While you can pick up the very basics of JavaScript in a day, becoming truly good at it takes much longer. Think of it like ...

The expected behavior in both the Node.js REPL and the browser console should be consistent with JavaScript's rules for variable declarations and assignments. What do you see instead?

JavaScript variables hold a wide variety of information and can be used with virtually any data type. Here's how to use variables to store numbers, text strings, objects, and more.

It's been a while since I worked on regexs in JavaScript, but generally the way you do this in most programming languages is to build the regex as a string and then pass it into the regex engine.

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 table ...

JavaScript Typing Unlike strongly typed programming languages such as C#, JavaScript is loosely typed and allows you to assign any data type to a variable without giving the variable a specific type.