node.js – Difference between app.use and app.get in express.js

app.use() is intended for binding middleware to your application. The path is a “mount” or “prefix” path and limits the middleware to only apply to any paths requested that begin with it. It can even be used to embed another application:

// subapp.js
var express = require('express');
var app = modules.exports = express();
// ...
// server.js
var express = require('express');
var app = express();
app.use('/subapp', require('./subapp'));
// ...

By specifying / as a “mount” path, app.use() will respond to any path that starts with /, which are all of them and regardless of HTTP verb used:
PUT /foo
POST /foo/bar
app.get(), on the other hand, is part of Express’ application routing and is intended for matching and handling a specific route when requested with the GET HTTP verb:
And, the equivalent routing for your example of app.use() would actually be:

app.all(/^/.*/, function (req, res) {


您的电子邮箱地址不会被公开。 必填项已用*标注