In an API-driven world, error handling is integral to every application. You should have an error handling layer in your Node.js app to deal with errors securely and effectively.
An error handling layer is a collection of files in a backend software architecture that contain all the logic required to handle errors. Specifically, an error handling layer in a Node.js app can be implemented with an Express middleware that takes charge of intercepting and handling errors consistently.
In other words, all errors that occur in an Express application pass through that layer. By centralizing error handling logic in one place, you can easily integrate custom error behaviors like logging or monitoring. Also, you can standardize the error response returned by the Express server when an error occurs.
All this information helps the caller understand what happened and how to handle the error. These are just a few reasons why you should adopt an error handling layer in your Node.js Express application. Let's find out more about this.