📰 Dev.to · Dev Nestio

8 articles · Updated every 3 hours · View all reads

All Articles 99,885 Blog Posts 115,211 Tech Tutorials 25,231 Research Papers 20,779 News 15,817 ⚡ AI Lessons

I Built a Unit Converter in Pure Vanilla JS — 7 Categories, 70+ Units, 165 Tests, Zero Dependencies

Dev.to · Dev Nestio ⚡ AI Lesson 5h ago

I Built a Unit Converter in Pure Vanilla JS — 7 Categories, 70+ Units, 165 Tests, Zero Dependencies

Unit converters are everywhere online, but they all seem to either require an account, run ads that...

I Built a Text Diff Tool in Pure Vanilla JS — Myers Algorithm from Scratch, 129 Tests, Zero Dependencies

Dev.to · Dev Nestio 📐 ML Fundamentals ⚡ AI Lesson 5h ago

I Built a Text Diff Tool in Pure Vanilla JS — Myers Algorithm from Scratch, 129 Tests, Zero Dependencies

Every developer ends up needing to compare two blocks of text at some point — a config before and...

I Built a Visual Chmod Calculator in Pure Vanilla JS — Checkboxes ↔ Numeric ↔ Symbolic, 222 Tests

Dev.to · Dev Nestio 10h ago

I Built a Visual Chmod Calculator in Pure Vanilla JS — Checkboxes ↔ Numeric ↔ Symbolic, 222 Tests

Every Linux and macOS developer has typed chmod 755 on autopilot — but what does 7 actually mean? Why...

I Built a Browser-Only HTML Entity Encoder/Decoder — Named, Decimal & Hex, 246 Tests

Dev.to · Dev Nestio 10h ago

I Built a Browser-Only HTML Entity Encoder/Decoder — Named, Decimal & Hex, 246 Tests

Every developer has hit this: you need to escape <, >, &, and quotes before dropping user...

I Built a Color Picker & Palette Generator in Pure Vanilla JS — No Libraries, 187 Tests

Dev.to · Dev Nestio 10h ago

I Built a Color Picker & Palette Generator in Pure Vanilla JS — No Libraries, 187 Tests

Every designer and developer has been there: you have a brand color and need a palette that actually...

I Built a QR Code Generator in Pure Vanilla JS — No Libraries, No Server, 202 Tests

Dev.to · Dev Nestio 11h ago

I Built a QR Code Generator in Pure Vanilla JS — No Libraries, No Server, 202 Tests

QR codes look like magic — a grid of black and white squares that encodes anything from a URL to a...

I Built a UUID Generator Using crypto.randomUUID() (Why Math.random() Is the Wrong Choice)

Dev.to · Dev Nestio 11h ago

I Built a UUID Generator Using crypto.randomUUID() (Why Math.random() Is the Wrong Choice)

UUID generators are everywhere. Most of them work. But a surprising number use Math.random() under...

I Built a Real-Time Regex Tester in the Browser (Capture Groups, Flags, No Libraries)

Dev.to · Dev Nestio 11h ago

I Built a Real-Time Regex Tester in the Browser (Capture Groups, Flags, No Libraries)

Writing regular expressions without instant visual feedback is like writing code without a compiler —...