3.x API 参考

3.x API

本部分概述了在 Express 3.x 中用于构建网页应用和 HTTP 服务的模块和 API。

🌐 This section provides an overview of the modules and APIs available in Express 3.x for building web applications and HTTP services.

express()

express 模块导出的 express() 函数会创建并返回一个新的应用实例，该实例用作定义路由、配置中间件和处理 HTTP 请求的基础。

🌐 The express() function, exported by the express module, creates and returns a new application instance that serves as the foundation for defining routes, configuring middleware, and handling HTTP requests.

var express = require('express');
var app = express();

app.get('/', function (req, res) {
  res.send('hello world');
});

app.listen(3000);

在创建应用实例后，你可以定义路由、配置中间件，并开始处理 HTTP 请求

🌐 After creating an application instance, you can define routes, configure middleware, and start handling HTTP requests