Verifying a white background programmatically (and the two export mistakes it catches)
Marketplace image checks are usually automated, and "looks white" is not the same as "is 255,255,255". If you process product photos in a browser, t…
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Exporting a print-ready A4 PNG and PDF entirely in the browser
Parents and teachers print coloring pages at home on ordinary printers. That sounds simple until you try it: a drawing that looks fine on screen com…
Building a 60fps Canvas Frustum Camera for 4K System Architecture Presentations
When presenting a complex enterprise topology—whether it's a multi-region Kafka cluster, a distributed consensus state machine, or an intricate doma…
Inside a pupa you can rewind: deriving every frame from t alone (Canvas 2D)
A caterpillar becomes a pupa and then an adult. Inside the pupa, much of the larval body breaks down and the adult body is rebuilt. I made a page th…
Building a Drawing App with Canvas — Smooth Lines, Undo, and Shape Tools
Building a Drawing App with Canvas — Smooth Lines, Undo, and Shape Tools A drawing app is a great Canvas project. Here's how to get smooth lines, im…
Cheap bloom for a Canvas 2D game in 8 lines (no WebGL)
Neon games look flat without bloom: the soft light that bleeds around bright things. The usual advice is "switch to WebGL and write a post-process s…
How OmniGIF Removes GIF Backgrounds Entirely in the Browser
Most "remove GIF background" tools upload your animation to a server, run a keying model, and send back a file. OmniGIF's Remove Background from GIF…
Splitting a large image across multiple printed pages without alignment marks
I recently added tiled printing to a small static tool I run ( ArtGrid ) — the kind of "print a big image across several A4 sheets and tape them tog…
BeatDesign is a local, open-source Higgsfield Canvas any MCP agent can drive
BeatDesign is a local, open-source Higgsfield Canvas. Codex, Claude Code, Cursor, or any other MCP-capable agent can operate the same canvas. If you…
Building a fullscreen countdown timer in vanilla JS: accurate time, Wake Lock, and a WebAudio alarm
Timers look trivial until you actually build one that people rely on. "Just setInterval and decrement a number," right? That gets you a timer that q…
4 ways canvas text rendering breaks in multilingual apps (that en/ja testing will never catch)
I run a large fleet of "preview it, then download it as PNG" web tools — name tags, certificate generators, price cards, badges — in five languages:…
The Share Button Is the Product: Engineering a Viral Loop in Vanilla JS
Most of us treat the share button as the last checkbox before shipping: drop in a navigator.share call, maybe a Twitter intent URL, done. I did that…
Breaking the 100k Row Limit: Building High-Performance Dynamic Grids with VyncCanvasScroll in Vue 3
The Million-Row Challenge in Modern Web Apps When dealing with massive enterprise datasets—like Amazon SKU multi-account performance metrics or high…
I Built Pong in 60 Lines of JavaScript — Five State Variables and a setInterval
🌐 Live demo (LOOK · UNDERSTAND · BUILD): https://dev48v.infy.uk/game/day2-pong.html Day 2 of my GameFromZero series — 50 playable mini-games in 50 d…
Chaos erupts as cyberattack disrupts learning platform Canvas amid finals
Across the country, schools and colleges postpone year-end tests.