Piddly

The World's Smallest Dependency Injection Framework for JavaScript (unsubstantiated fact)!

Installation

npm install --save piddly

Usage

var piddly = require('piddly');

Define all of your objects and their dependencies in a readable manner using piddly.create...

var nodes = piddly.create({
    
    'BookRepository': function(nodes) {
        return new BookRepository(nodes('Database'));
    },

    'BookOrderRepository': function(nodes) {
        return new BookOrderRepository(nodes('Database'));
    },

    'Database': function(nodes) {
        return new MongoDBDatabase(nodes('MongoDBConfig'))
    },

    'BookOrderController': function(nodes) {
        return new BookOrderController(
            nodes('BookOrderRepository'),
            nodes('BookOrderViewManager')
        );
    },

    // ...

    'Application': function(nodes) {
        return new Application(nodes('ControllerRegistry'));
    }

});

To examine the example a bit closer...

The keys used will be the keys you can use to access the object you define using the nodes function.

The value must always be a function, this function should return your constructed object and should be free from any side-effects (i.e. no printing to the screen, sending orders for coffee or launching any missiles), it's good practice.

In your definition, you can access any other object that has been defined using the nodes function, this will always be provided as the first argument to your definition function.

If your object doesn't have any dependencies it is recommended to omit the nodes argument (it just makes it a bit more clear).

Then when you are ready to pull out the object you want, use the nodes function returned from create...

nodes('Application').run();

Issues

If you find any issues, please log them here

Contributing

If you want to contribute, fork this repository and remember to create pull requests for the neat stuff you want to contribute!