无法处理 <script setup></script> 的情况 ?

[xjArea]

使用 setup 的写法, Demo 就会报错了, 好像这种代码会被放到 scriptSetup 属性中, 而不是 script 里面 ?

<noscript type="vue-sfc" component="MyComponent" mount="#app">
<script setup>
	import {ref, } from 'vue';
	let count = ref(0);
</script>

<template>
	<button @click="count++">Count is: {{ count }}</button>
</template>

<style scoped>
	button {font-weight: bold;}
</style>
</noscript>

<div id="app"></div>
<script src="https://unpkg.com/noscript-sfc/index.js"></script>

# 错误信息
vue.esm-browser.js:1513 [Vue warn]: Cannot mutate <script setup> binding "count" from Options API.