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fix(watch): watched previous values can't be destructure on first fire. #727

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merged 2 commits into from Jun 17, 2021
Merged

fix(watch): watched previous values can't be destructure on first fire. #727

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91a7db9
fix(watch): watched previous values can't be destructure on first fire
ygj6 Jun 8, 2021
2dc7145
update the implementation mode
ygj6 Jun 8, 2021
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1 change: 1 addition & 0 deletions src/apis/watch.ts
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Expand Up @@ -329,6 +329,7 @@ function createWatcher(
// The subsequent callbacks will redirect to `callback`.
let shiftCallback = (n: any, o: any) => {
shiftCallback = originalCallback
o = isArray(n) ? [] : undefined
applyCb(n, o)
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}
callback = (n: any, o: any) => {
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6 changes: 3 additions & 3 deletions test/apis/watch.spec.js
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Expand Up @@ -457,7 +457,7 @@ describe('api/watch', () => {
template: `<div>{{obj1.a}} {{obj2.a}}</div>`,
}).$mount()
expect(spy).toBeCalledTimes(1)
expect(spy).toHaveBeenLastCalledWith([1, 2], undefined)
expect(spy).toHaveBeenLastCalledWith([1, 2], [])
obj1.a = 2
obj2.a = 3

Expand Down Expand Up @@ -491,7 +491,7 @@ describe('api/watch', () => {
template: `<div>{{a}} {{b}}</div>`,
}).$mount()
expect(spy).toBeCalledTimes(1)
expect(spy).toHaveBeenLastCalledWith([1, 1], undefined)
expect(spy).toHaveBeenLastCalledWith([1, 1], [])
vm.a = 2
expect(spy).toBeCalledTimes(1)
waitForUpdate(() => {
Expand Down Expand Up @@ -553,7 +553,7 @@ describe('api/watch', () => {
},
})
expect(spy).toBeCalledTimes(1)
expect(spy).toHaveBeenLastCalledWith([1, 1], undefined)
expect(spy).toHaveBeenLastCalledWith([1, 1], [])
vm.a = 2
expect(spy).toBeCalledTimes(2)
expect(spy).toHaveBeenLastCalledWith([2, 1], [1, 1])
Expand Down