Danny Holloran

Every browser storage API makes you trade something away. OPFS doesn't: sandboxed, no permission prompt, and synchronous byte-level file I/O inside a worker. It's the reason SQLite runs well on the web now. 🔗 danholloran.me/posts/opfs-a-r… #webdev #javascript

Nobody is on the other side of your DEX swap. A one-line formula sets the price, and that same math explains why liquidity providers can lose money while doing everything right. 🔗 danholloran.me/posts/how-auto… #defi #crypto

Community themes are all-or-nothing. A CSS snippet lets you fix the one thing that bugs you — heading size, callout padding, editor width — and leave everything else alone. 🔗 danholloran.me/posts/obsidian… #obsidian #pkm #css

Stop writing every color twice for dark mode. CSS light-dark() collapses both palettes into one declaration. Here's the color-scheme gotcha that trips everyone up 🔗 danholloran.me/posts/css-ligh… #css #webdev

Tap your card and it feels instant, but no money actually moves in that moment. Four companies and a fee called interchange are quietly settling up behind the scenes 🔗 danholloran.me/posts/how-a-ca… #fintech #payments

Turn your Obsidian vault into a live, searchable website with backlinks and graph view intact. No static site generator required 🔗 danholloran.me/posts/obsidian… #obsidian

The browser finally has a built-in router. URLPattern hit Baseline in late 2025: native, framework-free URL matching and parsing. Here's how it works 🔗 danholloran.me/posts/urlpatte… #webdev

Masonry layout is finally native — no more Masonry.js. CSS Grid Lanes ships as a new display value (Safari first), and it fixes the broken keyboard tab order JS libraries always had. 🔗 danholloran.me/posts/css-grid… #css #webdev

Market, limit, and stop orders each trade off price against execution differently. Here's how they actually work, with a worked example 🔗 danholloran.me/posts/order-ty… #investing #trading

Bases is Obsidian's built-in answer to Dataview: turn frontmatter properties into live, interactive tables and cards — no plugin to install, no query language locked in code blocks. 🔗 danholloran.me/posts/obsidian… #obsidian #pkm

Modals used to mean the same three lines of JS every time. Invoker Commands let a button say what it controls via command and commandfor — plain HTML, no listener. 🔗 danholloran.me/posts/invoker-… #webdev #html

Auto-growing textareas were a JavaScript rite of passage. One CSS line — field-sizing: content — now does it natively, on textareas, inputs, and selects. 🔗 danholloran.me/posts/css-fiel… #webdev #css

The bugs in agent-written PRs hide between files: dead exports, duplicate helpers, boundary drift. ESLint can't see them. Fallow maps your whole TS/JS module graph to catch them. 🔗 danholloran.me/posts/fallow-a… #webdev #typescript

Your Obsidian vault is just markdown files on disk — so Git, your terminal, and your editor all work on your notes too. Version it, get real syntax highlighting, run JS inline. 🔗 danholloran.me/posts/obsidian… #obsidian #pkm

Hit a Claude Code rate limit with zero warning? I built a status line that draws context + rate-limit usage as colored bars, plus a clickable repo link. 🔗 danholloran.me/posts/building… #claudecode #cli

The History API was never built for SPAs. The Navigation API finally is: one event to intercept every route, and it hit Baseline in early 2026. 🔗 danholloran.me/posts/the-navi… #webdev #javascript

Same theme, volume cranked to max. Grimicorn Neon keeps all eight semantic roles and just swaps in electric hexes, because colors are defined by role, not appearance. 🔗 danholloran.me/posts/grimicor… #webdev #css #theming

That little hitch after you click a button? Usually a long task hogging the main thread. scheduler.yield() breaks it up without the setTimeout penalty, and it's widely available now. 🔗 danholloran.me/posts/schedule… #webdev #javascript #performance

Ethereum doesn't need to execute every transaction — it just needs to verify them. That's the whole idea behind L2 rollups: do the work offchain, post the proof onchain, inherit mainnet's security. 🔗 danholloran.me/posts/layer-2-… #ethereum #crypto #web3

Color by role, not by name. One muted palette turned into matching dark + light themes for VS Code, terminals, Obsidian, Claude Code and 10 other tools — all from a single source of truth. 🔗 danholloran.me/posts/building… #webdev #css #theming