Middleware in an Express.js application is like a helper in a conversation. It sits between the request (what users ask for) and the response (what the server sends back). Here’s how it works:
Processing Requests: Middleware can look at and change incoming requests. It can add new information to the request or even stop the whole request if necessary.
Reusing Code: With middleware, you can create code that can be used again for common tasks like logging (keeping track of activities), checking if a user is allowed to do something (authentication), and handling errors. This helps keep your routes clean and focused on their main job.
Managing Routes: Middleware can help control how requests flow through your app. You can use specific middleware for certain routes, decide how to process requests based on different conditions, and manage how different parts of your app talk to each other.
In simple terms, middleware makes handling requests smoother, allows you to reuse code, and improves the overall setup of your Express.js application.
Middleware in an Express.js application is like a helper in a conversation. It sits between the request (what users ask for) and the response (what the server sends back). Here’s how it works:
Processing Requests: Middleware can look at and change incoming requests. It can add new information to the request or even stop the whole request if necessary.
Reusing Code: With middleware, you can create code that can be used again for common tasks like logging (keeping track of activities), checking if a user is allowed to do something (authentication), and handling errors. This helps keep your routes clean and focused on their main job.
Managing Routes: Middleware can help control how requests flow through your app. You can use specific middleware for certain routes, decide how to process requests based on different conditions, and manage how different parts of your app talk to each other.
In simple terms, middleware makes handling requests smoother, allows you to reuse code, and improves the overall setup of your Express.js application.