The setup syntax sugar reports an error vue-router.mjs:3451 TypeError: Failed to fetch dynamically imported module:

When writing the setup directly on the script tag

Will report an errorvue-router.mjs:3451 TypeError: Failed to fetch dynamically imported module:

This is an error caused by setup syntax sugar. At this time, it can be solved by following the original writing method of vue3, export default{xxxxxx}

How to write setup syntax sugar in vue3:

<template>
  <button @click="test">测试</button>
</template>
    
<script setup lang="ts">
import {
    
     ref } from 'vue'
const a = ref(0);
const test = () => {
    
    
  console.log(a)
}

</script>
       
<style scoped></style>

Original normal writing:

<template>
    <div v-for="tag in tagList" :key="tag.id">
      <span>{
    
    {
    
     tag.tagName }}</span>
    </div>
</template>
    
<script lang="ts">
import {
    
     getTags } from '@/api/tag';
import {
    
     tag } from '@/types/api/tag';
import {
    
     onMounted, ref } from 'vue';

export default {
    
    
  name: "Labels",
  setup() {
    
    
    let tagList = ref<tag[]>([])
    //获取所有标签
    const getAllTags = async () => {
    
    
      const res = await getTags();
      tagList.value = res.data;
    }
    onMounted(() => {
    
    
      getAllTags();
    })
      
    return {
    
    
      tagList,
    }

  }
}
</script>   
<style scoped>
</style>

After changing to the original writing method, the error will no longer appear! ! ! It seems I can’t be lazy~