@operative/di
v1.2.1
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TypeScript dependency injection
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TypeScript Dependency Injection
npm package: @operative/di
Dependency Injection for TypeScript-based projects.
Requirements
In tsconfig.json property "target" (ECMAScript target version) more or equal "es2015"
In tsconfig.json must be set to "true" properties:
- experimentalDecorators
- emitDecoratorMetadata
Annotations
- @Component - all classes available for injection should be marked with this annotation
- @Singleton - create only one instance of the class and use it in all injections
Usage
import assert from "assert"
import { Component, Injector, Singleton } from "@operative/di";
@Component()
@Singleton()
class A {}
@Component()
class B {}
@Component()
class InjectMe {
constructor(public aClass: A,
public bClass: B) {
}
}
const injected = Injector.resolve<InjectMe>(InjectMe);
assert.strictEqual(injected.aClass instanceof A, true);
assert.strictEqual(injected.bClass instanceof B, true);