21 articles

#javascript

All articles tagged with #javascript.

The keyv npm Attack: Signed, Verified, and Malicious

The keyv and cacheable npm packages shipped a credential stealer with valid provenance. What it did, how to check if you're hit, and what to fix first.

Aug 7, 20269 min

Web Dev

Why TypeScript? Catch Bugs Before You Run

What TypeScript is, the bugs it catches before runtime, and why it took over, with live, type-checked examples from the very start.

Jul 14, 20267 min

Web Dev

Why React? Components and the UI Mental Model

What React is, the component mental model, and why it took over UI development, with a live React component you edit in the first minute.

Jul 7, 20268 min

Web Dev

JavaScript async/await and the fetch API

Write clean asynchronous JavaScript with async/await and fetch real data from an API, with live, runnable examples.

Jun 30, 20267 min

Web Dev

JavaScript Project: Build an Interactive Quiz App

Put it all together: build a small interactive quiz app in vanilla JavaScript, using DOM, events, and state, runnable in your browser.

Jun 30, 202610 min

Web Dev

JavaScript Callbacks and Promises, Explained

Understand asynchronous JavaScript: callbacks, the problem they cause, and how Promises fix it, with live, runnable examples to try.

Jun 29, 20268 min

Web Dev

JavaScript Events: Clicks, Input and Listeners

Respond to users with JavaScript events: addEventListener, the event object, clicks and input. Build interactivity, live in your browser.

Jun 29, 20268 min

Web Dev

JavaScript Objects: Properties, Methods and this

Model real things with JavaScript objects: properties, methods, dot vs bracket access, and a first look at this, with live code.

Jun 28, 20269 min

Web Dev

The JavaScript DOM: Select and Change the Page

Use JavaScript to read and change a web page: select elements, edit text and styles, and create nodes, all with a live preview.

Jun 28, 20268 min

Web Dev

JavaScript map, filter and reduce, Explained

Transform arrays the modern way with map, filter and reduce. Clear examples of each, runnable live in your browser.

Jun 27, 20269 min

Web Dev

JavaScript Arrays: Create, Access and Change Lists

Store lists in JavaScript arrays: indexing, adding and removing items, and the most useful array methods, runnable in your browser.

Jun 27, 20268 min

Web Dev

JavaScript Arrow Functions and Scope, Explained

Arrow functions vs regular functions, plus block scope and closures in plain English, with live, runnable JavaScript examples.

Jun 26, 20269 min

Web Dev

JavaScript Functions: Parameters and Return Values

Define and call JavaScript functions: parameters, return values, default parameters, and why functions are the heart of the language.

Jun 26, 20266 min

Web Dev

JavaScript Loops: for, while and for...of

Repeat work in JavaScript with for, while, for...of and for...in loops. When to use each, with live runnable examples.

Jun 25, 20268 min

Web Dev

JavaScript Operators and if/else Conditionals

Arithmetic, comparison and logical operators, plus if/else and the ternary. Make decisions in JavaScript, with live runnable code you can edit.

Jun 25, 20268 min

Web Dev

JavaScript Data Types: Numbers, Strings, Booleans

The core JavaScript data types (number, string, boolean, null, undefined) and how typeof works, explained with live runnable examples.

Jun 24, 20267 min

Web Dev

JavaScript Strings and Template Literals, Explained

Work with text in JavaScript: string methods, concatenation, and template literals for clean interpolation, with runnable examples throughout.

Jun 24, 20268 min

Web Dev

JavaScript Variables: let, const and var Explained

How to store data in JavaScript with let and const (and why to skip var), plus block scope basics, runnable live in your browser.

Jun 23, 20268 min

Web Dev

Why Learn JavaScript in 2026 (and Where It Runs)

What JavaScript is, where it runs (browser and server), and why it's the language of the web, with live code you run in the very first minute.

Jun 23, 20267 min

News

The JavaScript Backend Stack to Reach For in 2026

Express is fading for new projects while Bun, Hono, Fastify, and NestJS split the work. Here's what to actually pick in 2026, and when.

Jun 16, 20269 min

News

TypeScript Overtakes Python as GitHub's #1 Language

TypeScript just passed Python to become GitHub's most-used language. The real story isn't hype. It's why type safety quietly won in the AI era.

Jun 16, 20268 min