npm 安装与删除包的常用操作及 node中的模块声明,导出与导入

                <!DOCTYPE html>
                          <html lang="en">
                 <head>
                <meta charset="UTF-8">
                <meta http-equiv="X-UA-Compatible" content="IE=edge">
                <meta name="viewport" content="width=device-width, initial-     scale=1.0">
                <title>Document</title>
                <script src="https://unpkg.com/vue@next"></script>
                <style>
                    button{
                        background-color: red;
                        font-size: 32px;
                        color: rgb(245, 241, 241);
                    }
                </style>
            </head>
            <body>
                <button onclick="getData()">fecth</button>
                <button onclick="getDataOne()">await</button>
                <script>
                    //1. 实例演示fetch api, async,await的使用
                    function getData() {
                      fetch("http://xhr411.edu/users.php")
                        .then((response) => response.json())
                        .then((json) => console.log(json));
                    }
                    const url = "http://xhr411.edu/users.php";
                    async function getDataOne(){
                        const response = await fetch(url);
                        const result = await response.json();
                        console.log(result);
                    }
                  </script>
            </body>
            </html>

node中的模块声明,导出与导入

    // 1. 核心模块
    const http = require('http');
    console.log(http);
    // 2. 文件模块
    const demo = require('./demo.js');
    console.log(demo.getuser())
let user = "php.cn";
function getuser(){
    return this.user;
}
exports.user = user;
exports.getuser = getuser;

node中的模块声明,导出与导入

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