Daily edition · JavaScript
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49 articles · 3 sources ·
Top topics: JavaScript · React · AI
Why a Voice‑Powered News Reader? Reading the headlines while you’re on a commute, cooking, or just resting your eyes can be a game‑changer. With a few APIs and a little JavaScript or Python, you can turn any RSS feed or…
A scanner that cries wolf gets switched off. So we pointed Zelsis at the code of several mature open-source SaaS products and read every high-severity finding by hand. Most of them were wrong. The code was protected,…
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You convert 9:00 AM New York time to Karachi time. It works in July. In December, your users tell you it's an hour off. Nothing is wrong with your math. The bug is an assumption: that the gap between two time zones is…
If you have ever embedded a third-party widget in an iframe, you know the two failure modes: an inner scrollbar that swallows half the widget, or a 2000-pixel-tall frame with 400 pixels of content. The usual fixes are…
Want your 2D HTML5 browser game to feel like an arcade hit? You don't need a physics engine—just a 6-line canvas translation shake inside your render loop. The 6-Line Screen Shake Trick let shakeIntensity = 12; function…
A tracking request containing [PAGEURL] tells you that a substitution did not happen before that request left the system. It does not tell you which component should have performed it. That ownership question becomes…
A practical guide to browser error monitoring with window.onerror, covering the cross-origin blind spot, resource failures that never bubble, and error reports that die when the tab closes. Includes tests and Angular…
A restaurant owner's pricing page says $219 a month. Her invoice, three years later, says something else. Nobody multiplies the monthly fee by 36 in front of her, and the parts that scale with her own sales — the…
I work on OnePassApps, the team behind app.onepassapps.com. This post is about one page of our own site, and about the part of it that only exists once JavaScript has run. I measured it on 10 November 2026: first the…
Most React tutorials stop at the same place: useState, useEffect, props, maybe context. Then they stop. The real questions come after that. Why does my component re-render? What happens during the commit phase? How does…
Financial calculators are deceptively easy to demo. A form accepts a principal, a rate, and a number of periods; a plausible monthly payment appears. But a plausible number is not a guarantee of a correct amortization…
The log said the sync was scheduled. Two minutes later, nothing had run. No error, no rejected promise, no missed callback warning — just a line that promised future work and a database that never changed. Here is the…
Taking one screenshot of a web page is easy. Taking a few hundred that actually look right is not. When I tried it, most of the results had at least one of these problems: a cookie consent pop-up covering half the page…
A retirement projection can change even when you keep the starting balance, withdrawal amount, and return rate identical. I'll show how to audit the order of spending and investment growth, keep inflation adjustments…
What is EU 42 in US shoe sizes? Most converters give one number with total confidence. I went to the source and read the official size charts from 11 brands, and this is what they print for a men's EU 42: US men's size…
I'm a software engineer and Scrum Master, and I built Teamvane Planning Poker for Jira: the team estimates on the Jira issue itself, cards stay hidden until the reveal, and the agreed estimate saves to story points in…
A shop puts a QR code on the counter. A customer scans it. Nothing happens. Or something happens, but it's a Google Maps search box pre-filled with the text "123 Main St, Springfield" — and the customer has to tap…
useEffect is the most misused hook in React. Most of the time the bug isn't obvious: the component looks fine, until your API gets hammered or the wrong user's data shows up on screen. I took four common mistakes, ran…
Extract Text from Any Scanned Document for Free: Client-Side OCR with Tesseract.js & PDF.js Have you ever needed to copy text from an invoice, a photo of a book page, or a scanned contract, only to discover it’s saved…
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