Function useDerived

useDerived<TSrcValue, TValue>(val$, transform, eagerOrConfig?): TValue
Accepts a val from anywhere and returns the latest derived value. Re-rendering is triggered when the derived value changes.
Type Parameters
- TSrcValue = any
- TValue = any
Parameters
- val$: ReadonlyVal<TSrcValue>
  A val of value
- transform: DerivedValTransform<TSrcValue, TValue>
  A pure function that takes an input value and returns a new value.
- Optional eagerOrConfig: boolean | ValConfig<TValue>
  ValConfig of Val or just the eager. Default true.
Returns TValue
the derived value
- Defined in use-derived.ts:41
useDerived<TSrcValue, TValue>(val$, transform, eagerOrConfig?): undefined | TValue
Accepts a val from anywhere and returns the latest derived value. Re-rendering is triggered when the derived value changes.
Type Parameters
- TSrcValue = any
- TValue = any
Parameters
- val$: undefined | ReadonlyVal<TSrcValue>
  A val of value
- transform: DerivedValTransform<TSrcValue, TValue>
  A pure function that takes an input value and returns a new value.
- Optional eagerOrConfig: boolean | ValConfig<TValue>
  ValConfig of Val or just the eager. Default true.
Returns undefined | TValue
the derived value, or undefined if val is undefined
- Defined in use-derived.ts:41