Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

fix(watch): for immediate watch with single source, ensure cb is called with undefined as oldValue (fix: #7074) #7075

Merged
merged 1 commit into from Nov 9, 2022
Merged

fix(watch): for immediate watch with single source, ensure cb is called with undefined as oldValue (fix: #7074) #7075

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
2 changes: 1 addition & 1 deletion packages/runtime-core/__tests__/apiWatch.spec.ts
View file
Open in desktop
Expand Up @@ -745,7 +745,7 @@ describe('api: watch', () => {
const state = ref()
const spy = jest.fn()
watch(() => state.value, spy, { immediate: true })
expect(spy).toHaveBeenCalled()
expect(spy).toHaveBeenCalledWith(undefined, undefined, expect.any(Function))
state.value = 3
await nextTick()
expect(spy).toHaveBeenCalledTimes(2)
Expand Down
9 changes: 5 additions & 4 deletions packages/runtime-core/src/apiWatch.ts
View file
Open in desktop
Expand Up @@ -333,10 +333,11 @@ function doWatch(
callWithAsyncErrorHandling(cb, instance, ErrorCodes.WATCH_CALLBACK, [
newValue,
// pass undefined as the old value when it's changed for the first time
oldValue === INITIAL_WATCHER_VALUE ||
(isMultiSource && oldValue[0] === INITIAL_WATCHER_VALUE)
? []
: oldValue,
oldValue === INITIAL_WATCHER_VALUE
? undefined
: (isMultiSource && oldValue[0] === INITIAL_WATCHER_VALUE)
? []
: oldValue,
onCleanup
])
oldValue = newValue
Expand Down