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Configuration is applied to extension points, extensions, and services.

Taking the ChineseGreeter as an example, we can inject the configuration to specify the greeting phrase or the name should come first.

/**
 * A greeter implementation for Chinese.
 */
@bind(asGreeter)
export class ChineseGreeter implements Greeter {
  language = 'zh';
  constructor(
    /**
     * Inject the configuration for ChineseGreeter
     */
    @config()
    private options: ChineseGreeterOptions = {nameFirst: true},
  ) {}

The code snippet below shows two examples:

  1. ChineseGreeter that allows the style configuration
  2. GreetingService that takes some options
export class GreetingService {
  constructor(
    /**
     * Inject a getter function to fetch greeters (bindings tagged with
     * `{[CoreTags.EXTENSION_POINT]: GREETER_EXTENSION_POINT_NAME}`)
     */
    @extensions()
    private getGreeters: Getter<Greeter[]>,
    /**
     * An extension point should be able to receive its options via dependency
     * injection.
     */
    @config()
    public readonly options?: GreetingServiceOptions,
  ) {}
}

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