How to use the injection-js.Optional function in injection-js
To help you get started, we’ve selected a few injection-js examples, based on popular ways it is used in public projects.
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Hotell / blogposts / 2018-06 / ts-react-di / src / app / core / logger.service.ts View on Github 
constructor(
@Optional()
@Inject(LoggerConfig)
protected config: Config
) {
if (!config) {
this.config = defaultConfig
}
}
protected logs: string[] = [] // capture logs for testingconstructor(
@Optional()
@Inject(MultiplyCounterConfig)
private config: MultiplyCounterConfig,
public logger: Logger
) {
super(logger)
this.config = config || defaultConfig
}
onIncrement() {injection-js
Dependency Injection library for JavaScript and TypeScript
