Typescript is a superset of JavaScript. As its name suggests, TypeScript adds optional static typing to the JavaScript language. JavaScript is a scripting language that allows developers to create dynamic web content. It is known for being fairly easy to use and learn. This makes it a popular programming language for small and medium-scale web projects. Developers use TypeScript when they need to scale up their JavaScript development. Its language is more powerful and intuitive, allowing developers to find and correct errors during compile time, rather than only during run-time, as with JavaScript. TypeScript is better suited than JavaScript for large applications, but it requires a foundational knowledge of JavaScript to use.