How to Build a Browser-Based PDF Blur Tool Using JavaScript
Many PDF documents contain information that shouldn't be shared publicly. Personal details, financial figures, signatures, addresses, account numbers,...
Bhavin Sheth - freecodecamp
Development
How to Build an AI Agent with Function Calling in Node.js Using Google Gemini
Last year, a client asked me to add a conversational interface to their internal reporting tool. Staff would type a question, and the system would pull a live...
Zia Ullah - freecodecamp
Build Bulletproof APIs using TypeScript in Express
If you've ever loved the speed of building backend servers with Express.js, but wished you didn't have to guess at types or debug silly runtime errors, we...
Beau Carnes - freecodecamp
How Clients and Servers Communicate: Full Handbook on HTTP/1.1, HTTP/2, REST, WebSockets, GraphQL, gRPC, and Protocol Buffers
You've built and consumed APIs. You know what a GET request is, what a JSON response looks like, and how to add an Authorization header. You've used REST,...
Oluwaseyi Fatunmole - freecodecamp
Weaponizing And Defending The React Flight Protocol: Deserialization Sinks In RSCs
While React Server Components rely on the custom Flight protocol to stream interactive UIs, this same mechanism introduces powerful deserialization sinks that attackers can...
Durgesh Pawar - smashingmagazine
Other
How to Diagnose Production Bugs When You Can't Reproduce Them Locally
Every developer eventually encounters the same frustrating problem. A customer reports that your application is failing in production. You try the exact same...
Manish Shivanandhan - freecodecamp
How to Use Prompt Engineering and Context Engineering for AI Agents
In this tutorial, I’ll show you how prompt engineering and context engineering can improve an AI agent's performance. We’ll build a simple local agent, start...
Darsh Shah - freecodecamp
What to Do if You've Outgrown Your Cron Job Scheduler
Most developers begin their automation journey similarly. They create a script that performs a helpful task, such as pulling data from an API, resizing a...
Rob Walters - freecodecamp
The New Agency Stack: How Dev Shops Use Claude, Cursor, and Copilot in Production
Two years ago, AI coding tools were a curiosity. Agencies let junior devs experiment with them on internal tools and side projects, the kind of work where...
Manish Shivanandhan - freecodecamp
Firestore Data Modeling Guide: Embedded Documents vs Referencing (with a Blog Case Study)
When developers transition from the relational world (MySQL, PostgreSQL) to Firestore, Firebase's NoSQL document database, they often bring their old habits...
Caleb Mintoumba - freecodecamp
Product Experiment Counterfactual Methods for Estimating the Effects of AI Prompt Engineering
Imagine your team deployed Prompt A globally two weeks ago. Tight deadlines and high confidence meant the rollout hit 100 percent of users without any A/B...
Rudrendu Paul - freecodecamp