype. This includes the mapping of property descriptors from both.

Installation

npm install --save javascript-dual-inherit

Usage

import inherits from 'javascript-dual-inherit'

...

var someImportantModuleParameter = "secret";

var MyObject = inherits(function MyObject(someParameter) {
    this.param = someParameter;
}, SomeOtherClass, (Super, instance, someParameter) =>{
    Super.call(instance, someImportantModuleParameter, someParameter);
});
 
...
 
var myObjectInstance = new MyObject("Hello");

Parameters

inherits(ClassConstructor, SuperClass, [callback])

ClassConstructor the sub class

SuperClass the super class to inherit from

callback an optional callback function which is passed a series of parameters:

function callback(Super, instance, param1, param2, param3...)

Super the super class to call

instance the newly constructed instance that should be initialized by the superclass

param1 etc, the parameters used to call the sub class constructor