Javascript

JavaScript is the programming language of the web, running in every browser and on servers through runtimes such as Node.js. It is dynamically typed and single-threaded, using an event loop with callback and microtask queues to handle asynchronous work through callbacks, promises and async/await. Its quirks around scope, this, type coercion and closures trip up many developers, and understanding them makes every framework built on it easier to use.

13 articles

05/02/2025 2 min read

Instantly Edit Websites with Chrome designMode

Use Chrome document.designMode for temporary copy and layout mockups. Steps, limits, a11y warnings, and when to use DevTools overrides instead.
22/07/2024 7 min read

JavaScript in AI Development: Browser and Node Tutorials

Practical JavaScript AI tutorial: local embeddings in Node, browser image classification with Transformers.js, ONNX/WebGPU notes, and a ship…
10/10/2023 3 min read

Event Bubbling in JavaScript

Executive Summary: Nested DOM events fire on the target then climb parent nodes, which surprises teams who attach…
22/07/2023 3 min read

Concurrency & Parallelism in JavaScript

Executive Summary: JavaScript is single-threaded, so concurrency and parallelism get mixed up and UI freezes follow. I separate…
22/09/2022 4 min read

Mastering Asynchronous JavaScript & Event Loop

Executive Summary: Blocking the main thread on fetches and timers makes UIs feel stuck and unresponsive. I cover…
03/07/2022 3 min read

Inheritance And Prototype Chain in JavaScript

Introduction JavaScript has positioned itself as an integral part of web development, fueling both client-side and server-side operations.…
20/05/2022 2 min read

Find Images Missing Width Height Using JS in Chrome Console

Website optimization is critical in delivering a seamless user experience, especially as page load times and stability become…
26/04/2021 4 min read

Event Loop & Callback Queue

How the JavaScript event loop and callback queue work, and how to structure your code so the main…
29/01/2020 2 min read

Javascript: The Weird Parts

JavaScript runs nearly everywhere, but like any language it has quirks and weird parts that can cause confusion…
30/07/2019 1 min read

Get last element of Array in Javascript

You can always do it in the fastest way. If performance is a deal breaker for you where…
06/05/2016 5 min read

Get values from PHP to Javascript

When developing web applications, there are often times when you need to pass data from the server-side (PHP)…
23/12/2013 3 min read

Vanilla JavaScript Equivalent jQuery Tasks Replaced for Performance

Let’s be honest: jQuery has been a lifesaver. For years, it smoothed over the rough edges of cross-browser…
11/10/2013 3 min read

Structuring Your JavaScript Applications

As web applications become more complex, the way we structure our JavaScript code matters more than ever. If…