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Development

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

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...

Bansidhar Kadiya - freecodecamp

How to Use the Fullscreen API in JavaScript (and Keep the Screen Awake with the Wake Lock API)

Sooner or later, most front-end developers hit the same request: "Can this take up the whole screen?" A slide deck, a video player, kiosk dashboard, game,...

Alex Oliinyk - freecodecamp

Other

How to Diagnose and Fix AI Inference Latency on Kubernetes

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...

Gursimar Singh - freecodecamp

Python Algorithmic Trading with SnapTrade, Massive, Alpaca

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...

Beau Carnes - freecodecamp

How to Build a Reliable AI Assistant with the Claude API

Large language models can answer questions, summarise documents, write code, and interact with external systems. But building a reliable AI application...

Chidozie Managwu - freecodecamp

How ORMs Still Let SQL Injection Through (and How to Close the Gaps)

A lot of developers assume that once they're on an ORM, SQL injection stops being their problem. But it doesn't disappear. It just relocates. ORMs like...

Hackita - freecodecamp

How to Build an AI Résumé Screening Tool with Next.js, Supabase, and TypeSafe Jev

When we post an engineering job, we get 300 to 400 résumés in a week. Reading each one carefully takes about two minutes. That adds up to eleven hours of work...

Sharvin Shah - freecodecamp

How to Govern AI-Generated Infrastructure with Policy as Code and OPA [Full Handbook]

Modern models generate syntactically correct code nearly 100% of the time. Veracode's 2026 report puts it plainly: "Syntax is effectively solved." That reads...

Kayode Adeniyi - freecodecamp

Why Software Automation Needs a Layer Between Intent and Execution

Software automation is good at turning instructions into actions. A pipeline can deploy a release, Terraform can provision infrastructure, a runbook can...

Hugo Teijiz - freecodecamp

How to Level Up Your Portfolio in the AI Era: From Technical Writer to Developer Educator

Until recently, building a technical writing portfolio could be as simple as creating a website, adding a list of articles, describing your writing...

Casmir Onyekani - freecodecamp

Under Autumn’s Spell (October 2026 Wallpapers Edition)

October is just around the corner, which means it’s time for some new desktop wallpapers! Designed by the community for the community, they’re here to brighten your screens, and...

Cosima Mielke - smashingmagazine