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refactor: remove old watch signature support

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This commit is contained in:
Evan You 2020-02-25 18:57:41 -05:00
parent 52cc7e8231
commit 711d16cc65
1 changed files with 11 additions and 23 deletions
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34
packages/runtime-core/src/apiWatch.ts
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@ -82,20 +82,14 @@ export function watchEffect(
// initial value for watchers to trigger on undefined initial values // initial value for watchers to trigger on undefined initial values
const INITIAL_WATCHER_VALUE = {} const INITIAL_WATCHER_VALUE = {}
// overload #1: simple effect // overload #1: single source + cb
export function watch(
effect: WatchEffect,
options?: BaseWatchOptions
): StopHandle
// overload #2: single source + cb
export function watch<T, Immediate extends Readonly<boolean> = false>( export function watch<T, Immediate extends Readonly<boolean> = false>(
source: WatchSource<T>, source: WatchSource<T>,
cb: WatchCallback<T, Immediate extends true ? (T | undefined) : T>, cb: WatchCallback<T, Immediate extends true ? (T | undefined) : T>,
options?: WatchOptions<Immediate> options?: WatchOptions<Immediate>
): StopHandle ): StopHandle
// overload #3: array of multiple sources + cb // overload #2: array of multiple sources + cb
// Readonly constraint helps the callback to correctly infer value types based // Readonly constraint helps the callback to correctly infer value types based
// on position in the source array. Otherwise the values will get a union type // on position in the source array. Otherwise the values will get a union type
// of all possible value types. // of all possible value types.
@ -110,24 +104,18 @@ export function watch<
// implementation // implementation
export function watch<T = any>( export function watch<T = any>(
effectOrSource: WatchSource<T> | WatchSource<T>[] | WatchEffect, source: WatchSource<T> | WatchSource<T>[],
cbOrOptions?: WatchCallback<T> | WatchOptions, cb: WatchCallback<T>,
options?: WatchOptions options?: WatchOptions
): StopHandle { ): StopHandle {
if (isFunction(cbOrOptions)) { if (__DEV__ && !isFunction(cb)) {
// watch(source, cb) warn(
return doWatch(effectOrSource, cbOrOptions, options) `\`watch(fn, options?)\` signature has been moved to a separate API. ` +
} else { `Use \`watchEffect(fn, options?)\` instead. \`watch\` now only ` +
// TODO remove this in the next release `supports \`watch(source, cb, options?) signature.`
__DEV__ && )
warn(
`\`watch(fn, options?)\` signature has been moved to a separate API. ` +
`Use \`watchEffect(fn, options?)\` instead. \`watch\` will only ` +
`support \`watch(source, cb, options?) signature in the next release.`
)
// watch(effect)
return doWatch(effectOrSource, null, cbOrOptions)
} }
return doWatch(source, cb, options)
} }
function doWatch( function doWatch(