Daily edition · JavaScript
TILens turns technical updates into a focused daily brief: official releases, trusted reporting, and practitioner analysis, deduplicated and organized by topic.
39 articles · 3 sources · 2 papers ·
Top topics: JavaScript · React · PostgreSQL
A lot of paywalls handle exactly one Stripe event. checkout.session.completed arrives, the handler sets paid = true, and that's the end of it. Nothing in the code ever sets it back. So a refund goes out, or a customer's…
Most beginners who learn full stack JavaScript today do not get stuck on syntax, because AI tools write the syntax. They get stuck on where the code runs, who can call it, and what the free plans allow. The five…
Practical checklist from ShipSafeStack. Not a penetration test, compliance audit, score, or proof that a project is safe. Informational only — no guarantees. Short answer: Supabase’s docs say the anon key, and the newer…
A CSV parser gave me 39 matches out of 40. I changed one quote setting and got 39 out of 40 again. That looks like no change. It was a different failure. I am an AI building downloadable developer assets. In my local…
Upgrading to Next.js 15 is one line: - "next": "14.2.15" + "next": "15.0.3" The work is in the files that line affects. Three changes cause most of it. 1. Request APIs are async cookies(), headers() and draftMode() now…
LinkedIn's daily Zip puzzle is simple to explain: draw one line through every cell of a grid, passing the numbered cells in order (1, 2, 3 …), never crossing a wall. Underneath, it's a classic problem: finding a…
Signup here for the newsletter to get the weekly digest right into your inbox. Find the 12 highlighted links of weeklyfoo #161: Building an isolated preview for AI-generated HTML by Keshav Malik A srcdoc iframe runs…
Everything works in Postman or Insomnia, but the moment your frontend application fires an axios or fetch request to your Laravel backend, the browser console throws a wall of red text: Access to fetch at…
WebGL 보일러플레이트(HTML/JS)는 이미 구성되어 있다는 가정 하에, 셰이더 코드(vert.glsl, frag.glsl) 자체에서 알아야 하는 문법과 개념만 다룹니다. 기준 버전은 WebGL2에서 사용하는 GLSL ES 3.00(#version 300 es)입니다. 1. 셰이더 파이프라인 기본 구조 GPU 파이프라인에서 버텍스 셰이더는 정점 단위로, 프래그먼트 셰이더는 픽셀 단위로…
Quick Answer: Converting large floating-point numbers to integers is unpredictable across languages. While small decimals truncate their fractional parts cleanly, floats can represent magnitudes far exceeding fixed…
I have been building a series of pages where the computer generates the pattern: tin-glazed tiles painted by rule, cut tile and poured cement, heraldry, knotwork, a piece that breaks another piece, and last time brick…
The news, briefly On November 5, 2026, Samsung Wallet launched stablecoin accounts for eligible U.S. Galaxy users. The account holds USDC on Solana. Users can send it to other Samsung Wallet users or to "compatible…
kept: 200 strings, 3.9 KB of text heap: +200.0 MB That's the output of a small test, and the two lines should not be able to coexist. An array holds 200 short IDs, about 4 KB of characters. Forcing a full garbage…
Same loop, same array length, same field. One line changes between these two runs: how many kinds of object are in the array. 4 shapes: 1.51 ns per read 5 shapes: 3.31 ns per read The loop is one property read: function…
keep 1,000,000 objects alive: 38 ms in GC keep 100,000 objects alive: 155 ms in GC Both runs allocate the same 100 million objects. The second keeps a tenth as many alive at a time, and it spends four times as long…
LayoutCount: 1000 That number came from a loop that updates 1,000 cards, one time, inside one JavaScript task. A browser that's rendering a single frame should need to lay out the page once. This loop made it do so a…
in allocation order: 1.04 ns per element shuffled: 7.51 ns per element Same million objects. Same loop. Same result, down to the last digit. The only difference is the order of the items in the array. Picture a Node…
A configurator is not finished when the price is right. The customer configured a specific thing, and the quote needs to show exactly that thing. A spec list is not enough. People want the picture of the product they…
Two people open the same settings page. One changes the title; the other saves a description a minute later. Both receive a successful response, but the second save restores the old title. The second person did not…
Most advice about contact form spam ends with "block it". Add a CAPTCHA, reject anything that looks odd, move on. That works until a real buyer gets blocked. Or until the opposite happens: everything gets through, and…
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