(1) 新建 lib/math export function sum(num1, num2) { return num1 + num2; } export function mul(num1, num2) { return num1 * num2; }

(2) 新建 lib/format.js export function dateFormat() { return "2022-03-09" }

(3) 新建 index.js import * as math from './lib/math' import * as format from './lib/format'

export {
  math,
  format
} 

(4) 在当前项目下生成一个 package.json 文件 --- npm init

(4) 登录 npm 账号(用户名：searotating;邮箱：[email protected];密码：searotating1314)