Class Merge
===========

Merge of additional (mixin) Classes into an primary (base) class


About
-----

Class Merge is a very small JavaScript library for Node.js environments,
providing just a single function for use in ECMAScript 6 class
inheritance. It aggregates/merges a base class and one or
more mixin classes into an aggregate class, which then is usually
subsequently used as the base class for another class.

Installation
------------

```shell
$ npm install @uci-utils/class-merge
```


Usage
-----

#### ECMAScript 6

requires using -r esm

```js
import merge from '@uci-utils/class-merge'

class Colored {
    initializer ()     { this._color = "white" }
    get color ()       { return this._color }
    set color (v)      { this._color = v }
}

class ZCoord {
    initializer ()     { this._z = 0 }
    get z ()           { return this._z }
    set z (v)          { this._z = v }
}

class Shape {
    constructor (x, y) { this._x = x; this._y = y }
    get x ()           { return this._x }
    set x (v)          { this._x = v }
    get y ()           { return this._y }
    set y (v)          { this._y = v }
}

class Rectangle extends merge(Shape, Colored, ZCoord) {}

var rect = new Rectangle(7, 42)
rect.z     = 1000
rect.color = "red"


Credits
-------

thx to aggregation 2015-2019  by Dr. Ralf S. Engelschall (http://engelschall.com/)