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355 articles conservés pour « webdev »
I build a read-only crypto portfolio tracker, which means I spend a lot of time asking exchange APIs for old trades and finding out how little they will give me. We integrate 11 exchanges, and I keep one manifest of how far back each one will actually serve history. This post is…
Next.js headers() and cookies() in 2026: Dynamic APIs, Opt-Out Semantics, and the Static Rendering Traps Teams Hit This article was written with the assistance of AI, under human supervision and review. The most expensive Next.js performance regressions in 2026 trace back to a…
The October 23 shutdown got the headlines. Twelve model IDs, one deadline, a lot of us grepping at midnight. But the calendar didn't stop on the 23rd — and the person who pointed that out wasn't me. In the comments on the Oct 23 piece , reader shuttlewright sketched the next…
The client did nothing wrong, which is the part that took me a while to accept. It sent a request, got no answer, and sent it again, which is exactly what every HTTP client is told to do. The problem is that "no answer" covers two situations that look identical from the client's…
Short answer: allow the AI crawlers in robots.txt, serve your key facts as plain HTML text, add schema markup, and publish an llms.txt file: a short Markdown summary of who you are with links to your most important pages. A lot of "why doesn't ChatGPT mention us?" problems start…
This guide was drafted by an AI agent from the primary sources linked at the bottom, and has not been reviewed by a lawyer. It is general information, not legal advice. The original is at…
Connecting to guest Wi-Fi networks in hotels, cafes, and offices has become ubiquitous through Wi-Fi QR codes. However, standard smartphone cameras often parse these codes silently without displaying the raw credentials, and many mobile scanning apps aggressively monetize or…
Security headers are the cheapest hardening a website can get: a handful of response headers that tell the browser to stay on HTTPS, refuse to run injected scripts, refuse to be framed by another site and stop guessing content types. They're also easy to forget, and they quietly…
A Base64 image that will not display is one of the least informative failures in web development. You get a broken-image icon, or an empty box, or nothing at all — and the browser console is silent. There is no exception to catch, because the browser did exactly what it was…
Hace unos meses empecé un proyecto personal: PhotoCut , un editor de fotos que quita el fondo con IA sin subir la imagen a ningún servidor . Todo corre en el navegador: la IA, el recorte y la exportación. La idea salió de una molestia concreta: los removedores de fondo gratis…
Imagine building a modern web application or content platform that showcases thousands of images and video assets. In a local development environment, everything renders smoothly. However, as soon as the application is tested across diverse devices, screen sizes, and network…
When building an automotive or commercial vehicle price comparison engine, the biggest data bottleneck isn't scraping or API rate limits—it's inconsistent OEM and OES part numbers across different supplier feeds. While building the catalog pipeline for CrazyPartSnatcher (a…
Have you ever waited for your food and wondered, “Is my order ready yet?” That simple question inspired me to build Jahez , a web application designed to make restaurant order tracking easier for both customers and staff. 💡 The Idea Behind Jahez The idea is simple: restaurant…
A post made the rounds on X this week. A developer says OpenAI shut down his account. His story: he was running a log4j decompiler on his own machine, for his own work. The deactivation email called it "Cyber Abuse". We can't verify his story. Take it as his account, not…
Current VAT Rate vs Transaction-Date VAT Rate: Why the Difference Matters A VAT rate lookup usually starts with a simple question: What is the VAT rate for this country and product? But there is another question that matters just as much: For which date? If you are calculating a…
A business website is often the first place a potential customer looks for information. For a salon, a good website should make it easy to understand available services, find essential details, and figure out how to schedule an appointment. Building that experience involves more…
Black Friday Cyber Monday 2026 is November 27–30. If you manage or build on Shopify stores, you have about four weeks to find the things that will break under peak load. Most BFCM guides tell you to compress images and check your theme's PageSpeed score. That's not wrong — but…
Let’s get one crucial fact straight from the very beginning: Artificial Intelligence is not going to replace the human designer. However, the designer who knows how to collaborate with AI will easily outperform the one who doesn't. In modern digital workflows, AI has become the…
A travel brief often mixes the trip itself with meeting context, preferences, and unresolved decisions. A short summary can help the person review it before requesting proposed form changes. That is a useful place for Chrome’s Summarizer API: a bounded reading aid beside an…
TL;DR: Babelize parses every file with a Babel AST, extracts only user-facing text (whole JSX sentences become ICU messages with placeholders, tags and plurals), names keys from the file path and first words, hashes source text into a lockfile so reruns only translate what…
https://postjson.com A lot of browser-based developer utilities look like generic web pages. postjson.com follows the layout and interaction paradigm of classic macOS native apps, rather than copying keyboard shortcuts. If you’re used to the rhythm of small Mac utilities: split…
I built Nitron to turn web projects into mobile apps with npm You have a website built with HTML, CSS, and JavaScript. It works, it looks good, and you're happy with it. Now you want an Android or iOS app. Do you really want to start a whole new mobile development workflow just…
If you build websites for local trades, painters are a good client: they have real work to show and a clear goal, which is booked estimates. But they are easy to over-scope. Here is how I break down a painting contractor site so the budget goes where it earns leads. What the…
I build a customizer for printed sneakers. You upload an artwork, it gets split across the leather panels of a shoe, and you see the result on the actual shoe before buying. The geometry is the interesting part — that's the first post and the second . This post is about the…
When building profile aesthetics on social platforms, creators often run into a frustrating quirk with TikTok's sticker grid feature. If you take an image, crop it into a standard 3x3 grid (like PineTools or traditional photo splitters do), and upload them as stickers, the…
A tool directory sounds simple: store some links, put them into categories, and add a search box. Then you start adding tools. You need individual pages, pagination, working links, useful descriptions, and a way to ship updates without turning the project into a maintenance job.…
👋 Hey DEV Community! Have you ever tried setting up a WhatsApp CRM for your startup, agency, or side project? If you have, you’ve probably hit the grim reality of the current WhatsApp SaaS ecosystem: 💸 Insane Seat-Based Pricing: Paying $50 to $150 per agent per month just to…
A group photo can be almost perfect: good light, everyone in the frame, a moment worth keeping. Then you notice that one person blinked. For a developer, this looks like a small image-editing task. But the real requirement is more demanding: Open the eyes while preserving…
This is a submission for the Hacktoberfest Open-Source AI Challenge Week 3: Slow and Steady What I Built I built the first esport for lying down. There is no controller. No keyboard. No skill tree. You give the browser permission to use your webcam, lie down, and try to stay…
Most landing-page advice comes as a template: a hero of a certain height, three feature cards, a testimonial strip, a pricing table, an FAQ. Templates are quick to fill in, but they don't tell you whether the page answers the questions its visitors actually have. That's the gap…
Claude Code File System Boundaries in 2026: What --add-dir , Allowed Paths, and Sandbox Roots Actually Restrict This article was written with the assistance of AI, under human supervision and review. The Filesystem Permission Model Nobody Reads Teams enable Claude Code in…
I shipped twelve apps last year. I can tell you, instantly, which one I'm proudest of — clean architecture, actual tests, a Lighthouse score I'd put on a business card. And I can tell you which one actually changed my career. They are not the same app. They're not even in the…
Software acceptance testing works best when the person signing off can read the tests themselves. With Playwright, you get there by writing each acceptance criterion as a Given/When/Then step, attaching a screenshot to every step and handing over the HTML report as the sign-off…
A client sends a Hindi Word file, you paste it into a web page, and it reads dk;kZy; vkns'k instead of कार्यालय आदेश. By the end of this post you'll have a ~70-line JavaScript converter and four tasks done with it: a Word office order, a CSV column, a half-fixed column, and the…
An expired SSL certificate is one of the most avoidable outages on the web. The site is fine, the server is fine, but every visitor gets a full-page browser warning and most of them leave. Less dramatic certificate problems, like a missing intermediate certificate, are worse in…
Plenty of small businesses want a "tap here to review us" card or sticker at the counter. Doing it yourself takes a few dozen lines of JavaScript, a few cheap NTAG stickers and an Android phone. You do have to watch a few details: which URL you write, whether it fits on the…
Every slicer has a moment where it pops up "this model has errors" and offers to fix them. Most of the time you click yes, the print comes out fine, and you never think about it again. But when the auto-fix guesses wrong (a vent sealed shut, two parts fused, a wall that just…
On October 21, Node.js shipped security releases for a flaw that deserves your immediate attention: CVE-2026-111497 , nicknamed Node2Shell . It is an out-of-bounds write in the Brotli decoder bundled with Node.js, scored 9.2 Critical under CVSS v4.0. One day after disclosure,…
I am a senior full-stack developer in Skardu, Pakistan. A lot of my client and product code lives in private repos, but the public side of my GitHub is bigger than I realised, and until this week almost none of it had been shown to anyone. Here is what is actually public and…
Originally published on PkLavc . Confirmed facts AWS Continuum for code vulnerabilities is now generally available as of October 22, 2026. The service discovers, validates, prioritizes, and remediates code vulnerabilities at machine speed. It constructs a context graph from the…
For almost four years I worked as a full-stack developer on a large WordPress site. It combined e-commerce and e-learning, and over time it grew to more than 60 plugins. By the end, even simple changes were stressful. A theme update could break a page, a plugin update could…
A plugin changelog is the short record of what changed between releases. It is easy to skip. On a site that depends on a handful of plugins, those notes are often the only warning you get before a form, a checkout, or an admin screen starts behaving differently. Start at the…
Every month I talk to Pakistani business owners who want to sell online. A clothing brand in Karachi that's outgrown Instagram DMs. A wholesaler in Lahore tired of taking orders on WhatsApp. A home-based bakery that wants a proper checkout. I'm Muhammad Ali Mughal, and I run…
A robot that climbs a window, maps a pool or scrubs a floor looks like a single black box from the outside. From the inside, it is a small embedded system built from four layers — sensing, navigation, execution and communication — plus the safety and power systems that hold them…
Every few months a team decides to rebuild its internal APIs on gRPC. Ask why, and the answer is usually a benchmark graph from a blog post. Ask what problem it solves for them, and the room goes quiet. gRPC is a good tool. REST is a good tool. They solve different problems, and…
Building Blocks for the Web: Unleashing the Power of Custom Elements and Templates Hey there, web wizards and aspiring code slingers! Ever felt like HTML just doesn't have enough oomph for your grand designs? You've got this brilliant idea for a reusable component, something…
One of the biggest traps in software development is believing that the next project has to be revolutionary. It doesn't. A small project that gets finished can teach more than a huge project that remains unfinished. Start With a Problem Instead of asking: What is the most…
So you put a Django app behind a reverse proxy that handles HTTPS (nginx, Traefik, Caddy, a PaaS router, a load balancer), open /admin/ , type the right username and password, and get this: Forbidden (403) CSRF verification failed. Request aborted. Origin checking failed -…
You’re capturing the referral object from WhatsApp Click-to-WhatsApp ads, but revenue-per-ad numbers still look wrong. These are the usual reasons. Referral not saved It only arrives with the first message from an ad click. If your webhook handler skips it, or only processes…
Introduction Building reservation software often seems deceptively simple: collect a guest's name, party size, date, and desired dining time, then write a record to a database. In practice, hospitality operations present a complex constraint-satisfaction challenge. Unlike…