JavaScript dependency injection (DI) libraries

js-dependency-injection.md

Compilation + Runtime

• Angular

Runtime

Implementations based on reflect-metadata

• Inversify
• tsyringe
• typedi
• injection-js, an extraction of DI of Angular 4 and below, though it could be used without reflect-metadata, the syntax would be verbose

Implementations not based on reflect-metadata

• vscode
• redi
• @tencent/wedi
• service-compoistion, whose author also writes reflect-metadata

A benefit of using reflect-metadata is that you don't have to declare dependency for classes.

Say

@Injectable
class A {
  constructor(private readonly b: B) {}
}

The injector will know that A depends on B.

Compare to

class A {
  constructor(@Need(B) private readonly: B) {}
}

While investigating for a DI framework I've also seen https://github.com/exuanbo/di-wise, which relies on https://github.com/tc39/proposal-decorators only.