node.js - app.get() 或 router.get() 之间的区别 - ExpressJs

Question

有什么区别:

var express = new express();
var app = new express();

app.get("/", function() {

.....
})

和:

var express = new express();
var router= express.Router();

    router.get("/", function() {

    .....
    })

Answer 1

app.get 可用于在顶层为您的应用程序创建路由。

来自关于 express.Router 的文档

Use the express.Router class to create modular, mountable route handlers. A Router instance is a complete middleware and routing system; for this reason, it is often referred to as a “mini-app”.

路由器需要安装到应用程序:

const router = express.Router();

router.get("/", (res, req) => res.end());
router.post("/", (res, req) => res.end());

app.use("/empty", router);

这使您可以更轻松地将多个路由的功能封装到一个应用程序中，该应用程序将在特定路由下命名空间。