TypeDI is a dependency injection tool for TypeScript and JavaScript. With it you can build well-structured and easily testable applications in Node or in the browser.
Main features includes:
Note: This installation guide is for usage with TypeScript, if you wish to use TypeDI without Typescript please read the documentation about how get started.
To start using TypeDI install the required packages via NPM:
npm install typedi reflect-metadata
Import the reflect-metadata package at the first line of your application:
import 'reflect-metadata'; // Your other imports and initialization code // comes here after you imported the reflect-metadata package!
As a last step, you need to enable emitting decorator metadata in your Typescript config. Add these two lines to your tsconfig.json file under the compilerOptions key:
"emitDecoratorMetadata": true, "experimentalDecorators": true,
Now you are ready to use TypeDI with Typescript!
import { Container, Service } from 'typedi';
@Service()
class ExampleInjectedService {
printMessage() {
console.log('I am alive!');
}
}
@Service()
class ExampleService {
constructor(
// because we annotated ExampleInjectedService with the @Service()
// decorator TypeDI will automatically inject an instance of
// ExampleInjectedService here when the ExampleService class is requested
// from TypeDI.
public injectedService: ExampleInjectedService
) {}
}
const serviceInstance = Container.get(ExampleService);
// we request an instance of ExampleService from TypeDI
serviceInstance.injectedService.printMessage();
// logs "I am alive!" to the console
The detailed usage guide and API documentation for the project can be found:
./docs folder of the repositoryPlease read our contributing guidelines to get started.
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