TypeScript has emerged as a powerful environment for authoring web applications. We'll explore using TypeScript with Node.js, MySQL, and TypeORM.

Because it's simple and scalable, organizations are using Node.js to not only build applications, but to do cloud-based application development and build IaaS and SaaS solutions.

Node.js applications are written using JavaScript and can be executed on a wide variety of platforms that include: OS X, Microsoft Windows, Linux, FreeBSD, NonStop and IBM i.

Developed by Node.js creator Ryan Dahl (notice Deno is an anagram of Node), Deno is an attempt to reimagine Node to leverage the advances in JavaScript since 2009, including the TypeScript compiler.