结果：
1 setup是在props解析之后，beforeCreate执行之前进行调用
2 如果在setup中和外部同时调用一个生命周期函数，setup的生命周期函数 在外部的生命周期函数之前执行

<template>
  <div>setup的执行时机</div>
</template>
<script>
import { onMounted } from "@vue/runtime-core";
export default {
  data() {
    console.log("data");
    return {
      name: "111",
    };
  },
  methods: {
    changeName: () => {
      console.log("changeName");
      console.log(this.name);
    },
  },
  computed: {
    newName() {
      console.log("computed");
      console.log(this.name);
      return "123";
    },
  },

  beforeCreate() {
    console.log("beforeCreate");
  },
  created() {
    console.log("created");
  },
  beforeMount() {
    console.log("beforeMount");
  },
  mounted() {
    console.log("mounted");
  },
  setup() {
    console.log("setup");
    onMounted(() => {
      console.log("onMounted");
    });
  },
};
</script>

仅记录平常学习