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utils.js

const p = 3function add(a, b) {
   	return a + b}class Person {
   	constructor(name, age, sex) {
   		this.name = name;		this.age = age;		this.sex = sex;	}	showInfo() {
   		console.log(`姓名:${
   this.name},年龄:${
   this.age},性别:${
   this.sex}`);	}}class Student extends Person {
   	constructor(name, age, sex, teacher) {
   		super(name, age, sex)		this.teacher = teacher	}	showInfo() {
   		console.log(`姓名:${
   this.name},年龄:${
   this.age},性别:${
   this.sex},我的老师是${
   this.teacher}`);	}}module.exports = {
   	add,	p,	Person,	Student,}

my.vue

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