Using streams in Node.js is a powerful mechanism to process data. Especially when working with large data sets where you might want to filter chunks that don’t match a given criteria. {{outline}} Example: Loading Lines From File to Database Imagine the following example: you want to load a …

JSON Web Token (JWT) authentication comes with a trade-off: the created token lives on client side. You don’t need to store a token in your server-side database to make JWT authentication work in your application. This is —simultaneously— the largest benefit of JWT: your server can trust a verified …

Node.js benefits from new language features in JavaScript. The introduction of classes in JavaScript is a great step towards better extensibility. You provide functionality in a base class, let other classes extend this base class, and use the given methods. But how to extend multiple classes in Node.js? …

JSON web tokens (JWT) are a convenient way to authenticate users on your platform. The simplest version of handling JWT authentication looks like this: creating a token by signing it with a secret key that is only known to your application. Once created, you send off the compact form of …

Handling errors plays a major role in your application. In error situations, you want to know the details of the issue and how to solve it. When developing your app, you can create your own errors. Errors in Node.js are extensible classes. This tutorial walks you through the creation …

When using JSON web tokens in your application, you’ll find JWT related implementations in different places. For example, creating a new JWT is part of a login route handler. Authenticating an incoming JWT takes place in an authentication strategy. Refreshing a JWT, JWT logout, or token blacklisting are use …

The development lifecycle of NPM packages is fast. You’ll regularly notice releases that contain new features or bug fixes. Over time, your project’s dependencies go out of date and you need to invest time into updating the third-party packages. Show Outdated NPM Packages The NPM CLI shows outdated …