Dependency Injection Promise based
This library work both on node and browser.
$ npm install --save-dev dip.js
As of now this library has no dependency as long as your browser or environment support promise.
For now the best way to understand what's the purpose of this micro library is to have a look at tests.
The idea of Dip is to provide a way to inject dependency by sing promise. In asynchronous context is not always possible to guarantee that all dependencies are already defined. I know it does break a little the dependency injection pattern, but the idea here is to use the service locator pattern to ask for a dependency and defer any logic depending on it while this is resolve. By using promise, it supports resolution or rejection status, but it's up to the developer to make his/her code to handle the possible rejection of a dependency.
An example is as simple as :
dip.getItem('dependency').then(resolve, reject);with resolve and reject two functions to handle the possible status of the promise.
The syntax being a promise any of the following syntaxes can be used:
// using then(resolve, reject) form
dip.getItem('dependency').then(resolve, reject);
// using then().catch() form
dip.getItem('dependency').then(resolve).catch(reject);
// possible of multiple chaining
dip.getItem('dependency')
.then(resolve)
.then(resolve2)
.catch(reject);See any good article on promises.
More to come.
TODO
- add more example
- complete documentation
- enable Store override
- add support for setting promise if not supported natively
MIT