freeCodeCamp

How to Debug a Stuck Kubernetes Rollout with a Hands-On Lab

praneethhere |
You update a Deployment, run kubectl rollout status, and wait. The command times out. But when you send a request to the Service, it still answers. So did the update finish? And if it didn't, which Po... read more

How to Build a Code Graph in TypeScript Using VS Code's Language APIs

Otobong Peter |
Modern codebases are becoming increasingly difficult to navigate. This isn't necessarily because developers are writing more code themselves. It's mostly because coding assistants are generating hundr... read more

The Node.js and Express.js Handbook for Beginners – Servers, Routes, Routers, and Views Explained

Oluwatobi Sofela |
Node.js is a runtime environment for executing JavaScript outside the web browser. From small scripts to large-scale back-end applications, Node.js provides the APIs and tools you need to build JavaSc... read more

Healthcare AI Won't Work Until You Fix Your Data

Manish Shivanandhan |
Building AI for clinical settings is harder than it looks. It takes more than picking a good model or tuning the right parameters. When engineers enter a hospital ecosystem, they quickly discover that... read more

Does No Screen Mean Better Data? The 101 on Screenless Wearables

Reetain Raina |
Smartwatches have made health data easier to access. A quick glance at your wrist can reveal your heart rate, step count, sleep duration and even estimated recovery. But displaying all this informatio... read more

How CSS content-visibility Works and How It Can Improve Rendering Performance

Ayman Eldawy |
What happens when a page has 150 content-heavy cards, but the user can only see the first few? You might expect the browser to only worry about what's currently visible. But this isn't exactly what ha... read more

How to Build a Real-Time Word Counter Tool with HTML, CSS, and JavaScript

Bansidhar Kadiya |
Whether you're writing an essay, a tweet, or a blog post, keeping track of your word and character count is very important. In this tutorial, you'll build a fully functional, real-time Word Counter to... read more

How to Diagnose and Fix AI Inference Latency on Kubernetes

Gursimar Singh |
It's Thursday, around quarter past two. Your team shipped an internal assistant two weeks ago. The demo went well enough that someone in finance asked whether it could read contracts. Word spread. Tod... read more

Python Algorithmic Trading with SnapTrade, Massive, Alpaca

Beau Carnes |
We just published a comprehensive, hands-on video course on the freeCodeCamp.org YouTube channel that will teach you how to build an automated, end-to-end algorithmic trading system from scratch using... read more

How to Build a Reliable AI Assistant with the Claude API

Chidozie Managwu |
Large language models can answer questions, summarise documents, write code, and interact with external systems. But building a reliable AI application requires more than sending a prompt and displayi... read more