freeCodeCamp

High-Frequency Real-Time Data in React: From Ring Buffers to OffscreenCanvas

Vineeth Pawar |
React is great at many things. But if you've ever tried pushing thousands of data points per second through it, you'll quickly learn that React isn't a firehose. It's more like a garden hose. Try forc... read more

What to Do if Your Site Is About to Hit Vercel's Free Image Optimization Cap

Md. Fahim Bin Amin |
I maintain my own website, and every now and then I upgrade the site to a new version. And I frequently experiment with different technologies and architectures while doing so. Recently, I faced an is... read more

How to Build More Accessible Websites with WCAG 2.2

Aiyedogbon Abraham |
A website can look polished, work perfectly with a mouse, and still be difficult for some people to use. A form might use colour as the only indication that something went wrong. A sticky header might... read more

How to Work with Material and Cupertino Decoupling in Flutter [Full Handbook]

Atuoha Anthony |
Earlier this year, I published Decoupling Material and Cupertino in Flutter, which covered what was then a preview feature: Flutter's plan to separate the Material and Cupertino design libraries from... read more

How to Work with Subqueries in SQL

Abdullah Rufai |
Whenever you see a query nested inside another query in SQL, that's a subquery. A subquery is also known as an inner query while the one that contains it is called the main or outer query. Subqueries... read more

How to Scale LLM Inference for AI Agents Using vLLM

Darsh Shah |
In this tutorial, I’ll show you how to scale LLM inference for AI agents using vLLM. I'll help you build an intuition for how LLM inference works, explore why agent workloads create GPU scheduling and... read more

How to Manage Context Files in Your Codebase and Get Better Output From AI Coding Agents

Kayode Adeniyi |
You ask a coding agent for a new endpoint, and ninety seconds later you have a working endpoint. Then you read the diff, and you find that it pulled in a validation library that's not in your package.... read more

How to Build a Basic Discord Storytelling, Chat, and Mental Wellness Bot with Python

Eva J Patel |
Discord bots can look surprisingly complicated when you see them in action. A bot can respond to messages, tell stories, remember parts of conversations, and stay online around the clock. When I first... read more

How to Build a Multi-Agent Trading Research System with LangChain Deep Agents [Full Handbook]

Nikhil Adithyan |
A trading research agent can write strategy code, run a backtest, inspect the results, and keep revising the strategy. The harder problem is making sure that this loop doesn't turn into an uncontrolle... read more

Why Your Wearable Needs Weeks of Data Before It Becomes Useful

Shradha Puri |
I can recall the time when I first put on the Oura Ring and checked my readiness score the next morning as if I were checking an exam score. I saw something like 62 and I really started to panic. Was... read more