想要使用node.js必须先安装

server.js，示例代码（创建一个Web服务器）

  var http = require('http');
  http.createServer(function (request, response) {
  response.writeHead(200, {'Content-Type': 'text/plain'});
  response.end('AI\n');
  }).listen(8888);
  console.log('Server running at http://127.0.0.1:8888/');

启动命令

  node server.js
  Server running at http://127.0.0.1:8888/