vue3之Suspense加载异步数据的使用

<template>
  <Suspense>
    <template #default>
      <ProductList></ProductList>
    </template>
    <template #fallback> <div>loading...</div> </template>
  </Suspense>
</template>

<script setup lang="ts" name="Cart">
import ProductList from "./ProductList.Vue";
</script>
<style lang="sCSS" scoped></style>

<!-- -->
<template>
  <div v-if="data">
    ProductList
    <div>data父 - {{ data }}</div>
  </div>
  <div v-if="err">
    {{ err }}
  </div>
</template>

<script setup lang="ts" name="ProductList">
import { ref } from "vue";

const data = ref<any>(null);
const flag = false;
const err = ref(null);
function aaa() {
  return new Promise((resolve) => {
    setTimeout(() => {
      if (!flag) {
        return resolve({ code: 0, errORMsg: "参数错误" });
      }
      return resolve({
        code: 200,
        data: {
          result: 42,
        },
      });
    }, 3000);
  });
}
const res = await aaa();
console.log(res);

if (res.code === 200) {
  data.value = res.data.result;
} else {
  data.value = "";
  err.value = res.errorMsg;
}
</script>
<style lang="scss" scoped></style>