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Real files and native sharing from a web app — File System Access & Web Share (FieldKit #5)
This is part 5 of FieldKit, a series where I build one real Progressive Web App and use it to dig into what modern PWAs can actually do. FieldKit is a field-notes app — open source (on GitHub). It already works offline, installs, captures media, and geotags notes. Now we let data flow in and out: export/import as real files, and share notes with other apps. Data that can't leave is data you don't ownA field journal is only trustworthy if you can get your data out — back it up, move it to an
How to Monitor MAP Violations?
How to Monitor MAP Violations Across #Amazon and Online Retailers?Are retailers or Amazon sellers advertising your products below MAP?In this video, you'll learn how to monitor MAP violations across Amazon, Google Shopping, marketplaces, and independent online retailers — without manually checking thousands of product listings.We'll cover:✅ What a MAP violation is✅ How automated MAP monitoring works✅ How to monitor MAP violations on Amazon✅ Why seller-level and Buy Box monitoring matters✅ How Go
I Built a Free Testimonial Collector (Because Yotpo Charges $249/Year)
I Built a Free Testimonial Collector (Because Yotpo Charges $249/Year)Stop paying $249/year for testimonials when you just need to collect a few customer quotes for your website.I was tired of Yotpo's subscription model — $249/year for what is essentially a testimonial widget. And every time I collected a testimonial, my customer data went to their servers. For a tool that should take 5 minutes, that's ridiculous.So I built something better.Quote & Testimonial Collector runs 100% in yo
I Built a Free Proposal Generator (Because Proposify Charges $29/Month)
I Built a Free Proposal Generator (Because Proposify Charges $29/Month)Stop uploading your client proposal data to the cloud just to create a proposal document.I was tired of Proposify's pricing model — $29/month for what is essentially a proposal template editor, and every time I filled out a proposal form, my client's project data went to their servers. For a tool that should take 10 minutes, that's ridiculous.So I built something better.Freelancer Proposal Generator runs 100% in your br
The bug your test cannot see
Here is a function. It has one job: give me the three highest scores.function topThree(scores) { scores.sort((a, b) => b - a) return scores.slice(0, 3)}It works. topThree([72, 98, 64, 91, 87, 55]) returns [98, 91, 87], which is correct. It throws nothing. It has a test, and the test is green.Now watch what happens when real code calls it.const names = ["Ada", "Bo", "Cy", "Di", "Eve", "Fay"]const scores = [ 72, 98, 64, 91, 87, 55 ]const pair = (n, i) => n + " " + scores[i]c
Three public HTTP APIs I read daily without registering for a key
My daily trends fetch is a Node.js script that runs in GitHub Actions, hits three APIs, and writes a JSON file that feeds my X-drafts pipeline later in the day. None of the three sources require an API key. No OAuth flow, no dashboard signup, no rate-limit token to rotate.That sounds trivial, but it matters for CI pipelines. Every API key stored in GitHub Secrets is a secret that can expire, a secret that has to be rotated when a team member leaves, a secret that creates a failure surface. Keyle
Gyroscope tilt steering (mobile)
Devlog — Gyroscope tilt steering (mobile)Date: 2026-08-10Author: pj90 (weirdcodesofficial)Commit: 947f78d3e9474549c86db5dae7d199cdd9ca0712Closes: #28 SummaryAdded device-tilt (gyroscope) steering for mobile so players can control the chariot (ratha) using the DeviceOrientation API. The feature includes iOS 13+ permission flow, baseline calibration, a configurable deadzone to avoid accidental steering, a HUD button for enable/re-calibrate, and i18n strings + UI alerts. What change
The 2026 React Native Performance Playbook (New Arch, FlashList, Reanimated 4)
TL;DRMeasure first. A before number and an after number in every PR beats every trick in this post.Turn on the New Architecture. Biggest single win available: ~40% faster cold start, 35 to 43% faster list rendering, ~25% lower memory.Confirm Hermes is on in your release build, not just dev, and upload your source maps.Swap FlatList for FlashList past ~50 items.Every animation goes to Reanimated 4 worklets. No exceptions.Put a budget in CI with Flashlight so regressions break the build inst
Why every "calories burned" calculator boils down to one formula (I found this out because my own copy button was lying to me)
I built a little MET-based calorie table — type in your weight and how long you exercised, get calories burned for 178 different activities, from mountain biking to sitting on the couch. While testing it I clicked the calorie cell to copy the number to my clipboard, and the value that landed in my clipboard didn't match the number on screen. Not a rounding difference — a completely different number. Chasing that down taught me more about how these calculators actually work than building the form
How does Drizzle handle migrations - Part 2: Changing database structure
Drizzle is built for that. You change the TypeScript schema, Drizzle generates a new migration that alters your SQLite/D1 tables, and you apply it with Wrangler. High-level loop:Edit TS schema (add/rename/drop columns, tables, indexes, constraints).npx drizzle-kit generate → emits a new migrations/00xx_*.sql diff.Review the SQL (important for destructive changes).Apply it: wrangler d1 execute DB --local/--remote --file migrations/00xx_*.sql.Because D1 is SQLite, some changes are done via table r
How ReactJS Can Improve User Experience and Boost Your Bottom Line?
Most content about ReactJS and business value follows the same template: virtual DOM makes it fast, components make it reusable, fast and reusable means good for business. The logic isn't wrong, but it's so compressed it's not actually useful for anyone making a real decision.Here's a more specific version — breaking down each business outcome React affects, explaining the actual mechanism, and including the cases where React isn't the obvious answer. Virtual DOM → UX → Conversion: The Chai
Resilient UIs: Next.js Error Handling & Observability 🚨
The Silent Failure of the SPAIn traditional server-rendered applications (like old-school PHP or Ruby on Rails), if a backend script failed, the server returned a 500 Internal Server Error page. It was ugly, but it was explicit. The user knew something broke, and the server logs immediately captured the stack trace.In modern React Single Page Applications (SPAs), errors are far more insidious. Because the application runs entirely in the user's browser, an unhandled JavaScript exception in a dee
Long-Run Effects of H-1B Immigration on the U.S. Economy (July 2026)
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Server vs Client Components in Next.js 16 (2026 Guide)
You add "use client" to the top of a file, TypeScript stops complaining, and everything just... works. So you start adding it everywhere — every component, just in case. A few weeks later your bundle size has crept up, your pages feel sluggish, and you're not sure why, because "it's just React, right?"It's not just React. The App Router split every component into one of two worlds — Server Components and Client Components — and that split is the single biggest architectural decision in a modern
Auto mode is now the default in Claude Code
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Show HN: Voice driven murder mystery, Interview AI suspects with your voice
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Run Android ARM64 VR APKs on Apple Vision Pro
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Turn satellite imagery into a paper globe you fold yourself
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What Happened to HackerOne?
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