Node.js

JSON Web Tokens (JWTs) have become a cornerstone in modern web development, especially for authentication and authorization. As a developer, you may often need to decode these tokens to access their payload data without verifying their signature. The jwt-decode npm package simplifies this process, making it straightforward to work with JWTs in JavaScript applications. In this article, we’ll walk through how to use the jwt-decode package to decode JWT tokens. We’ll cover the basics of JWT structure, the installation process, practical implementation examples, and important considerations for working with JWTs securely. ...

I’ve built OAuth authentication for 40+ Node.js apps. The Authorization Code Flow is the gold standard for web applications - secure, battle-tested, and works with every major identity provider. Here’s how to implement it right. Visual Overview: sequenceDiagram participant User participant App as Client App participant AuthServer as Authorization Server participant Resource as Resource Server User->>App: 1. Click Login App->>AuthServer: 2. Authorization Request AuthServer->>User: 3. Login Page User->>AuthServer: 4. Authenticate AuthServer->>App: 5. Authorization Code App->>AuthServer: 6. Exchange Code for Token AuthServer->>App: 7. Access Token + Refresh Token App->>Resource: 8. API Request with Token Resource->>App: 9. Protected Resource Why This Matters Most developers think OAuth is complicated. It’s not - if you understand the flow and avoid common mistakes. I’ve seen teams spend weeks debugging CSRF attacks, token storage issues, and session hijacking because they skipped critical security steps. ...