webpack 支持 ESModel 规范和 CommonJS 规范

一、ESModel 规范

• ESModel 模块导入方式：import
• ESModel 模块导出方式：export、export default

1. export 导出 和 import {}、import * as 导入

export const name = 'alias'
export const age = () => {
  return 18
}

<template>
  <div id="app">
  </div>
</template>

<script>
import { name, age } from './utils/user'
import * as user from './utils/user'
export default {
  name: 'App',
  created() {
    console.log(name) // alias
    console.log(age()) // 18
    console.log(user.name) // alias
    console.log(user.age()) // 18
  },
}
</script>

2. export default 导出 和 import 导入

const name = 'alias'
const age = () => {
  return 18
}

export default { name, age }

<template>
  <div id="app">
  </div>
</template>

<script>
import user from './utils/user'
export default {
  name: 'App',
  created() {
    console.log(user.name) // alias
    console.log(user.age()) // 18
  },
}
</script>

二、CommonJS 规范

• CommonJS 模块导入方式：require
• CommonJS 模块导出方式：exports、module.exports

1. exports. 导出 和 require 导入

const name = 'alias'
const age = () => {
  return 18
}
exports.name = name
exports.age = age

<template>
  <div id="app">
  </div>
</template>

<script>
const user = require('./utils/user')

export default {
  name: 'App',
  created() {
    console.log(user.name) // alias
    console.log(user.age()) // 18
  },
}
</script>

2. module.exports = {} 导出 和 require 导入

const name = 'alias'
const age = () => {
  return 18
}

module.exports = {
  name,
  age,
}

<template>
  <div id="app">
  </div>
</template>

<script>
const user = require('./utils/user')

export default {
  name: 'App',
  created() {
    console.log(user.name) // alias
    console.log(user.age()) // 18
  },
}
</script>