一、对象导出

1-1、导出

data.js

var a = 10;
var b = 20;
export default {
    a,
    b
}

1-2、导入

import data from './data'
...
 mounted(){
   console.log(data)
 }

二、变量导出

2-1、导出

export

var a = 10;
var b = 20;
export  {
    a,
    b
}

2-2、导入

import {a,b} from './data'
...
 mounted(){
   console.log(a)
   console.log(b)
 }