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How to Monitor Your Fastify.js API with Vigilmon
How to Monitor Your Fastify.js API with VigilmonFastify is one of the fastest Node.js web frameworks — it processes thousands of requests per second with minimal overhead. But performance doesn't protect you from infrastructure failures. This guide covers monitoring your Fastify API with Vigilmon. Why Fastify APIs Need External MonitoringFastify's high throughput means failures affect more users faster. When a Fastify API goes down:Millions of requests/hour suddenly failError rates sp
Writing an HTML entity encoder from scratch: which chars really need escaping, and why you iterate by code point
HTML has exactly five characters that mean something to the parser: & starts a reference, < and > delimit tags, and "/' delimit attribute values. If any of those appear literally in text you didn't intend as markup, the page breaks — or someone injects a <script>. The fix is a character reference (an "entity"). Let me build a lossless, two-way encoder/decoder in under 100 lines, no library, and clear up what actually needs escaping. An entity is a character referenceIt alway
The ellipsis truncation algorithm: how a pagination bar stays a fixed width no matter the page count
Every table footer, search-results strip and comment feed uses the same control: a long list cut into pages with a compact bar to move between them. The interesting part isn't the buttons — it's the 1 … 4 5 [6] 7 8 … 20 truncation that keeps the bar a fixed width even at ten thousand pages. Let me walk through building it from scratch, no framework. The whole control is two numbersThe real state is page and pageSize. Everything else is derived, never stored, so the table and the button bar
Building Bomberman from a grid of integers: a 2-second fuse, a cross-blast raycast, and BFS hunters
Bomberman looks like it needs sprites, a physics engine, and enemy scripting. It doesn't. The entire game is a 2D array of integers plus three ideas: a countdown, a raycast, and a breadth-first search. Here's how each piece works, in about 250 lines of vanilla JavaScript on one canvas. The arena is just numbersThe whole board is grid[row][col] holding one of three values: 0 floor, 1 unbreakable stone, 2 a destructible crate. The classic layout isn't random — the outer ring is stone, and the
JSON in Node.js: Mastering Data Exchange for Developers
Originally published on FreeDevKit.Understanding JSON in Node.js JSON (JavaScript Object Notation) is a lightweight, human-readable data-interchange format that is fundamental to modern web development, particularly within the Node.js ecosystem. It serves as the primary format for transmitting data between a server and web applications, facilitating communication in RESTful APIs, configuration files, and data storage. Its simplicity and direct mapping to JavaScript objects make it exceptionally
Keyframes on scroll: how we built a native timeline into a web builder
Most web builders produce static pages. If you want motion, you reach for a library, a plugin, or hand-written code. We took a different path and built the motion system into the builder itself: a native timeline, where any setting can be keyframed and driven by scroll. This is how it works. The core idea: two states and a scrollA typical builder gives you a few canned transitions: fade in, slide up, a hover state. Useful, but closed. You get what the menu offers.Instinctor's timeline is de
DOM(part-10)
To Do List<!DOCTYPE html><html><head> <title>To Do List</title> <style> body{ border: 1px solid black; width: 400px; height: 400px; margin: 0 auto; display: flex; flex-direction: column; /* justify-content: center; */ margin-top: 100px; padding-bottom: 100px; } /* .box{ background-color: lightblue; border: 1px soli
I Built a CLI Image Compressor — 73% Smaller in 0.1s
I just shipped compressfast — a command-line image compressor that runs entirely on your machine. No uploads, no API keys, no limits.One command: npx compressfast photo.jpg --quality 80What it does:Compress JPEG, PNG, WebP, AVIFBatch process entire foldersResize while compressingWatch mode for automatic processingAll local — files never leave your machineReal results: 141.6 KB → 37.4 KB (-73.6%) Time: 0.1sBuilt with: Sharp (libvips) — the fastest image processing library for Node.js.npm: np
RollDate v1.1.0 is now available
This release introduces several features requested during development:Highlighted dates with optional custom colorsMultiple dots per day for events and bookingsDynamic range presetsImproved range stylingNew API methods (goToDate, getValue, setValue, getViewMonth)The goal of this release was to make RollDate more useful for booking systems, dashboards and scheduling applications while keeping the library lightweight and dependency-free.Demo:https://rolldate-demo.vercel.app
Optimise Revenue Operations and Business Processes
Organisations are increasingly adopting cloud-based revenue management solutions to streamline sales operations, improve pricing accuracy, and deliver exceptional customer experiences. Salesforce Revenue Cloud enables businesses to manage the complete revenue life cycle from product configuration and quoting to contracts, subscriptions, renewals, and order management. The Salesforce Revenue Cloud Business Consultant (Rev-Con-201-BC) certification validates the knowledge and practical skills requ
Understanding Interaction Dialogue Models (IDM) in Web Architecture
When building modern full-stack web applications, developers often spend hours optimizing component render trees, state managers, and API endpoints. However, we frequently gloss over a fundamental question: How does the user visually and logically navigate complex system conversations?In complex applications, a User Interface (UI) is more than static pages—it is a continuous, bi-directional dialogue between the user and the software. To model these complex interactions effectively without buildi
Build a Browser‑Based Favicon Generator with React, TypeScript, and Tailwind
Favicraft is an open‑source, no‑login favicon generator that runs entirely in the browser. It lets you design text‑based favicons, upload images, or check any website's favicon – and export a complete package with every required size, manifest, and framework snippet. No sign‑up, no server uploads.In this article, I'll walk through how Favicraft works, its tech stack, and the key implementation details that make it powerful and easy to use.Why Favicraft?Favicons are a tiny but critical part of we
MiniMax H3 Day-0 Support in ComfyUI: Open Weights, Native Audio, and 2K Video
<a href="https://news.ycombinator.com/item?id=49155629">Comments</a>
SPF Record Syntax: Mechanisms, Qualifiers, Modifiers, and Macros
<a href="https://news.ycombinator.com/item?id=49155626">Comments</a>
Hooked on Adventure: Mastering React's useState and useEffect Like a Jedi
The Quest Begins (The "Why")Honestly, I remember staring at a component that refused to update when the user typed into a form. I’d set a variable, change it, and… nothing. It felt like trying to cast a spell without saying the incantation—frustrating and pointless. I kept thinking, “Why isn’t React listening to me?” The problem wasn’t React; it was my mental model. I was treating state like a regular JavaScript variable and expecting the UI to magically follow. That’s when I realized I ne
How the Repository Pattern Helped Us Migrate from REST to GraphQL Without Breaking Everything
The Challenge I FacedIn our recent project, we started with a traditional REST API backend. The application was growing rapidly, and we realized we needed to migrate to a more flexible GraphQL API to reduce over-fetching and under-fetching issues.The problem? Our components were tightly coupled with REST API calls. Changing to GraphQL meant touching every single component that fetched data.Solution?but we had implemented the Repository Pattern from the very beginning, we were able to switc
How a Reading Problem Turned Into a Listening App
For the past few months, I've been working on a listening app, and I'd like to take you along for the journey — from where it all started to where it's going.Through this series, I'll share the ideas, challenges, mistakes, and small victories that have shaped Orateur.But before we dive into the technology, let's go back to the very beginning. How did the idea come about?Like many people, I subscribe to several newsletters and receive dozens of interesting articles every week. Every time I s
React Concurrent Rendering: Scheduling, Interruptions, and Debugging Suspense Boundaries
You know that moment when your React Suspense fallback jumps on the screen, then disappears, then reappears, leaving you wondering if you did something wrong? I’ve been there , seeing flickers, multiple loading spinners, or even UI glitches around Suspense felt like chasing ghosts. Turns out, React’s concurrent rendering scheduler is doing a lot behind the scenes , juggling priorities, pausing work, and restarting it , and Suspense boundaries are right in the middle of this dance. Understandi
How to Monitor Your Next.js App with Vigilmon (SSR, API Routes, Edge Functions)
Next.js is the most popular React framework for production apps. It runs server-side rendering, API routes, edge functions, and static pages — and each of those layers can fail independently.This guide shows how to add external uptime monitoring to your Next.js app with Vigilmon, covering all the layers that matter: SSR pages, API routes, and edge deployments. Why Next.js Apps Need External MonitoringNext.js apps have more failure modes than static sites:SSR pages can fail if your data fe
What if students could edit a real React app before they can even write one?
Most React courses teach in the same order. Syntax first. Then hooks. Then a small app. Then, somewhere near the end — if there's time — how a real project is actually organized.I understand why. You can't explain a provider tree to someone who doesn't know what a component is. The order makes sense on paper.But there's a gap in the middle that nobody really covers, and I think it's the reason so many people finish a course and still feel like they can't read real code. Reading code and und
