I built a real-time social network to challenge X/Twitter. Try to crash it.
Let’s be honest: building another social media app is usually a cliché. But I wanted to see how far I could push modern web architecture, real-time da…
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Warm Table — A Taiwanese Comfort Soup Landing Page
What I Built I built Warm Table , a fictional Taiwanese comfort-soup house inspired by the idea that a warm bowl of soup can make a difficult day feel…
30 technical interview questions, explained the way you'd actually say them
30 Technical Interview Questions You Should Be Able to Explain Out Loud (JS / React / Node) Most interview prep content gives you a definition. Real i…
Referential Transparency in TypeScript: Software Humans and AI Can Reason About
The most valuable property of functional programming is not immutability, monads, or writing everything as an arrow function. It is referential transp…
I built 80+ free browser tools — no signup, no ads, no paywalls (here's what I learned)
A few months ago I got frustrated. I needed to compress a PDF quickly. Found a tool online — it asked me to create an account first. Found another — i…
Claude Code in CI: Running Agentic Code Review, Test Generation, and Auto-Fix on Every Pull Request
Claude Code in CI: Running Agentic Code Review, Test Generation, and Auto-Fix on Every Pull Request This article was written with the assistance of AI…
Pixel Chef AI: A Memory Kitchen That Learns Your Taste
This is a submission for Frontend Challenge - Comfort Food Edition, Perfect Landing 🍳 Pixel Chef AI — A Memory Kitchen That Learns Your Taste What I B…
I built 38 free browser-only tools that never upload your files
Every time I needed to "compress an image online" or "merge a PDF", I ended up on some site that makes you upload your file to their server. For a ran…
Where to Publish a Web Game in 2026
A finished browser game is a bundle of static files. Whether you built it in Phaser, Three.js, Babylon.js, Godot, or plain canvas code, the output upl…
Temporize, Promise-aware debounce and throttle for TypeScript
I built Temporize because traditional debounce/throttle utilities don’t compose particularly well with async TypeScript. Every scheduled call returns …
Why Your Web Scrapers Keep Breaking (And How to Build Self-Healing TypeScript Agents Using LLMs and Playwright)
If you have ever maintained a production web scraping pipeline or an automated form-filling assistant, you know the sinking feeling of checking your l…
Forget The Build Step: A Browser-Native Editor For JSX + CSS
Frontend tooling is incredibly capable. It is also often front-loaded. For many UI ideas, the first thing you do is not write code. You install, confi…
🚀 Mock APIs Just Got an Upgrade: Network Delay Simulation, Error Testing & Postman Exports in Playground API v2
A few days ago, I introduced Playground API —a zero-config, stateful mock REST API designed to solve a huge frontend headache: mock APIs like standard…
Four AI APIs, four completely different citation formats. Getting the data out was harder than the analysis.
I've been running a small monthly study : take ten buyer-intent questions from one industry, ask four AI assistants the identical question, and record…
You've been wrapping `new URL()` in try/catch. `URL.parse()` does it natively.
Every codebase has this utility function somewhere. You wrote it the first time an untrusted URL caused an uncaught exception, or when a form field ne…
Your MCP Tool Definition Can Be 100% Spec-Compliant and Still Not Work
Your MCP Tool Definition Can Be 100% Spec-Compliant and Still Not Work I've been building a few free browser-based tools for people working with LLM A…
Building a Browser-Based Line Break Remover with Local-First Text Processing
Removing line breaks looks like a one-regex job. text.replace(/\n/g, '') and you're done. Then real text shows up, and it turns out line endings are a…
Nine Red Tests and No Way to Tell Which Ones Matter
Every SDET I know has a private ritual for the morning after a red nightly, and every one of them is embarrassed by it. Mine went like this. Open the …
I built 79 browser tools that never upload your data — here's why client-side matters
Every developer has hit this: you need to resize an image, decode a JWT, or format a messy JSON blob. So you search "online [thing]", land on some too…
1,756 hand drawn icons, and nobody drew them
For a while my routine on side projects was this: find one sketchy icon somewhere, download the SVG, rename it, drop it in assets , then fix its strok…
Array methods are eager. Iterator helpers are lazy. Here's why that matters.
Every time you chain .filter() and .map() on an array, JavaScript creates two new arrays. For small lists this is invisible. For a large dataset, a ge…
It Was Just a Patch Update. What Could Possibly Go Wrong?
This is a submission for DEV's Summer Bug Smash: Smash Stories powered by Sentry . You know those version numbers in libraries and frameworks, right? …
I built TryQuickImg: compress HEIC/JPG/PNG in the browser — no upload
Most free image converters ask you to upload first. Fine for a meme — less fine for a passport or exam photo. TryQuickImg https://tryquickimg.com/ Com…
React useUpdateEffect Hook: Skip the First Render (2026)
React useUpdateEffect Hook: Skip the First Render (2026) useEffect has no opinion about why it's running. Mount, update, doesn't matter — the callback…
Turns out my "random group splitter" doesn't roll any dice — here's what it does instead
A while back I wanted to build the classic "paste a list of names, get N even groups" tool — the kind of thing every teacher and event organizer has n…
How I built an Ad-Free Anime Dashboard using the AniList API
Hello everyone! 👋 As a web development student, I wanted to build a portfolio project that solves a real problem I face: annoying pop-up ads on stream…
Building a Real-Time Word Counter in JavaScript
Why Build One? Whether you are building a modern CMS, an in-browser markdown editor, or a custom blogging platform, real-time text analysis is a funda…
You reach for Sass to mix colors. `color-mix()` does it natively.
Every design system has this pattern: one brand color, eight shade variants, a slightly darkened hover state, and a lightened disabled state. For year…
A Disabled Button Is Not Delivery: Build a Receipt-Based React Support Form
A user writes a detailed bug report, presses Send , and sees a disabled button. Then the request takes longer than expected. Did the report arrive? Sh…
How to Build a Profitable Chrome Extension in 2025
How to Build a Profitable Chrome Extension in 2025 tags: javascript, chrome, extension, money tags: javascript, chrome, extension, money How to Build …