Express.js Middleware Tutorial
Developers who are new to Express often get confused with the difference between route handler and middleware. Therefore they also get confused with the difference between app.use() , app.all() , app.get() , app.post() , app.delete() and app.put() methods. In this tutorial I will explain the exact difference between a middleware and route handler. And also how to use the app.use() , app.all() , app.get() , app.post() , app.delete() and app.put() methods correctly. Route Handler app.all() , app.get() , app.post() , app.delete() and app.put() methods are all used to define routes. A route is used to handle a HTTP request. A route is a combination of a path and callback, which is executed when a request’s path is matches. The callback is called as the route handler. The difference between app.all() , app.get() , app.post() , app.delete() and app.put() methods is that they handle different types of HTTP requests. For example: app.get() handlers only