TypeScriptFrontend

TypeScript is JavaScript where the data comes with labels: a number is a number, a list of orders is a list of orders. The labels get checked while you write and are then removed, so what actually runs is ordinary JavaScript. The point is practical — rename a field or change what a function returns and you find out immediately, instead of a customer finding out for you. On top of that it gives you clearer ways to describe choices, data shapes and reusable pieces, and you can introduce it file by file.