3 - 响应性丟失

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// 你的答案

`

function useCount() { const state = reactive({ count: 0, })

function update(value: number) { state.count = value }

return { ...toRefs(state), // count:toRef(state,'count'), update } }

// Ensure the destructured properties don't lose their reactivity const { count , update } = useCount()

`