https://github.com/zhang740/power-di

A lightweight Dependency Injection library.
https://github.com/zhang740/power-di

Last synced: 3 months ago
JSON representation

A lightweight Dependency Injection library.

• Host: GitHub
• URL: https://github.com/zhang740/power-di
• Owner: zhang740
• License: mit
• Created: 2017-03-16T09:26:50.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2024-08-13T02:36:33.000Z (6 months ago)
• Last Synced: 2024-10-14T07:54:05.199Z (4 months ago)
• Language: TypeScript
• Size: 407 KB
• Stars: 174
• Watchers: 1
• Forks: 9
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • Changelog: History.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-nodejs - power-di - A lightweight Dependency Injection library.  (Repository / Inversion of control / Dependency Injection (Ioc/DI))

README

        
# Power DI

[![CI](https://img.shields.io/travis/zhang740/power-di.svg?style=flat-square)](https://travis-ci.org/zhang740/power-di)

[![Coverage](https://img.shields.io/coveralls/zhang740/power-di.svg?style=flat-square)](https://coveralls.io/github/zhang740/power-di)

[![Version](https://img.shields.io/npm/v/power-di.svg?style=flat-square)](https://www.npmjs.com/package/power-di)

[![License](https://img.shields.io/npm/l/power-di.svg?style=flat-square)](https://github.com/zhang740/power-di/blob/master/LICENSE)

A lightweight Dependency Injection library. Using es6 and other features, remove unnecessary concepts, easy and convenient to use.

## Install

```shell

npm i power-di --save

```

## Example

### a simple example

```ts

import { IocContext } from 'power-di';

class AService { }

// default instance, you can also new IocContext to get a instance.

const context = IocContext.DefaultInstance;

context.register(AService);

const aService = context.get(AService); // a instance of AService

```

### inject with key

```ts

class AService { }

const context = IocContext.DefaultInstance;

context.register(AService, 'XService'); // key need a string or class, e.g super class or whatever class.

context.get('XService');

```

### use with decorators

```ts

const context = new IocContext();

@injectable()

class NRService { }

@injectable()

class LITestService {

  @inject()

  public testService: NRService;

}

const test = context.get(LITestService);

```

### collect impl or extends of some interface/base class

```ts

class A { }

@classInfo()

class B extends A { }

@classInfo()

class C extends A { }

@injectable()

class LITestService {

  @imports({ type: A })

  public testService: A[];

}

const test = context.get(LITestService); // test.testService as A[];

```

### use in react

```tsx

const context = new IocContext;

class NRService { }

context.register(NRService);

class TestComponent extends Component<{}, {}> {

  @inject()

  service: NRService;

  componentDidMount() {

    t.true(this.service instanceof NRService);

  }

  render(): any {

    return null;

  }

}

create(

  

    

  

);

```

## Class Loader

Power DI introduced the concept of class loader. We can customize the find rule of ioc.

#### [See the test case for details.](https://github.com/zhang740/power-di/tree/master/test)