vscode怎么引用js

var http = require('http');

http.createServer(function (request, response) {

    // 发送 HTTP 头部

    // HTTP 状态值: 200 : OK

    // 内容类型: text/plain

    response.writeHead(200, {'Content-Type': 'text/plain'});

    // 发送响应数据 "Hello World"

    response.end('Hello World\n');

}).listen(8888);

// 终端打印如下信息

console.log('Server running at http://127.0.0.1:8888/');