Whether you like it or not, if you are building applications for the Web, you will need to know JavaScript. Sorry, Flash and Silverlight! Unfortunately, JavaScript is not the most straightforward language to learn or understand, and the tooling for it is not good. This is where TypeScript comes in. TypeScript is a superset to JavaScript that tries to solve many of these problems and make the code more structured and less error-prone. And it also offers tooling support in a way that JavaScript just can’t.