CoffeeScript is a programming language that transcompiles to JavaScript. It adds syntactic sugar inspired by Ruby, Python and Haskell in an effort to enhance JavaScripts brevity and readability. Developed by Jeremy Ashkenas
License: Open Source
CoffeeScript is a lightweight language that simplifies JavaScript syntax and promotes functional programming, making it easier to write and maintain code. Dart, on the other hand, is a strongly typed language with a focus on performance and tooling, suitable for building complex applications, especially in mobile development.