+34
-2
lines changedFilter options
+34
-2
lines changed Original file line number Diff line number Diff line change
@@ -944,4 +944,28 @@ describe('api: watch', () => {
944 944
await nextTick()
945 945
expect(spy).toHaveBeenCalledTimes(2)
946 946
})
947 + 948 +
it('watching sources: ref<any[]>', async () => {
949 +
const foo = ref([1])
950 +
const spy = jest.fn()
951 +
watch(foo, () => {
952 +
spy()
953 +
})
954 +
foo.value = foo.value.slice()
955 +
await nextTick()
956 +
expect(spy).toBeCalledTimes(1)
957 +
})
958 + 959 +
it('watching multiple sources: computed', async () => {
960 +
let count = 0
961 +
const value = ref('1')
962 +
const plus = computed(() => !!value.value)
963 +
watch([plus], () => {
964 +
count++
965 +
})
966 +
value.value = '2'
967 +
await nextTick()
968 +
expect(plus.value).toBe(true)
969 +
expect(count).toBe(0)
970 +
})
947 971
})
Original file line number Diff line number Diff line change
@@ -171,13 +171,17 @@ function doWatch(
171 171 172 172
let getter: () => any
173 173
let forceTrigger = false
174 +
let isMultiSource = false
175 + 174 176
if (isRef(source)) {
175 177
getter = () => (source as Ref).value
176 178
forceTrigger = !!(source as Ref)._shallow
177 179
} else if (isReactive(source)) {
178 180
getter = () => source
179 181
deep = true
180 182
} else if (isArray(source)) {
183 +
isMultiSource = true
184 +
forceTrigger = source.some(isReactive)
181 185
getter = () =>
182 186
source.map(s => {
183 187
if (isRef(s)) {
@@ -265,7 +269,7 @@ function doWatch(
265 269
return NOOP
266 270
}
267 271 268 -
let oldValue = isArray(source) ? [] : INITIAL_WATCHER_VALUE
272 +
let oldValue = isMultiSource ? [] : INITIAL_WATCHER_VALUE
269 273
const job: SchedulerJob = () => {
270 274
if (!runner.active) {
271 275
return
@@ -276,7 +280,11 @@ function doWatch(
276 280
if (
277 281
deep ||
278 282
forceTrigger ||
279 -
hasChanged(newValue, oldValue) ||
283 +
(isMultiSource
284 +
? (newValue as any[]).some((v, i) =>
285 +
hasChanged(v, (oldValue as any[])[i])
286 +
)
287 +
: hasChanged(newValue, oldValue)) ||
280 288
(__COMPAT__ &&
281 289
isArray(newValue) &&
282 290
isCompatEnabled(DeprecationTypes.WATCH_ARRAY, instance))
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