导出示例

const baseURL='http://geek.itheima.net'
const getSum =（numA,numB）=>numA+numB
const getArraySum =arr =>{
    let sum = 0
    arr.forEach(item => sum += item)
    return sum
}
export default {
    getArraySum,
    getSum,
    url:baseURL,
}

导入示例

Node

警告

Node默认采用commonjs解析，请在package.json并配置"type":"module"

//语法：import 变量名 form '模块标识'
import obj from'./01_export.js'
console.log(obj);
console.log(obj.getArraySum（[1,2,3]));

浏览器

<script type="module">
  import obj from 'test.js'
  console.log(obj)
</script>