📰 Dev.to · tommy

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All Articles 97,840 Blog Posts 113,726 Tech Tutorials 24,691 Research Papers 20,521 News 15,626 ⚡ AI Lessons

I Built a Skitch Alternative 2 Months Ago. It Now Has Twice the Tools.

Dev.to · tommy 2mo ago

I Built a Skitch Alternative 2 Months Ago. It Now Has Twice the Tools.

There's no pen tool. I found a bug, took a screenshot with my own tool, drew an arrow, placed some...

I Added 5 Drawing Tools to My Canvas App. Undo Almost Killed It.

Dev.to · tommy 3mo ago

I Added 5 Drawing Tools to My Canvas App. Undo Almost Killed It.

The best part of building your own tools is that you can add whatever you want. I was filing a bug...

What If the Page Could Detect Data Formats Without Copying? — Adding Page Scan + JWT Detection to a Chrome Extension

Dev.to · tommy 3mo ago

What If the Page Could Detect Data Formats Without Copying? — Adding Page Scan + JWT Detection to a Chrome Extension

The Limits of Clipboard Detection In my previous article, I built a Chrome extension that...

I Built a JWT Decoder and Lost Half a Day to atob()

Dev.to · tommy 3mo ago

I Built a JWT Decoder and Lost Half a Day to atob()

During development, I constantly need to check what's inside a JWT. Every time, I'd open jwt.io,...

I Built a Unix Timestamp Converter and Stepped on 3 JavaScript Date API Landmines

Dev.to · tommy 3mo ago

I Built a Unix Timestamp Converter and Stepped on 3 JavaScript Date API Landmines

An API response returns 1709654400. Can you tell what date that is at a glance? I couldn't. Every...

I Implemented Myers Diff in 130 Lines, Then Lost Half a Day to an Off-by-One Bug

Dev.to · tommy 3mo ago

I Implemented Myers Diff in 130 Lines, Then Lost Half a Day to an Off-by-One Bug

I Didn't Want Another Dependency I could have installed a diff library and been done in...

Share Tool State via URL Hash Alone -- Designing 'Recipe URLs'

Dev.to · tommy 3mo ago

Share Tool State via URL Hash Alone -- Designing 'Recipe URLs'

Ever been in this situation? "Hey, can you check this Base64-decoded result for me?" You...

Building a JSON Formatter: Zero-Click Auto-Format and the Clipboard API Trap

Dev.to · tommy 3mo ago

Building a JSON Formatter: Zero-Click Auto-Format and the Clipboard API Trap

When an API response comes back as a single line, what do you reach for? Open...

I Searched for a Skitch Alternative, Then Built One in a Day — A PWA Image Annotation Tool

Dev.to · tommy 3mo ago

I Searched for a Skitch Alternative, Then Built One in a Day — A PWA Image Annotation Tool

I just wanted to draw one arrow on a screenshot and paste it into a chat. That's it. Why does it...