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ampersand-class-extend

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ampersand-class-extend

JS class extension tool for enabling easily extending prototype with multiple objects.

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ampersand-class-extend

Helper function for setting up prototype chains for subclasses.

Largely copied out of Backbone, but modified to enable extending a prototype with multiple mixins at once.

install

npm install ampersand-class-extend

usage

Your base object module might look something like this:

var extend = require('ampersand-class-extend');


// your base object
function YourConstructor() {}

// simply attach it directly to the object constructor
YourConstructor.extend = extend;

// export it
module.exports = YourConstructor;

Then in a file using said constructor:

var YourConstructor = require('./your-constructor');
var mixinMethods = require('some-other-methods');
var otherMixinMethods = require('even-more-methods');


// Nowe we add some more stuff and export a modified constructor 
// (we can pass in as many other objects containing methods as we want).
module.exports = YourConstructor.extend(mixinMethods, otherMixinMethods, {
    yetAnotherMethod: function () {
        // do something
    }
});

Now, when creating instances of the subclass, they'll have all the mixins while still passing instanceof checks for both the parent and the subclass.

credit

Most of the credit goes to Jeremy Ashkenas and the other authors of Backbone.js.

Modified to be standalone Common JS and to allow you to pass multiple extend objects by @HenrikJoreteg.

license

MIT

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Package last updated on 25 May 2016

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