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Why We Built a 100% In-Browser Financial & Creator Calculator Matrix with 7 Languages
Why We Built a 100% In-Browser Financial & Creator Calculator Matrix with 7 LanguagesMost online calculator websites on the internet today suffer from three major issues:Invasive Ad Clutter: 4 to 8 banner ads per page that slow down your browser.Privacy Concerns: Sending sensitive revenue, MRR, or invoice quotes to remote servers.Outdated Formulas: Many still quote 2019 payment gateway fees and miss recent platform policies (like TikTok Creator Rewards Program or Stripe's international
How to Manage Long UTM URLs in Developer Workflows
Long URLs are not always a problem.Sometimes they are exactly what you want.A campaign URL like this contains useful information:https://example.com/pricing?utm_source=newsletter&utm_medium=email&utm_campaign=august_launch&utm_content=cta_buttonThe problem starts when the same URL has to move through several parts of a workflow:an email systema notification servicea CMSa QR codean internal dashboarda social posta databasean analytics pipelineAt that point, manually creating, copying,
I Built a Free Privacy Policy & Terms Generator (Because TermsFeed Charges $30/Month)
I Built a Free Privacy Policy & Terms Generator (Because TermsFeed Charges $30/Month)Stop paying $15-30/month (that's $180-360/year!) for legal document generators that store your company information on their servers.I was tired of TermsFeed's subscription model and LegalZoom's $100+ per document price tag. And every time I filled out their forms, my company details went to their servers. For a tool that should take 10 minutes, that's ridiculous.So I built something better.Privacy Poli
I Shipped a Feature in May. Nobody Could Reach It Until Yesterday.
I shipped a feature in May. Cross-page session memory for a retrieval agent — follow a link, the conversation comes with you. It was deployed, tested, and running in production.Yesterday I found out no visitor had ever been able to reach it. The part that was actually brokenThe obvious problem was that the chat widget existed on exactly one page out of thirty-nine. That is bad, but it is the kind of bad you notice.The real problem was underneath. The widget never sent a session_id field. Or
apis‑sendafun: Open‑Source Public‑API Directory on Cloudflare Workers
apis‑sendafun: Open‑Source Public‑API Directory on Cloudflare WorkersLooking for a quick way to browse and discover free public APIs?I built apis‑sendafun, a lightweight open‑source API directory running entirely on Cloudflare Workers.🔗 Live site: https://apis.sendafun.com📦 GitHub Repository: https://github.com/yusheng‑zhang‑star/apis‑sendafun📝 Release v0.1.0: https://github.com/yusheng‑zhang‑star/apis‑sendafun/releases/tag/v0.1.0 What it does‑ Browse hundreds of free public APIs‑ Ins
How I Vibe-Coded a Fast Client-Side N-Gram Analyzer for NLP & SEO
Hey DEV community! 👋Analyzing N-grams (Unigrams, Bigrams, Trigrams) is essential for spotting natural phrase patterns and evaluating linguistic structure in text. However, pasting long-form drafts into web tools that process data on backend servers often raises privacy concerns.To fix this, I vibe-coded a lightweight N-gram Analyzer that processes everything 100% in your browser. 🛠️ Key Technical Highlights:Zero Backend Latency: 100% client-side JavaScript execution. Text parsing, tokenizat
How I Built a Real-Time Football Stats Tracker: Relief for Iraola but Liverpool have work to do
How I Built a Real-Time Football Stats Tracker: Relief for Iraola but Liverpool have work to doTL;DR: Dominik Szoboszlai stood over the ball in the 99th minute at St James Park with Liverpools season, and Andoni Iraolas first competitive afternoon in charge, reduced to a single kick. Continue reading: Relief for Iraola but Liverpool have work to do The Data Behind the StoryEvery major football event generates thousands of data points in real time — xG (expected goals), shots on target
Analyzing Sports Data: Watkins departure would cut deepest and Villa did not see it coming — What the Numbers Say
Analyzing Sports Data: Watkins departure would cut deepest and Villa did not see it coming — What the Numbers SayTL;DR: Aston Villa lost 4-0 at Brighton on Sunday without a recognised centre-forward on the pitch or the bench. Victor Lindelof turned into his own net after eight minutes, Maxim De Continue reading: Watkins departure would cut deepest and Villa did not see it coming The Data Behind the StoryEvery major sports event generates thousands of data points in real time — perform
React WebSocket Performance: Buffer, Don't Render Every Msg
Stop Feeding WebSocket Streams Directly to React StateHot WebSocket streams are a common source of UI jank: you wire every incoming message to setState, and the app re-renders hundreds of times per second. That work is real — diffing, commit, layout — and the UI (inputs, animations, scroll) pays for it. The right 2026 best-practice for React WebSocket performance is simple: decouple the hot stream from the render path. Buffer messages, coalesce them on a display tick, and expose a subscrip
Why Your Content Security Policy Fails in Production: 5 Single-Page App Edge Cases
Every engineering team eventually receives a compliance ticket: "Missing Content-Security-Policy HTTP header."On paper, CSP looks simple: instruct the browser which origins can execute scripts, load stylesheets, or open network connections. You draft a basic policy, test your local build, and deploy.Then production breaks.Dynamic script chunks fail with Refused to execute inline script, telemetry streams to Sentry drop to zero, and third-party widgets fail to load. Modern frontend architectures
Architectural Breakdown: Can AI Remember What It Sees?
# Can AI Remember What It Sees? The 3 AM OOM That Taught Me Everything About Visual Memory SystemsAt 2:47 AM, my production cluster dropped from 120 fps across 26 cameras down to absolute zero. The culprit was an unbounded `asyncio.Queue` that ballooned to 14 GB in 11 seconds. The fix was not more RAM. It was treating hardwar
Bookshelf – Self-hosted eBook library that runs on object storage
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iCloud+ Hide My Email addresses will remain on icloud.com
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Moon (2024)
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Comparing prices across retailers is a unit-normalization problem, not a scraping problem
Disclosure: I'm the founder of Popgot, which I use as the example below. The problem and the approach apply regardless of what you build on.Every price comparison project I've seen starts the same way: scrape a bunch of retailers, store the prices, sort ascending. And then it produces garbage rankings, because price is not a comparable field.Here's the classic failure. Three listings for AA batteries:ListingPriceCountBrand A$5.9916Brand B$6.9920Brand C$11.9440Sort by price and Brand A "wins" at
Supabase Hangs After onAuthStateChange: The Deadlock
The bug report is always the same shape, and it never mentions authentication:After a while, every Supabase query in the app just hangs. No error, nothingin the network tab. Reloading fixes it for about an hour.Nothing rejects, so there is nothing to catch. The promise fromsupabase.from('profiles').select() simply never settles. Your try/catch isirrelevant, your error boundary never renders, and your loading state stays trueforever.If your app calls anything on the Supabase client inside anonAut
One corner of China’s internet is insisting that the Tang Dynasty never existed
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Vintage Artificial Intelligence: Before It Got Awkward
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JSON to Zod Schema Conversion: 5 Edge Cases That Break TypeScript Runtime Validation
TypeScript's static type system protects us during development, but it completely disappears at runtime. When your backend receives an incoming webhook payload, a microservice response, or user input from a form, writing const user = data as UserProfile offers zero actual safety. If a field is missing, renamed, or formatted unexpectedly, your application crashes downstream with the infamous TypeError: Cannot read properties of null.This is why Zod has become the gold standard for runtime schema
The Model Sent Perfect JSON. My Parser Only Accepted Naked JSON.
A few nights ago my side-project bot started crashing every few minutes. The logs all pointed at one line: a JSON.parse call that suddenly refused the model's output. The HTTP status was 200, the content field was full, and yet the parser threw before the bot could use a single word. My first instinct was to blame the model, and that instinct was completely wrong.I run this bot on MonkeyCode's free server, and its model calls go through MonkeyCode's free model access. Disclosure: This article wa
