<template>
  <title>陈尼克</title>
  <div id="app">
     {{ count }} {{ object.foo }}
  </div>
</template>

<script>
//import { defineProps, reactive } from 'vue'

import { createApp, ref, reactive } from 'vue';
//const { createApp, ref, reactive } = Vue;
//const App = {
  export default {
  setup() {
    const count = ref("0")
    const object = reactive({
      object: "foo",
    });
    return {
      count,
      object,
    };
  },
};
</script>
<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

这样就出来了，我也不知道怎么出来的，object与foo与bar啥关系

<template>
  <title>陈尼克</title>
  <div id="app">
     {{ count }} {{ object.foo }}
  </div>
</template>

<script>
//import { defineProps, reactive } from 'vue'

import { createApp, ref, reactive } from 'vue';
//const { createApp, ref, reactive } = Vue;
//const App = {
  export default {
  setup() {
    const count = ref("0")
    const object = reactive({
      foo: "bar",
    });
    return {
      count,
      object,
    };
  },
};
</script>
<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>