ValueProvider
interface
Configures the Injector
to return a value for a token.
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']);
Jump to details