JavaScript Guides
JavaScript tips for real projects
Practical JavaScript guides for DOM tricks, strings, numbers, browser behavior, UI components, debugging, and frontend basics developers use every day.
What is JavaScript? The Honest Beginner's Guide to How It Actually Works
JavaScript runs on something like 98% of websites you visited today, and every modern browser ships with an engine built specifically to execute it. That is the short version. The longer version, and the one worth reading if you actually want to learn the language or decide whether to learn it, takes a few more paragraphs. So what is JavaScript, really? It is a scripting language that started life inside the browser in 1995, got a standards body wrapped around it, and now powers everything from Netflix's UI to PayPal's backend to the chat widget you ignored on a SaaS landing page this morning.
JavaScript Objects and Methods: A Beginner's Guide That Actually Sticks
An object in JavaScript is just a bag of named values. That is the entire idea. Once that clicks, JavaScript Objects & Methods stop feeling like a topic and start feeling like the default way you model anything real, whether that's a coffee machine, a user session, or a delivery van with a driver inside it.
How to Detect Word Wrap in a Textarea with JavaScript (No Libraries)
A textarea will not tell you when its text wraps. There is no wrap event, no callback, nothing. The browser draws the line break visually and moves on, and textarea.value stays exactly the same string you typed. If you need to know when content has flowed onto a new visual row, you have to measure it yourself, and the cleanest way to do that is with a hidden mirror element. This guide on how to detect word wrap in textarea JavaScript walks through the exact technique I use in production, with a working example you can paste in.