Node.js和ES6的导入

nodejs中导入导出

导出：导出多个

const a = () => {}
const b = 'xx'

module.exports = {
  a,
  b
};

导入：整体导入

const m = require('./a');
m.a();
console.log(m.b)

导入：解包导入

const {a, b} = require('./a');
a();
console.log(b);

当然可以只导出一个

const a = () => {}
module.exports = a;

const a = require("./a")

别名

const {a: A, b: B} = require('./a');

ES6中导入导出

// 多个导出
export const a = () => {};
export const b = 100;

// 另一种多个导出
const a = () => {};
const b = 100;
export {a, b};

// 默认导出，和多个导出不能共存
const c = () => {};
export default c;

// 导入
import m from "./a"
m.a();
console.log(m.b);

// 解包导入
import {a, b} from "./a"
a();
console.log(b);

// 别名
import {a as A, b as B} from "./a"
A();
console.log(B);