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docs: add watchEffect notes #2596

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docs: add watchEffect notes #2596

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ddd7647
docs: add `watchEffect` notes
Alfred-Skyblue Dec 8, 2023
d5fc7f9
docs: update watchEffect
Alfred-Skyblue Dec 12, 2023
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3 changes: 3 additions & 0 deletions src/api/reactivity-core.md
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Expand Up @@ -231,6 +231,9 @@ Takes an object (reactive or plain) or a [ref](#ref) and returns a readonly prox

Runs a function immediately while reactively tracking its dependencies and re-runs it whenever the dependencies are changed.

:::info Usage Note
`watchEffect` will execute immediately upon initialization. During this initial execution, `watchEffect` will collect dependencies accessed during the first run. When the dependencies change, `watchEffect` will be re-executed. In subsequent executions, `watchEffect` will only collect dependencies accessed in the previous run, thus avoiding unnecessary executions and improving performance.
:::
- **Type**

```ts
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