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fix(watch): should not leak this.proxy to setup() #3603

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fix(watch): should not leak this.proxy to setup() #3603

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026e7cd
fix(watch): should not leak `this.proxy` to setup()
yangmingshan Apr 14, 2021
0567bda
fix(watch): remove unnecessary arguments
yangmingshan Apr 14, 2021
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18 changes: 17 additions & 1 deletion packages/runtime-core/__tests__/apiWatch.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -859,7 +859,7 @@ describe('api: watch', () => {
expect(instance!.effects![0].active).toBe(false)
})

test('this.$watch should pass `this.proxy` to watch source as the first argument ', () => {
test('this.$watch should pass `this.proxy` to watch source as the first argument', () => {
let instance: any
const source = jest.fn()

Expand All @@ -878,6 +878,22 @@ describe('api: watch', () => {
expect(source).toHaveBeenCalledWith(instance)
})

test('should not leak `this.proxy` to setup()', () => {
const source = jest.fn()

const Comp = defineComponent({
render() {},
setup() {
watch(source, () => {})
}
})

const root = nodeOps.createElement('div')
createApp(Comp).mount(root)

expect(source).toBeCalledWith(undefined)
})

// #2728
test('pre watcher callbacks should not track dependencies', async () => {
const a = ref(0)
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6 changes: 2 additions & 4 deletions packages/runtime-core/src/apiWatch.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -181,9 +181,7 @@ function doWatch(
} else if (isReactive(s)) {
return traverse(s)
} else if (isFunction(s)) {
return callWithErrorHandling(s, instance, ErrorCodes.WATCH_GETTER, [
instance && (instance.proxy as any)
])
return callWithErrorHandling(s, instance, ErrorCodes.WATCH_GETTER)
} else {
__DEV__ && warnInvalidSource(s)
}
Expand All @@ -193,7 +191,7 @@ function doWatch(
// getter with cb
getter = () =>
callWithErrorHandling(source, instance, ErrorCodes.WATCH_GETTER, [
instance && (instance.proxy as any)
arguments[3] && arguments[3].proxy
])
} else {
// no cb -> simple effect
Expand Down