Node.js模块与url

Posted 2020-07-01

Nodejs模块
创建模块 teacher.js
导出模块 exports.add = function () {}
加载模块 var teacher = require(‘./teacher.js‘);
使用模块 teacher.add(‘Scott‘);

入口文件：
index.js

1 var grade = require(‘./grade.js‘);
2 
3 grade.add(‘John‘, [‘小红‘,‘小明‘,‘熊大‘]);

 

模块文件：
student.js

1 function add(student) {
2     console.log(‘Add student: ‘ + student);
3 }
4 
5 //把方法暴露出去
6 exports.add = add;

teacher.js

1 function add(teacher) {
2     console.log(‘Add teacher: ‘ + teacher);
3 }
4 
5 //把方法暴露出去
6 exports.add = add;

grade.js

 1 var student = require(‘./student.js‘);
 2 var teacher = require(‘./teacher.js‘);
 3 
 4 //student.add(‘xiaoming‘);
 5 teacher.add(‘John‘);
 6 
 7 function add(teacherName, students) {
 8     teacher.add(teacherName);
 9 
10     students.forEach(function (item, index, arr){
11         student.add(item);
12     });
13 }
14 
15 //这两句代码调用有一些区别，但实现起来是一样的
16 exports.add = add;
17 //module.exports = add;

 

URL

//命令行中体验

url.parse(‘https://www.baidu.com/‘);

//第二个参数设置为true，表示query对象的值以对象的方式呈现
url.parse(‘https://www.baidu.com:8080/list?from=scott&course=node#floor1‘,true);

url.format({
protocol: ‘https:‘,
slashes: true,
auth: null,
host: ‘www.baidu.com:8080‘,
port: ‘8080‘,
hostname: ‘www.baidu.com‘,
hash: ‘#floor1‘,
search: ‘?from=scott&course=node‘,
query: ‘from=scott&course=node‘,
pathname: ‘/list‘,
path: ‘/list?from=scott&course=node‘,
href: ‘https://www.baidu.com:8080/list?from=scott&course=node#floor1‘
})

url.resolve(‘https://www.baidu.com/‘, ‘search/list‘)
//结果： ‘https://www.baidu.com/search/list‘