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Bokep
- Viewed 285k times226edited Mar 14, 2023 at 5:16
If you take a look at watch typings here it makes it clear the first argument of watch could be an array, function or Ref<T>
props passed to the setup function are a reactive object (likely by readonly(reactive()), it's properties are getters. So what ...
watch(() => props.selected, (first, second) => {console.log("Watch props.selected function called with args:",first,second);});Here the 1st function is executed immediately by Vue to collect dependencies (to know what should trigger the callback) and 2nd function is the callback itself.
Content Under CC-BY-SA license How to watch props change with Vue Composition API / Vue 3?
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