Output value within Observable.
A readonly tuple of all dependencies.
A pure function that, when applied to an Observable, returns an Observable.
An dependency array with fixed length. When one of the dependencies
changes the Observable in init will emit an array of all the dependencies.
Same as [[useObservable]] excepts using
useLayoutEffect.Accepts a function that returns an Observable. Optionally accepts an array of dependencies which will be turned into Observable and be passed to the
initfunction.React functional components are called many times during their lifecycle. Create or transform Observables in
initfunction so that the operations won't be repeatedly performed.⚠ Note:
useLayoutObservablewill callinitonce and always return the same Observable. It is not safe to access closure (except other Observables) directly insideinit. You should use ref or pass them as dependencies through the second argument.⚠ Note: Due to rules of hooks you can either offer or omit the dependencies array but do not change to one another during Component's life cycle. The length of the dependencies array must also be fixed.