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5 Important Points about Objects in JavaScript

Objects are collections of key-value pairsAn object stores data as properties, where each property has a key (string or Symbol) and a corresponding value (any data type, including other objects or functions).Objects can be created in multiple waysThe most common ways are:Object literal: const person = { name: "John", age: 30 };Constructor: const person = new Object();Object.create() methodProperties can be accessed using two notations Dot notation: person.nameBracket notation: person["name"] (u

Create Multilingual Voice Content with ElevenLabs

Why Multilingual Voice Matters in 2024If you’ve ever built an app that reaches users beyond your native tongue, you know the pain of juggling separate audio pipelines for each language. Subtitles are a quick fix, but they don’t capture the warmth of a human voice, and they’re inaccessible for people with visual impairments. Enter multilingual text‑to‑speech (TTS). Modern TTS can generate natural‑sounding speech in dozens of languages, letting you:Deliver onboarding tutorials in the user’s

A New Chapter in My Developer Journey 💻✨

Hello DEV Community 👋🏽💻I’m a Software Engineering graduate and a developer currently growing my skills in web development.I’ve been working with technologies like JavaScript, React, HTML, CSS, Python and SQL, and I’m excited to keep learning, building projects and connecting with other developers here.I’m looking forward to sharing my learning journey, projects, challenges and things I discover along the way.Glad to be here! 🚀 DEVCommunity #SoftwareEngineering #WebDevelopment #JavaScript #R

Why we don’t claim auto-highlights

Auto-highlights sound like a shortcut. Sometimes they are. But selecting a clip is not the same as understanding why a moment matters.A useful short often depends on context: the sentence before the punchline, the product detail that proves the claim, the reaction shot that makes the story land, or the pause that should be removed. A model can suggest candidates, but a creator still needs to decide what the cut is trying to say.That is why ReelWorkshop is deliberately an assembly tool for existi

Read the game client, not the wiki

This one covers five days, September 25 to 29. Most of it went into rules for the tools I build with: a CLI that reports before it acts, and a workflow kit that split every file over 500 lines. The rest went into a new side project that started on Sunday, a game database that reads its data straight out of the game. Lootlore: a game database built from the client's own filesLootlore is a new site for players: items, monsters, NPCs, quests, maps, skills, shops, crafting, and music, plus a ch

Angular Performance Optimization in 2026 — OnPush, trackBy, Lazy Loading, Signals, Standalone (Real Code, Production Metrics)

Angular apps don't go slow because Angular is slow. They go slow because the defaults — Default change detection, NgModules with eager imports, no trackBy, BehaviorSubject everywhere, no lazy loading — were designed for a world where bundle size and per-keystroke render cost weren't the user-facing scoreboard. In 2026 they are: Core Web Vitals (LCP, INP) are part of the Google ranking signal and the conversion funnel.This is the production playbook for Angular 19+. Five techniques compose into t

My CSV sort was 30x slower in Electron than in Node — and it was string hashing

I was building a desktop viewer for JSON, CSV and Markdown files, and I wanted it to handle a genuinely large CSV: a million rows, 55 MB, the kind of export an eval run spits out.Loading was fine. Scrolling was fine. Then I clicked a column header to sort by a text column, and the window froze for over a minute.The strange part: I had already tested that exact sorting code in a Node script against the same file, and it took about half a second.Same code. Same data. Same machine. 140x apart.

Java vs. JavaScript: What Every CS Student Should Know

Java vs. JavaScript: What Every CS Student Should KnowIf you are a Computer Science student, you have probably heard about Java and JavaScript.Their names look similar, but they are actually two different programming languages with different purposes.In this post, let's understand the difference between Java and JavaScript in a simple way. What is Java?Java is a general-purpose, object-oriented programming language.Java is commonly used for:Backend developmentAndroid developmentEnterprise applic

CapCut vs Opus Clip: choose by job, not by hype

If you already have a folder of clips, the CapCut-versus-Opus Clip question is often framed backwards.CapCut and Opus Clip are useful, but they solve different problems:CapCut is a broad editor. It is a good fit when you want effects, captions, templates, audio work, and hands-on control.Opus Clip is aimed at finding short moments inside longer footage. It is a good fit when the hard part is discovering candidate clips.A third job is easy to miss: you already picked the moments and just need to

A 9:16 crop workflow that keeps browser reel assembly honest

It does not generate a video from a prompt, auto-pick highlights, add captions or music, or promise reach.Editing and preview are free. Finished MP4 export is on the Starter plan at $19.99/month. That boundary is intentional: use the free tools to validate the framing and sequence before deciding whether the export workflow fits.The general lesson: make the crop decision visible, keep the subject in the safe area, and let the editor handle the mechanical assembly—not the creative judgment.

Facebook as a headless CMS: building a Sri Lankan F1 fan site on Next.js 16

F1 Paddock SL is a Formula 1 fan site I build for Sri Lankan supporters: race analysis, driver stories in Sinhala and English, live standings and telemetry, and paddock news pulled from our Facebook Page. It's live at f1paddocksl.com.It's a fan project, not a startup. Nobody is paying for F1 data, and I don't have a newsroom. That constraint shaped every decision in the stack — and one of them turned out to be the most interesting thing in the codebase: Facebook is the CMS.This is the six things

useState and useEffect in React

useStateuseState is a React Hook used to create and manage state in a functional component.State is a value that can change during the execution of a component. When the state changes, React re-renders the component and updates the UI. Syntaxconst [state, setState] = useState(initialValue);Here:state → stores the current valuesetState → updates the valueinitialValue → initial value of the state What does useState return?useState() returns an array containing two values:[ curre

Streaming YouTube into a Discord voice channel: the four bugs that nearly killed it

Shen is a self-hosted music bot I run for my own server. You search a song on the web app, hit play, and it either streams in your browser or lands in a Discord voice channel — same track, same queue, one process.Live at shen.zagan.space. Source is private for now.This isn't a tutorial. It's the four problems that took real time, and the fixes. The shape of itOne Node process, one repo, two deployment targets:server.js Express: REST API + Server-Sent Events + serves the built site + bo

Why I built a fully MIT, Notion-style block editor for React

TL;DR — slash-editor is a Notion-style blockeditor for React. Headless core on Tiptap v3/ProseMirror, React hooks, and UI delivered as areal shadcn registry, so the menus, toolbars and node views land in your repo as code you own.MIT end to end, no paid tier, no hosted dependency.Playground: https://slasheditor.dev/playgroundDocs: https://slasheditor.dev/docsStarter: https://github.com/buiducnhat/slash-editor/tree/main/examples/nextjs-starter The gapEvery time I needed a "Notion-like" edito

SDF vs. MSDF vs. Slug: GPU Text Rendering

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Using TypeScript with React: A Beginner's Guide

If you are learning React and have started hearing about TypeScript everywhere, you may be wondering:Why should I use TypeScript with React?I recently started learning React with TypeScript, and one of the first things I noticed is that TypeScript helps make React code more predictable and easier to understand.In this article, I'll explain some of the basic concepts I have learned so far.What is TypeScript?TypeScript is a programming language built on top of JavaScript.It adds static typing to J

Fix: import.meta.env Undefined on Production Build (Vite)

TL;DRimport.meta.env.VITE_SOMETHING returning undefined after vite buildalmost always means the variable in your .env file isn't prefixed withVITE_. Vite only exposes prefixed variables to client code by design — it'snot a bug, and it's the same behaviour in dev, it just tends to go unnoticedthere because of how the value is read. The errorA React app built with Vite reads its API URL from an environment variablethat works during vite dev but comes back empty once deployed:```javascri

Under Autumn’s Spell (October 2026 Wallpapers Edition)

Misty mornings, leaves shining in bright red, yellow, and orange hues, and spooky creatures making an appearance — October has a very special charm. So, how about some new desktop wallpapers to celebrate October’s beauty, and the upcoming Halloween season, of course? Well, we’ve got you covered.Just like it has been a monthly tradition here at Smashing Magazine for more than 15 years already, the wallpapers in this post were created by artists and designers from across the globe. All of them com

Understanding React’s useTransition: Mechanisms and Performance Implications

Ever had a React app where an update causes a janky UI or a spinner that pops up out of nowhere , but only sometimes? I ran into this recently when trying to make a search input feel smooth while fetching results. I used useTransition to defer the heavy update, but I didn’t fully grasp what React was doing behind the scenes. Turns out, useTransition is not just a fancy hook to slap on some state. It’s a clever way React’s concurrent rendering lets you mark updates as "non-urgent." That impacts

Generating 1.5 Million Unique QR Codes for Print, With Zero Duplicates: The Two Scripts I Open-Sourced

I run the backend for a consumer promotion platform — think "scan the code inside the pack, win a prize." It's been live for over two years across three countries, and as of writing has issued 1,498,385 unique codes and processed 107,218 registrations from entrants in 233 countries.Every single one of those codes has to be unique, forever, across every print run, in every market — because a code that's already been issued, printed on packaging, and sent to a warehouse cannot be reprinted, reassi