Type of the options argument to inject.
API
interface InjectOptions {
optional?: boolean | undefined;
skipSelf?: boolean | undefined;
self?: boolean | undefined;
host?: boolean | undefined;
}
optional
boolean | undefinedUse optional injection, and return null if the requested token is not found.
skipSelf
boolean | undefinedStart injection at the parent of the current injector.
self
boolean | undefinedOnly query the current injector for the token, and don't fall back to the parent injector if it's not found.
host
boolean | undefinedStop injection at the host component's injector. Only relevant when injecting from an element injector, and a no-op for environment injectors.