useWatch
Watches one or more reactive data sources and invokes a callback function when the sources change.
代码演示
基础用法
Effects：foo
Basic usage
Watches reactive data sources and invokes a callback function when the sources change.
API
function useWatch<S, Next extends Prev, Prev = Next>( deps: Accessor<S> | AccessorArray<S>, fn: OnEffectFunction<S, undefined | NoInfer<Prev>, Next>, options?: OnOptions & { defer?: false },): voidfunction useWatch<S, Next extends Prev, Prev = Next>( deps: Accessor<S> | AccessorArray<S>, fn: OnEffectFunction<S, undefined | NoInfer<Prev>, Next>, options: OnOptions | { defer: true },): void
function useWatch<S, Next extends Prev, Prev = Next>( deps: Accessor<S> | AccessorArray<S>, fn: OnEffectFunction<S, undefined | NoInfer<Prev>, Next>, options?: OnOptions & { defer?: false },): voidfunction useWatch<S, Next extends Prev, Prev = Next>( deps: Accessor<S> | AccessorArray<S>, fn: OnEffectFunction<S, undefined | NoInfer<Prev>, Next>, options: OnOptions | { defer: true },): void
Params
| Property | Description | Type | Default |
|---|---|---|---|
| deps | reactive data sources | Accessor<S> | AccessorArray<S> | - |
| fn | callback | OnEffectFunction | - |
| options | options | OnOptions | - |