📝 Latest Javascript Articles on Dev.to

I built a browser-based coding education platform as a CS student, here's how

A few months ago I got tired of coding platforms that either spoon-fed you theory or made you watch......

• ✍️ Author: Delfin Obiang
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: webdev, javascript, python, beginners

Why 1100 / 1.1 = 999.9999… Is a Tax Calculator Bug, and Two Ways to Fix It

Why 1100 / 1.1 = 999.9999… Is a Tax Calculator Bug, and Two Ways to Fix It Japan has a......

• ✍️ Author: SEN LLC
• 👍 Reactions: 0 | 💬 Comments: 1
• 📅 Published on: 4/12/2026
• 🏷 Tags: javascript, webdev, math, tutorial

"My AI Coding Tools Were Running Up a Tab I Couldn't See — So I Fixed That"

I had no idea which model was being called, by which tool, or how much it cost — until I added per-model cost tracking to my local AI proxy....

• ✍️ Author: YiYaoAI
• 👍 Reactions: 6 | 💬 Comments: 2
• 📅 Published on: 4/13/2026
• 🏷 Tags: webdev, javascript, ai, opensource

You Don’t Always Need React — Sometimes You Just Need Structure

A look at monsterjs, a JavaScript library that brings structure to complex UIs using Web Components, without the overhead of a full frontend framework....

• ✍️ Author: Volker Schukai
• 👍 Reactions: 0 | 💬 Comments: 2
• 📅 Published on: 4/13/2026
• 🏷 Tags: javascript, webdev, opensource, webcomponents

BDO Scraper: Rejestr Odpadów (674 000+)

BDO rejestr odpadów scraper - przeszukaj 674 000+ podmiotów w bazie gospodarki odpadami. Weryfikacja pozwoleń i compliance środowiskowy przez API....

• ✍️ Author: Peter
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/14/2026
• 🏷 Tags: webscraping, javascript, tutorial, api

ubigeo-fns: Librería TypeScript para UBIGEO del Perú

🚀 Introducción ubigeo-fns es una librería en TypeScript para trabajar de forma sencilla y......

• ✍️ Author: Franco Caballero
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/14/2026
• 🏷 Tags: typescript, node, javascript, opensource

I Built an API That Gives AI Agents Persistent Memory - Here's How

Every AI agent I've worked with has the same problem: it forgets everything. You give it a 20-minute......

• ✍️ Author: Tim Bassler
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/14/2026
• 🏷 Tags: ai, webdev, javascript, python

Shadow DOM CSS Isolation: How to Embed a Widget Without Breaking the Host Page

Shadow DOM is the only reliable way to prevent a third-party widget's CSS from colliding with a host......

• ✍️ Author: Benji Darby
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: javascript, webdev, preact, tutorial

How I Built a 2,600-Page Unit Converter with Programmatic SEO

I recently launched Qvert — a free unit conversion website with 2,600+ pages, each targeting a......

• ✍️ Author: Juan José Peña Delgado
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/14/2026
• 🏷 Tags: webdev, seo, productivity, javascript

Contador de tiempo de sesion en Flask + Javascript

Cuando se trabaja en sistemas con acceso de usuarios, cada lenguaje y/o framework asociado, tiene sus......

• ✍️ Author: Hermann Pollack (hpollack95)
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/14/2026
• 🏷 Tags: development, python, javascript, flask

"5 AI APIs Every Frontend Dev Should Know in 2026"

"In 2026, knowing React is the baseline. Knowing which AI APIs to use — and how to use them — is......

• ✍️ Author: Devraj Singh
• 👍 Reactions: 7 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: webdev, javascript, beginners, programming

Towards an Open Source Print-Ready Publication Library in JavaScript

Towards an Open Source Print-Ready Publication Library in JavaScript Building paragraf: a......

• ✍️ Author: Kemal Deniz Teket
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: javascript, typescript, opensource, node

Why JS/TS Is Not a Functional Language (And Why It Matters)

This post grew out of two years of interviewing JS/TS engineers. I'm genuinely interested in......

• ✍️ Author: Ivan
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: javascript, haskell, scala, functional

axios npm Supply Chain Attack (March 31, 2026) — What Happened and How to Check Your Lock File Right Now

On March 31, 2026, malicious versions of axios — a package with 70M+ weekly downloads — were......

• ✍️ Author: LazyDev_OH
• 👍 Reactions: 1 | 💬 Comments: 0
• 📅 Published on: 4/14/2026
• 🏷 Tags: security, npm, javascript, webdev

🗺️ Fixing Ola Web’s Cramped Map — and Why Small UX Gaps Ship to Production

So, I was using the Ola web app recently and ran into something just… odd. The map — arguably the......

• ✍️ Author: CinfiniteDev
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: webdev, ux, javascript, softwareengineering

"How I Route claude-sonnet-4-6 to GPT-5 Codex — Without Claude Code Knowing the Difference"

The model name your AI coding tool sends is just a string. A proxy layer can remap it to any provider, any model — and the tool never notices....

• ✍️ Author: YiYaoAI
• 👍 Reactions: 5 | 💬 Comments: 1
• 📅 Published on: 4/14/2026
• 🏷 Tags: webdev, ai, javascript, opensource

I Built a JSON Fixer Because I Was Tired of Counting Characters

Trailing commas, single quotes, comments in JSON. The same errors over and over. So I built a tool that fixes them automatically, plus a jq playground that runs in the browser....

• ✍️ Author: Emiliano Saurin
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: json, jq, javascript, webdev

CSS Gradient Builder: Fixing Annoyances of Existing Tools

I built GradientForge because every CSS gradient generator was either ad-riddled or missing conic gradient support. Here's how and why....

• ✍️ Author: Max
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: css, webdev, devtools, javascript

Stop sending private PDFs to servers: Building a 100% Client-Side PDF Suite

The Problem: The "Black Box" of Online Tools Have you ever wondered what happens to your ID, tax......

• ✍️ Author: Zengkkj
• 👍 Reactions: 1 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: javascript, webdev, nextjs, privacy

What Happens When You Try to Build a Platform for 50+ Countries by Yourself

About a year ago, I decided to build an international real estate platform. Not for one country — for......

• ✍️ Author: DEMIR KIYANUS
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: webdev, javascript

Resend vs SendGrid (2026) — SendGrid Killed Its Free Tier, Now What?

SendGrid removed its free plan in May 2025. If your comparison article still mentions a free tier,......

• ✍️ Author: Thiago Alvarez
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: email, webdev, javascript, api

Clerk vs Better Auth (2026) — We Verified Every Price So You Don't Have To

Every auth comparison you've read is already wrong. Clerk changed pricing. Better Auth added......

• ✍️ Author: Thiago Alvarez
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: auth, webdev, nextjs, javascript

From 8 Seconds per Frame to Real-Time 3D Fractals in the Browser

A 20-year journey through code, curiosity, and better tools About 20 years ago, I wrote my......

• ✍️ Author: Shinigami
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: webgpu, gamedev, ai, javascript

Frontend Framework Bundle Size Benchmark: React/Vue/Angular vs Fine-Grained Runtimes

A cross-framework TodoMVC benchmark comparing raw, minified, and min+gzip bundle size growth as component count increases....

• ✍️ Author: qingkuai
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: javascript, webdev, performance, frontend

Methodology

Alt text is no longer optional. It is a ranking factor, an accessibility requirement, and......

• ✍️ Author: Luca Sammarco
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: webdev, images, tools, javascript

I picked a 5ms keyword router over an LLM meta-router for my AI app. Here's the math.

I picked a 5ms keyword router over an LLM meta-router for my AI app. Here's the......

• ✍️ Author: Samarth Bhamare
• 👍 Reactions: 0 | 💬 Comments: 3
• 📅 Published on: 4/11/2026
• 🏷 Tags: ai, electron, javascript, showdev

I build free browser tools with Next.js — no backend, no uploads, everything runs client-side

I've been building supereasy.tools — a collection of small, fast, privacy-friendly browser utilities.......

• ✍️ Author: Sreten Madzgalj
• 👍 Reactions: 1 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: webdev, javascript, nextjs

I Built a 278,000-Page Website From Federal Data for $5/Month

The US government collects insane amounts of data about every ZIP code. Water violations, lead......

• ✍️ Author: artakulov
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: showdev, webdev, javascript, data

The JS Event Loop Has a Model Gap, Here's What Most Tutorials Don't Show You

The standard explanation of the JavaScript Event Loop goes like this: there's a call stack, there's a......

• ✍️ Author: Deveshwar Jaiswal
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/13/2026
• 🏷 Tags: javascript, webdev, performance, tutorial

Valid Parantheses

I recently was looking at this question and I don't know about all but I definitely was not aware of......

• ✍️ Author: Kaushal
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 4/14/2026
• 🏷 Tags: javascript, dsa, webdev, programming