The world wide web basically runs on JavaScript, HTML, and CSS. Unfortunately, JavaScript lacks several features that would help developers use it for large-scale applications. Enter TypeScript .

Let’s start at the beginning. JavaScript has been the core technology for web applications since the 90s. It’s used to create interactive web pages in combination with HTML and CSS.

CSS: Enter CSS to be applied to the HTML used in your tests. It is placed between <style> elements in the header portion of the page. HTML: This area allows you to enter HTML to be used in your tests.