W3cubDocs

/Angular 7

ValueProvider

interface

Configures the Injector to return a value for a token.

See more...

interface ValueProvider extends ValueSansProvider {
  provide: any
  multi?: boolean
}

Description

For more details, see the "Dependency Injection Guide".

Properties

Property Description
provide: any

An injection token. (Typically an instance of Type or InjectionToken, but can be any).

multi?: boolean

If true, then injector returns an array of instances. This is useful to allow multiple providers spread across many files to provide configuration information to a common token.

Usage notes

Example

const injector = Injector.create([{provide: String, useValue: 'Hello'}]);

expect(injector.get(String)).toEqual('Hello');

Multi-value example

const locale = new InjectionToken<string[]>('locale');
const injector = Injector.create([
  {provide: locale, multi: true, useValue: 'en'},
  {provide: locale, multi: true, useValue: 'sk'},
]);

const locales: string[] = injector.get(locale);
expect(locales).toEqual(['en', 'sk']);

© 2010–2019 Google, Inc.
Licensed under the Creative Commons Attribution License 4.0.
https://v7.angular.io/api/core/ValueProvider