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12 - 优化性能的指令 #2138

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@yzk656

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@yzk656
// 你的答案
<script setup>
import { ref } from "vue"

const count = ref(0)

setInterval(() => {
  count.value++
}, 1000)
</script>

<!--使他从不更新-->
<template>
  <span v-once>使它从不更新: {{ count }}</span>
</template>

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