# mpx/valid-setup-define-expose
setup-script模式下，template中使用的变量必须导出
- ⚙️ 这条规则包含在
"plugin:mpx/composition-api-essential"。
# 📖 规则详情
<script setup>
import { ref } from '@mpx/core'
const count = ref(0)
const num = ref(0)
const inc = () => {
count.value++
}
const show = true
defineExpose({
show,
num,
inc
})
</script>
<template>
<!-- ✓ GOOD -->
<view wx:if="{{show}}" num="{{num}}" bindtap="inc" />
<!-- ✗ BAD -->
<view wx:if="{{noexpose}}" bindtap="method">
{{ error }}
</view>
</template>
# 🔧 选项
无.