Function TypeKey

Generates a base class for a class object that extends TypeKey<T>. Classes that extend the returned base class should have a private _: any property (or any other private member) to ensure the key has its own unique type.

Example

class NameKey extends TypeKey<string>() { private _: any }
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Example

with Scope:

class NameKey extends TypeKey<string>() {
  private _: any
  static scope = Singleton
}
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Example

with default instance:

class NameKey extends TypeKey({ default: Inject.value('Alice') }) {
  private _: any
}
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Example

with custom default:

class NameKey extends TypeKey({
  default: Inject.map(DataSource, ds => ds.getName()),
}) {
  private _: any
}
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Example

using the TypeKey:

Provide

const ct = Container.create().provide(NameKey, () => 'Alice')
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Request

const name: string = ct.request(NameKey)
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Use as dependency

const UserModule = Module(ct => ct
  .provide(User, { name: NameKey }, ({ name }) => new User(name))
)
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Use key operators

const UserModule = Module(ct => ct
  .provide(User, { name: NameKey.Lazy() }, ({ name }) => new User(name()))
)
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