microsoft/TypeScript: TypeScript 7.0.2
https://devblogs.microsoft.com/typescript/announcing-typescript-7-0/ This tag was originally released at: https://github.com/microsoft/typescript-go/releases/tag/typescript%2Fv7.0.2
Daily edition · JavaScript
The daily ledger
TILens turns technical updates into a focused daily brief: official releases, trusted reporting, and practitioner analysis, deduplicated and organized by topic.
reactjs/react.dev: Improve the browser-only rendering example (#8616)
Improve the browser-only rendering example (#8616) * Improve browser-only rendering example * Clarify browser-only example action * Show browser-only fallback on reload
Build an AI Agent with Node.js: Tool Calling with the OpenAI Responses API
A chatbot can answer questions. An AI agent can decide that it needs information or an action, call a tool, receive the result, and continue reasoning. That difference sounds small. Architecturally, it changes…
Why Uptime Monitoring Alone Isn't Enough
Many developers think a website is healthy as long as it's online. But a website can be "up" while still having serious problems: SSL certificates can expire Contact forms can stop working DNS records can break APIs can…
Stop Killing Your GPUs: The Ultimate Guide to BullMQ and Redis Queue Management for AI and Generative Workloads
If you are building generative media pipelines—spanning deep latent space diffusion models, real-time video tensor processing, or complex WebGPU shader execution graphs—you are playing with fire. Unlike traditional web…
I built DevTolkit: A privacy-first, 100% offline Swiss Army knife for developers
The Problem We've all been there. You're debugging an API response, need to format some JSON, or quickly convert a YAML config file. You open a random online tool, paste your data, and... boom. You just sent your…
Top Ten Places To Buy Verified Wise Account Online
Top Ten Places To Buy Verified Wise Accounts Online 💬 Need Assistance? We’re Here 24/7! 📧 Email: usamarketit@gmail.com 💎 WhatsApp: +1(772)563-8300 🚀 Telegram: @usamarketit 🎮 discord: usamarketit ✅ Trusted Service | ⚡…
No accounts meant no license server — so my $19 one-time SaaS signs its keys with ECDSA P-256
I made a product promise I didn't think through: no accounts, no subscription, $19 one-time. The product is Resbetter — paste your resume, get the interview questions it will trigger, with STAR answers already built.…
reactjs/react.dev: Pin matching React Canary versions in Sandpack demos (#8614)
Pin matching React Canary versions in Sandpack demos (#8614) * Pin matching React Canary versions in Sandpack demos * Use cached Canary build in Sandpack demos
Building File Utilities That Run 100% in the Browser
I recently built filetools, a suite of file utilities that run entirely in the browser. No server backend, no file uploads, no data collection. The Problem Existing tools for CSV extraction, PDF manipulation, and table…
Why Your Salesforce Code Breaks on Other Orgs
Two Orgs. Same Code. One Breaks. What the CSP wall taught me about front-end that actually travels. I stared at the console error for longer than I want to admit. The component worked. I had tested it on my dev org,…
Stop a Malicious postinstall Script Cold With One CircleCI Config Change
Every npm install you run in CI trusts every dependency, and every one of their dependencies, to execute arbitrary code on your build machine before your own code runs a single line. That's not a hypothetical — it's…
Minimal JS, modern CSS anchored product tours
Ever wondered how to build those interactive product tours that spotlight elements and walk users through your app? Ever wondered how you could with just roughly 100 lines of JS and modern CSS? Wonder now more, I will…
The Free Model Caught Every Exception. My Monitoring Caught Nothing.
Have you ever watched a monitoring dashboard go quiet and felt relief instead of dread? That was my first mistake, because the silence meant my payment webhook was failing on every request. The error handling I had just…
Render Infrastructure Incident? Multiple Backend Services Returning 502 and 503 Errors
TL;DR August 20, 2026 Today, I ran into a problem with multiple backend services hosted on Render. At first, I assumed one of my applications had failed. Then I checked another service. The same thing happened. I…
reactjs/react.dev: Fix stream demos on iOS Safari (#8613)
Fix stream demos on iOS Safari (#8613)
The "USB-C" for AI That's Fixing the M N Integration Problem
What is MCP, and where did it come from? In November 2024, Anthropic released the Model Context Protocol (MCP) — often described as the "USB-C for AI." It solves what's known as the M×N integration problem. Before MCP,…
oven-sh/bun: Bun v1.4
To install Bun v1.4 curl -fsSL https://bun.com/install | bash # or you can use npm # npm install -g bun Windows: powershell -c "irm bun.com/install.ps1|iex" To upgrade to Bun v1.4.0: bun upgrade Read the blog post:…
A Guardrail Can Hide a Tool Result Without Undoing the Action
OpenAI Agents JS 0.17.0 clarifies a subtle boundary around guardrails, tool-result replay, and retained copies. A guardrail may keep a tool result out of the model’s next replay, but that does not automatically reverse…
We caught a SQL injection with an offline AI security scanner — here's the exact query it found
The bug Here's a login endpoint from a small Express demo app (scan-target-demo-apps/apps/01-sql-injection): app.post('/login', (req, res) => { const { username = '', password = '' } = req.body; const query = `SELECT…
Autonomous AI Agent Orchestration: Scaling Multi-Agent Systems in Production
Transitioning generative models from isolated chat interfaces into production-grade multi-agent frameworks requires solving complex coordination challenges. As organizations scale autonomous workflows, naive prompt…
A Beginners Guide To Closures
Introduction If you've been writing JavaScript for some time now, you've probably used a closure without realizing it, maybe in a setTimeout, an event listener, or a function that returns another function. Closures are…
The Dependency Graph Is the Type: Meet InferDI
Most TypeScript dependency injection containers type services. InferDI goes further: it types the dependency graph itself. As you register services, the container's type evolves with the graph. TypeScript knows which…
Who Can Join a MERN Full Stack Course?
Who Can Join a MERN Full Stack Course? A MERN Full Stack Course is suitable for anyone who wants to build a career in modern web development. The course can be particularly useful for students, fresh graduates,…
Your generated file is the claim. Test it like one: reading a theorem back out of a WAV
Last night I generated a three minute film whose soundtrack is supposed to be a mathematical object. Not music inspired by it. The object itself, performed. The object is a rhythmic tiling canon: a set of onsets A, a…
Computing WHO growth percentiles on-device
Every baby tracker shows growth percentiles. "Your daughter is in the 72nd percentile for weight." It looks like a lookup — find the row for her age, compare, print a number. It isn't. And the ways it goes wrong are…
How a Simple Calculator for My Father Turned Into a Growing Web Platform
A few months ago, I built a small tool for one person: my father. He likes playing Lotofácil, a popular Brazilian lottery, and used to spend a lot of time doing combinations and calculations manually on paper. One day I…
Random pairing gets surprisingly tricky once you try to avoid repeats
I thought a "random pairing" tool would be a half-hour job. Shuffle a list, take names two at a time, done. The annoying part only showed up when I tried to make it usable for recurring things like coffee chats, book…
A missing exchange rate is not an exchange rate of 1
This is a submission for DEV's Summer Bug Smash: Smash Stories powered by Sentry. var fx = (rates.rates && rates.rates[v.currency]) || 1; That line converts a crypto price into whatever currency the visitor picked. It…
I asked a mapping API for lakes named Huron. It sent me Lake Baikal.
I was testing a geospatial library against a public demo server and sent it a filter: GET /collections/lakes/items?filter=name LIKE '%Huron%'&filter-lang=cql2-text It replied 200 OK. It reported 25 matches. Here is what…
How to Convert PDF to Word in the Browser with Vue 3 and pdf-lib
Converting PDF to Word seems straightforward, but the reality is more complex. PDF stores text as character coordinates, while Word uses structured paragraphs. Bridging this gap requires careful text extraction and…
Autism Treatment, Speech Therapy, Hearing Aid Centre for Kids & Children in Ludhiana Punjab
I Built DEVRIAN: Privacy-First Developer Tools That Run in Your Browser
How many times have you opened a random website just to format JSON, decode a JWT, generate a UUID, test a regex, or calculate a hash? I’ve done it more times than I’d like to admit. The annoying part isn't the task…
I got tired of writing boilerplate imports, so I built Block: Run Python, JS, and Lua in a single file
💡 The Problem: The Import / Glue Code Headache A while ago, I was practicing importing modules across different projects. I wanted to use Python for its rich data science libraries and Node.js for its async web…
Salary Attendance Calculator – A Simple Tool for Employee Pay Estimation
Tracking employee attendance and calculating monthly salaries can become repetitive for businesses. A salary-attendance calculator provides a convenient way to estimate employee pay using salary and attendance…
Convertendo Tabelas Web em Instruções SQL INSERT
Você tem uma tabela em uma página web. Precisa dela no seu banco de dados. A abordagem manual: copiar para o Excel, limpar, exportar CSV, escrever CREATE TABLE à mão, usar LOAD DATA ou COPY, debugar os erros. A…
Purpose of the useReducer hook in React
The useReducer hook is a state management hook in React that provides an alternative to the useState hook. It is used when the state of a component is complex and requires more than one state variable. Syntax: const…
What three JavaScript JSON parsers really return when an LLM's output is broken
Three JavaScript parsers, one pile of broken model output, twelve labelled cases. One run each, nothing tuned afterwards. Here is what each one actually returned — including the case where the best scorer confidently…
Give Claude Code your JetBrains IDE tools for free
Using Claude Code on a large codebase while keeping a JetBrains IDE open beside it? Give the agent access to what the IDE already knows. Explyt MCP connects Claude Code, Codex, Cursor, OpenCode, and other MCP clients to…
The Design Workflow That Makes an Expo Template Stop Looking Like an Expo Template
TL;DR Six defaults give away almost every Expo template: blue-500, Inter, Lucide outline icons, borderRadius: 12 cards, borderRadius: 8 buttons, and a "Nothing here yet" empty state. Three changes do most of the work in…
WHY YOUR REACT APP RE-RENDERS TOO MUCH (AND WHAT ACTUALLY FIXES IT)
A React page feels slow, so someone opens the code and starts adding memo, useMemo, and useCallback everywhere. Usually that makes the code harder to read before it makes the page faster. React rendering a component…
Fix Next.js "params should be awaited" Error in Next.js 15+
Fix Next.js "params should be awaited" Error in Next.js 15+ If you are seeing the params should be awaited Next.js error after upgrading to Next.js 15 or following an older App Router tutorial, you are not alone. The…
I Stopped Asking Cursor to “Fix My Code” Here’s What I Do Instead
Cursor is one of the most powerful AI coding editors available today. But if you've used it on a real React codebase, you've probably hit this frustrating pattern: you ask for a small change, and Cursor rewrites half…
I Built ChessIQ to Train Positional Chess Evaluation, Not Just Tactics
If you've played competitive chess, you've probably hit this moment: Neither side has a tactic. Nothing is hanging. No forced combination to calculate. But a strong player glances at the board for three seconds and…
Best Web Development Course in Laxminagar: Build the Skills to Create Modern Websites
Best Web Development Course in Laxminagar: Build the Skills to Create Modern Websites In today's world every business needs a strong online presence. From startups and local shops to companies, websites play an…
Modern Concurrency: From Execution Models to Production Reliability
Concurrency programming can be reduced to three questions: How do we divide work? How do tasks coordinate? How do we protect shared state? Languages and runtimes provide threads, coroutines, event loops, actors, and…
How I Built a Context-Dependent Core Belief Detector in 110 Lines of Vanilla JavaScript - No AI, No NLP, No Attention Mechanism
The same words mean different things in different contexts. "I'm not good enough" at work means I'm incompetent. "I'm not good enough" in a relationship means I'm unlovable. "I'm not good enough" with family means I'm a…
Prevent Optimizely from being blocked by ad-blockers using AWS
Category: Privacy Some ad-blockers might block Optimizely from running. In this tutorial, we’ll see how we can prevent this from happening. Ad-blockers will often look at the domain the request is originating from and…
We Can't See What You Paste — And That Was a Design Constraint, Not a Slogan
We can't see what you paste. No logging. No uploading. Just your browser. That's not marketing copy I wrote after the fact — it's a description of how FormatStack is actually built. Every tool (JSON formatter, regex…
The x402 ecosystem quietly split — and your endpoint may be unpayable
We run 19 paid x402 services — 800+ endpoints selling data to AI agents for USDC micropayments. Last week we tried to pay one of our own endpoints with the most-installed x402 npm client. It couldn't. No error. No…
The End of useMemo: React Compiler in Next.js
The Exhausting Re-Render Crisis For the past decade, building highly interactive React applications has been a delicate balancing act. React’s core architecture dictates that when a component's state or props change,…
Why input.value = 'x' doesn't fill a React form (and what actually works)
If you have ever tried to script a React form — a test helper, a browser extension, a bookmarklet, an onboarding demo — you have probably hit this: document.querySelector('#email').value = 'test@example.com'; The field…
I built 59 free browser-based dev tools in vanilla JS — here's what I learned
I've been quietly building Antigravity Tools — a collection of 59 free, browser-based developer utilities — and today I'm sharing everything I built and learned. Why vanilla JS? No React, no build step. The main…
DeepSeek is back... and Silicon Valley is terrified
Take BlueDot's Future of AI course for free - https://bluedot.org/fireship OpenAI just paused its biggest training run in history just as things were getting interesting. Let's dive in. #coding #programming Want more…
10 Best Platforms for Buying OnlyFans Accounts In 2026
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Logging Done Right: A Practical Guide
Logging Done Right: A Practical Guide Logging is one of those things we all do, but rarely do well. I've spent years sifting through tangled log files, and I've learned that a little discipline goes a long way. Here's…