Function optional

optional<Instance extends object>(
Class: Constructor<Instance>,
name?: string,
): Instance | undefined
Injects the instance associated with the given class, or undefined if the class is not registered in the container.

Throws an error if a circular dependency is detected. Use optionalBy if resolving circular dependencies is necessary.
Type Parameters
- Instance extends object
Parameters
- Class: Constructor<Instance>
- Optionalname: string
Returns Instance | undefined
- Defined in optional.ts:11
optional<Value>(token: Token<Value>, name?: string): Value | undefined
Injects the value associated with the given token, or undefined if the token is not registered in the container.

Throws an error if a circular dependency is detected. Use optionalBy if resolving circular dependencies is necessary.
Type Parameters
- Value
Parameters
- token: Token<Value>
- Optionalname: string
Returns Value | undefined
- Defined in optional.ts:20