Startup Heap details how it initially failed to switch from CoffeeScript to TypeScript programming language.

Civet is described as a kind of modern CoffeeScript for TypeScript, which may not sound promising if you remember CoffeeScript as I do. Before you write it off, though, consider what Civet has to ...

Microsoft could have done so, despite TypeScript being a rival in the JavaScript space. And, as she noted, developers also had Script# or CoffeeScript to make JavaScript programming easier.