![]() The Request object represents the HTTP request performed by the client to an Express server. Adding custom properties to the Request type.Understanding declaration merging in TypeScript.Extending the Express Request type in TypeScript.Extending the Express Request interface locally.TL DR: Let’s learn how to extend the Request type in TypeScript to make its instances store custom data you can use at the controller level. Then, let’s see how you can take advantage of the extended Request object through an Express demo application built in TypeScript. Let’s now learn what Request is in Express, and delve into the reasons why extending the Request type in TypeScript can be useful. ![]() In TypeScript, you need to extend the Request type if you want to define custom properties. In JavaScript, you can simply define new properties in the Request object and use them when needed. You might need to elaborate on the data you received in the HTTP request and provide the controllers with custom info. ![]() Therefore, all data from the request available at the application layer depends on this object. The Request object is used by Express to provide data about the HTTP request to the controllers of a Node.js server. How to extend the Express Request object in TypeScript Spreading knowledge through writing is my mission. Antonello Zanini Follow I'm a software engineer, but I prefer to call myself a technology bishop.
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