Function asInstance

asInstance<C extends AnyConstructor>(
value: unknown,
ctor: C,
): Optional<InstanceType<C>>
Narrows an unknown value to an instance of constructor type T if it is type-compatible, or returns undefined otherwise.
Type Parameters
- C extends AnyConstructor
Parameters
- value: unknown
  The value to test.
- ctor: C
Returns Optional<InstanceType<C>>
- Defined in narrowing/as.ts:146
asInstance<C extends AnyConstructor>(
    value: unknown,
    ctor: C,
    defaultValue: InstanceType<C>,
): InstanceType<C>
Narrows an unknown value to an object if it is type-compatible, or returns the provided default otherwise.
Type Parameters
- C extends AnyConstructor
Parameters
- value: unknown
  The value to test.
- ctor: C
- defaultValue: InstanceType<C>
  The default to return if value was undefined or of the incorrect type.
Returns InstanceType<C>
- Defined in narrowing/as.ts:153