``` npm -y init ``` ### 會自動生成package.json ``` { "name": "socket_demo1", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1" }, "author": "", "license": "ISC" } ``` ### 修改package.json ``` { "name": "socket_demo1", "version": "1.0.0", "description": "", "main": "server.js", "scripts": { "start": "node server.js" }, "author": "", "license": "ISC" } ``` ### 運行 ``` npm start ```