<h1> How to Fix CORS Errors in Node.js Fast</h1><p>Cross-Origin Resource Sharing (CORS) errors are common when your Node.js API talks to a front‑end served from a different origin. This guide shows you how to diagnose and fix them in minutes.</p><h2> 1. Understand the Error</h2><p>When the browser blocks a request</p>
We recently ran Lighthouse audits across 40 top B2B SaaS web applications. Over 65% of them were failing Interaction to Next Paint (INP) and Largest Contentful Paint (LCP) targets.The culprit? Legacy onboarding and changelog widgets injecting 120KB–250KB of uncompressed JavaScript on initial page load.Here is a benchmark breakdown and how to get in-app experience infrastructure down to under 4KB. The Hidden Cost of Enterprise Onboarding ScriptsLegacy tools like Appcues or Pendo were designe
I run boatbuildlog.com, a site where people keep a dated log of a boat they are building. Photos, notes and hours, entered day by day over the two or three years a build actually takes.The important thing about that sentence is where the typing happens. Not at a desk. It happens standing in a metal shed, a barn or a driveway, on a phone, with sawdust on it, on one bar of signal or none at all.Which makes the ordinary web assumption wrong. Normally a failed POST is an inconvenience and the user r
I Scraped 100 Football Matches — Here Is What I Found: Isak finally arrives as Gakpo proves value to LiverpoolTL;DR: Nine minutes at Portman Road on Friday night did more for Alexander Isaks Liverpool career than the 12 months that preceded them. The Sweden striker scored in the sixth minute Continue reading: Isak finally arrives as Gakpo proves value to Liverpool The Data Behind the StoryEvery major football event generates thousands of data points in real time — xG (expected goals),
Why Is disruptor Antonelli winning hearts in Ferraris Italy? Matters for Sports Data EngineersTL;DR: By Ahmad Ali, Sports Editor, SportsPortal.net On Friday morning at Monza, Charles Leclerc put a Ferrari on top of the timesheets and led Lewis Hamilton in a red one-two through Continue reading: Is disruptor Antonelli winning hearts in Ferraris Italy? The Data Behind the StoryEvery major formula 1 event generates thousands of data points in real time — gap to leader, lap time ms, tyre
Code: Megapixel99/lambda-languagelm is a small low-level language with four independent backends: C, WebAssembly, ARM64, and bytecode for a VM. Its test suite is built around the fact that there are four of them. Every program runs through all four and the outputs are compared byte for byte against each other and against a recorded expectation, so a backend that gets something subtly wrong disagrees with three that do not.That suite is at 94 tests: 22 lm programs and 10 examples across four back
I did not need another productivity system.I needed a smaller first step.That is why I built StartTiny: a free, open-source anti-procrastination tool that runs in the browser. No account. No backend. No ads. Tasks, notes, and settings stay in local storage.Live demo: https://g4hio.github.io/starttiny/Source: https://github.com/g4hio/starttinyThe actual problemMost of the time I was not stuck because the task was impossible. I was stuck because the first action was too big."Write the essay" is no
A print shop rejected a 4000 × 2667 px photo last week because the file "was only 72 DPI". The photo had more than enough pixels for the 8 × 10 in print they were making — at 300 DPI that size only needs 2400 × 3000. Nothing about the image was wrong. One integer in the file header was.This post is about where that integer lives, byte by byte, and why rewriting it doesn't touch a single pixel.DPI is metadata, not resolution"Resolution" gets used for two unrelated things:Pixel dimensions — how ma
Why I built AhoiWhen you want to manage data state in Rust/Wasm inside a web app, there havebeen two main options.Option 1: hand-roll the bridge between Rust and JS. The reactivity does notlive on the Rust/Wasm side, so you usually end up reimplementing the state layeron both sides.Option 2: use a Rust frontend framework such as Dioxus, Sycamore, or Leptos.I like these a lot, but there is a recurring pain point: sometimes JS is just better forweb dev. The large ecosystem of JS UI component
Building ToolVerve: A 100% Client-Side Web Utility SuiteHi DEV Community! 👋I'm a university student, and over the past 30 days, I dedicated my personal effort and focus to build ToolVerve—a privacy-first suite of 64+ free browser utilities that run 100% locally on your device. 🤖 Built with Personal Effort & AIBuilding a project of this scale in just one month was an incredible journey. As a university student, I leveraged modern AI tools alongside my own system design vision and h
Building a CRM dashboard is easy when the goal is just to make a few tables and cards look good.The harder part is making the interface feel like one coherent product.While building the CRM & Sales Pipeline UI Kit for StudioGrid Pro, I realized that the hardest part was not designing individual screens. It was making Dashboard, Contacts, Companies, Deals, Pipeline and Analytics feel like different parts of the same product.Here are seven of them. 1. Make the pipeline the center of the w
<a href="https://news.ycombinator.com/item?id=49582000">Comments</a>
# Zero-Data USB Tether Diagnostics: Why 11 Out of 14 Phones Hit 15 Mbps Until I Found One SettingEleven phones. Fifteen megabits per second. Exactly fifteen. Not fourteen. Not sixteen. The other three hit 106 Mbps for reasons none of the vendor docs explained.At 2:47 AM, with CI failing on an unrelated deployment and ADB statu
I spent an afternoon working out why 22 of 23 pages on a site I run were sitting in Google Search Console as "Discovered — currently not indexed."The answer turned out to be mostly "nobody links to you, you're a new domain, get in line." That part isn't interesting.What was interesting is what I found on the way there: every prerendered page on the site was shipping with three <title> elements, two <link rel="canonical"> tags, and two <meta name="robots"> tags. There was alread
You do not need five dashboards to ship a post. The loopWrite the manuscriptFlip the proofSend it to the presses that are actually connected A small exampleconst presses = ["blog", "devto", "wordpress"];console.log(presses.join(" · ")); What we refuseLocalhost is not a canonical URL. A pasted file is not a cover Dev.to can fetch.If a press needs a public URL, we omit the field instead of sending garbage.
IntroductionAsync/await has become the de‑facto way to write readable asynchronous code in JavaScript. Yet, when promises are chained incorrectly or when synchronous blocks wait for an async result, deadlocks can appear, freezing your Node.js process or browser tab. This guide walks you through the most common culprits and provides step‑by‑step troubleshooting techniques. 1. Recognize a DeadlockA deadlock usually manifests as:The event loop appears idle (no CPU usage) but the script n
I run LovePaper, a site where you write a letter to someone and it becomes a page with a permanent link. No account, nothing to install.Last week I wanted to know what people actually write on it. There are 14,905 letters in the database.This post is what I found, how I measured it without opening a letter, the one time I deliberately broke that rule, and the bug that almost made me publish a wrong number. The constraint came firstA love letter is the most private thing someone will type in
<a href="https://news.ycombinator.com/item?id=49580939">Comments</a>
Most conversational AI speech assistants have a fatal flaw: crippling latency.You ask a question, an audio buffer accumulates, an upload takes 2 seconds, speech-to-text takes another 3 seconds, and the LLM takes 4 seconds to respond. By the time an answer arrives, 8–10 seconds of awkward silence have passed. In a high-stakes interview or live presentation, that delay is unacceptable.Furthermore, most commercial interview tools force candidates to stream their raw voice audio, private resumes, an
<a href="https://news.ycombinator.com/item?id=49580369">Comments</a>
