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What I Learned Building a Figma ↔ React Design System with a Registry and Local Guard

I’ve been building Skrewww, a design system that lives across Figma and React.At first, the goal sounded straightforward:Keep the Figma library and the React implementation in sync.In practice, that quickly turned into a much bigger systems problem.The difficult part wasn’t building more components.It was deciding:What is actually canonical?What should be generated?What can be checked mechanically?What still requires human design judgment?How do you know a component that looks correct in the rep

Firebase Remote Config for Web Apps: Your App’s Remote Control

If you've worked with LaunchDarkly, the idea of Firebase Remote Config will probably feel familiar.You've probably done this before:if (featureFlags.newCheckout) { // Show the new experience} else { // Keep the old experience}The beauty of feature flags is that you can deploy the code without necessarily exposing the feature to everyone.You can turn something on.Turn it off.Roll it out gradually.Experiment with it.And, most importantly, you don't need to create a new deployment every time you

🔥 30 Days of Frontend - Day 1

What Actually Happens When State Changes in React?When state changes, many developers think:setState() → React updates the DOMThat's a useful simplified model, but there's more happening in between.A better mental model is:State / Props change ↓React schedules a render ↓Component runs again ↓React reconciles the new tree ↓React commits the required DOM changes 1. State or props changeFor example:const [count, setCount] = useState(0);setCount(count + 1);The

Top 10 Places to Buy Google Voice Accounts Verified & Safe

Top 10 Places to Buy Google Voice Accounts Verified & Safe24 hours response/(Contact US)➤ WhatsApp: +1 (903) 702-9701➤ Telegram: @usasvcit➤ Email: [email protected] The phrase “Buy Google Voice Accounts” is commonly used by people searching for information about Google Voice numbers, account features, communication tools, and ways to establish a dedicated phone number for personal or professional purposes. However, the most useful way to understand the subject is to focus on how Google Voic

Fetch API in JavaScript

The Fetch API is a built-in feature in JavaScript that is used to communicate with a server or an API. It helps us send requests to a server and receive data from it. Fetch API is commonly used in web applications to get products, users, posts, weather information, and other data.The basic syntax of Fetch API is:fetch("URL")For example:fetch("https://jsonplaceholder.typicode.com/posts")Here, fetch() sends a request to the given URL.When the server receives the request, it sends a response. We ca

Add a Web Application Firewall to Your Node.js API in Five Minutes

Most Node.js APIs go to production with no request filtering at all. Inputvalidation catches malformed data, but it is not built to spot a SQLinjection hidden in a search box, a path traversal trying to read systemfiles, or an automated scanner probing every route. That is the job of a WebApplication Firewall (WAF).When I went looking for one for my own Node.js projects, I was surprised byhow little there was. Good security tooling is hard to find in this corner ofthe ecosystem: most of the WAF

Connected Is Not Writable

The first fifteen minutes of an AI coding setup almost never die on model quality, which still surprises people. They die on a quieter question: can this process write a file where you believe the repo lives? If that answer is no, every later prompt becomes theater, because the agent acts on a disk you cannot see. I now refuse to send a first prompt until a canary file exists, because the operating system cannot fake that particular kind of proof.Think of it like hiring movers after they sent a

React Basics: Library, SPA, Rendering, Components, JSX and Props.

React as a JavaScript LibraryReact is a JavaScript library mainly used for building user interfaces. A library provides reusable code that we can use whenever we need it. The main difference between a library and a framework is control. In a library, we call the library when we need it, but in a framework, the framework provides the overall structure and controls the flow of the application.For example, Axios is a library used for making HTTP requests. We decide when to call it:axios.get("

Mirobot Simulator — A 6-DOF Robot Arm Simulator Built with Vue, Electron, and Three.js

Credits: This simulator is based on the WLKATA Mirobot 6-DOF robotic arm platform.Original robot platform and design by WLKATA Robotics.Simulator developed and produced by Innovative Experiment Co., Ltd. (INEX), Thailand.Robotics becomes much easier to understand when you can see the robot move before sending commands to real hardware.That idea led to the development of Mirobot Simulator, an interactive 6-DOF serial manipulator simulator based on the WLKATA Mirobot robotic arm platform.The simul

If You Can't Show the Receipt, It's a Zero: A Bootcamp Lab on Agent Spend Caps

An agent that finishes the kata and cannot show a receipt did not finish the kata. It hid a bill. In this bootcamp that is a zero. Not a vibe. A gate.Why? Because "it works on my key" is not a skill. It is a subsidy. Someone is paying, and it is usually a personal credit card, a leftover cloud coupon, or a teammate's token pasted into chat. I do not grade subsidies. I grade the ledger. The failure I keep seeingA pair ships a tool-calling loop. Looks sharp. Then I ask three questions.Which s

The Black Rectangle That Doesn't Redact

Documents keep going public with their secrets still inside. The pattern is always the same: someone draws black boxes over the sensitive lines, exports the file, and a reader selects the text under the boxes and pastes it into an email.The mistake keeps happening because the result looks correct. A black rectangle is black. Nothing on the screen suggests that the words underneath are still there. Here is why they are, how to check your own files in a minute, and what deleting text from a PDF ac

What Should Programmers Do While the AI Writes Code?

There's a moment that didn't exist three years ago. You type out a task, hit enter, and then you just sit there. The agent is reading files, thinking, editing things. A little spinner goes around. Maybe it's forty seconds, maybe it's six minutes.The first few times, I didn't know what to do with my hands.What I did, for a while, was open Twitter. Then a Slack channel. Then a tab about a mechanical keyboard I had no intention of buying. By the time the AI finished, I'd lost the whole thread of wh

Review Agent PRs That Cache With Unbounded Maps

A flash sale hit the catalog service at noon. Latency for product reads climbed past two seconds. An agent opened a pull request before the war room ended.The title claimed a simple in-memory product cache. The diff touched one new module and two call sites. The reviewer almost approved it on size alone. The change under reviewThe agent added a module-scoped Map named productCache. Each miss loaded a row and stored the whole record. No TTL, max size, or invalidation path existed.Missing pro

🔗 I Built a Free QR Code Generator with React and TypeScript

🚀 Why I built another QR code generatorQR codes are one of those small pieces of technology that we see almost everywhere.You scan one to open a website, connect to Wi-Fi, send contact information, join a service, or share something with someone.I wanted to build a QR Code Generator that keeps that process simple.So I added one to my web project, GhostStyle. 👻 What is GhostStyle?GhostStyle started as a collection of tools for people who want to customize their online identity.It inclu

Jev in practice: typed decisions, scoped authority

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Why hardcoded in-app announcements are technical debt in disguise

Every SaaS team starts the same way: a simple boolean column in PostgreSQL (has_seen_v2_modal), a useEffect hook, and a conditional modal component.Fast forward 6 months, and your frontend bundle is 80KB heavier with 14 dead announcement modals, 3 hydration race conditions, and marketing asking why the banner didn't trigger for trial users.Here is why hardcoding in-app experiences is an anti-pattern—and how to architect a deterministic, decoupled announcement engine in Next.js. The 3 Inevit

Stripe built its internal AI platform

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React

IntroductionReact is a JavaScript library used to build user interfaces (UI), especially for web applications.React was developed by Facebook (now Meta) and was first released as an open-source project in 2013. Why Do We Use React?In traditional websites, when we change something on a page, the browser may reload the whole page. React helps us build applications where the UI can be updated efficiently without reloading the entire page.React is commonly used to create Single Page Appli

What is ShaadKit? A Look at My Personal Foundation for Next.js Projects

Where Does the Problem Start?Imagine you've started a new Next.js project. You're about to build something new and exciting. But before you even write a single line of code for the actual product, you have to get through a mountain of repetitive tasks:Setting up ESLint with the right config and strict rulesSetting up Stylelint for CSS and CSS ModulesSetting up Storybook for component-driven developmentAdding testing with Vitest and PlaywrightSetting up i18n for multilingual support from th

React State vs Server State: Why You Shouldn't Store Everything in useState

I used to think fetching API data in React was pretty straightforward.Fetch the data → put it in useState → render it.And for a small application, it works perfectly fine.const [users, setUsers] = useState([]);useEffect(() =&gt; { fetch("/api/users") .then(res =&gt; res.json()) .then(data =&gt; setUsers(data));}, []);The problem starts when the application grows.Suddenly, you need to handle:Loading statesErrorsRefetchingCachingStale dataRetriesMultiple components using the same