34% coffee liqueur, one shot espresso… nope, just kidding. JavaScript is a scripting language that allows web designers to create interactive websites. JavaScript, which extends a browser’s default controls and behaviours, is responsible for the majority of dynamic activity on a web page.

Pop-ups, slide-in calls-to-action, security password creation, check forms, interactive games, and special effects are all examples of JavaScript applications. It’s also used to create server-based applications and mobile apps.

JavaScript is particularly important in responsive web design, which employs the same code for desktop and mobile devices to provide a consistent user experience.