Nowadays JavaScript has three different keywords to declare a variable — var, let and, const. Each has its own properties and particularities. Let’s start by making a simple comparison ...

30 November, 2011. It was a Wednesday. I hear a lot of talk about how it’s a performance penalty to use globally scoped variables in JavaScript (not to mention, dangerous / dumb). When a function ...

excerpt: JavaScript developers often get confused by JavaScript's variables and scope. Here's a quick guide to understanding these concepts. dateModified: 2021-06-12T19:30:41+03:00 I have seen many ...

I have seen many developers - my younger self included - struggle with JavaScript's variables and scopes, even if they have some experience with coding and/or the language itself. While there are ...