ValueProvider - Angular

Configures the Injector to return a value for a token.

API

interface ValueProvider extends ValueSansProvider {
  provide: any;
  multi?: boolean | undefined;
  override useValue: any;
}

provide

any

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

multi

boolean | undefined

When true, 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.

useValue

any

The value to inject.

Usage Notes

Example

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

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

Multi-value example

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

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