1：首先在vscode编辑器中打开，【文件】–>【首选项】–>【用户片段】–>【新代码片段】–> 取名vue.json 确定
2：复制下列代码，只要在.vue文件下输入vue3回车即可生成模板

{
	"Print to console": {
		"prefix": "vue3",
		"body": [
			"<template>",
			"  <div></div>",
			"</template>",
			"",
			"<script lang='ts'>",
			"import {defineComponent, reactive, toRefs, onBeforeMount, onMounted } from 'vue'",
			"export default defineComponent({",
			"  name: '',",
			"  setup() {",

			"    const data = reactive({})",
			"    onBeforeMount(() => {",
			"     //2.组件挂载页面之前执行----onBeforeMount",
			"    })",
			"    onMounted(() => {",
			"      //3.组件挂载到页面之后执行-------onMounted",
			"    })",
			"    return {",
			"      ...toRefs(data),",
			"    }",
			"  },",
			"})",
			"",
			"</script>",
			"<style scoped lang='less'>",
			"</style>",
		],
		"description": "Log output to console"
	}
}