288 Node.js模块化开发：js开发弊端，模块的概念，模块成员导出的2种方式及其区别，模块成员导入

// console.log(112);

const add = (n1, n2) => n1 + n2;
exports.add = add;

---

// const a = require('./03.module-a.js');
const a = require('./03.module-a');
console.log(a.add(10, 20));  // 30
console.log(111); // 111

---

const greeting = name => `hello ${name}`;
const x = 100;
exports.x = x;
module.exports.greeting = greeting;

// 当exports对象和moudle.exports对象指向的不是同一个对象时 以module.exports为准
module.exports = {
    name: 'zhangsan'
}

exports = {
    age: 20
}

---

const a = require('./04.module.exports.js');
// console.log(a.greeting('zhangsan'));
console.log(a);  // { name: 'zhangsan' }