Node.js Express Error Handling Guide

Express Error Handling

Node.js Express error handling uses middleware for 404 and 500 errors.

Introduction to Express Error Handling

Express is a popular web application framework for Node.js that provides a robust set of features to develop web and mobile applications. One essential feature is error handling, which ensures that your application can properly handle unexpected situations, like when a user requests a non-existent page or when your server encounters an internal issue.

Error handling in Express is managed through middleware functions, which can be used to catch 404 (Not Found) and 500 (Internal Server Error) responses, among others.

Handling 404 Errors

A 404 error occurs when a client requests a resource that does not exist on the server. In Express, you can handle 404 errors by defining a middleware function that captures any request that reaches this point without a response.