In Express.js, what is the purpose of middleware?
Understand the Problem
The question is asking about the purpose of middleware in Express.js, specifically what actions it performs during the request-response cycle.
Answer
Middleware executes code, modifies requests/responses, and controls request-response cycles in Express.js.
Middleware in Express.js is used to execute code, modify request and response objects, and control the request-response cycle by ending it or passing control to the next middleware.
Answer for screen readers
Middleware in Express.js is used to execute code, modify request and response objects, and control the request-response cycle by ending it or passing control to the next middleware.
More Information
Middleware functions are an essential part of Express.js, providing a way to process requests and responses and keep the application logic organized.
Tips
A common mistake is forgetting to call the 'next()' function in middleware, which can cause the request to hang.
Sources
- Using Middleware - Express.js - expressjs.com
- Middleware in Express - GeeksforGeeks - geeksforgeeks.org
- Writing middleware for use in Express apps - expressjs.com
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