Welcome to Derw! Derw is a type-safe language in the ML family designed to replace or augment your TypeScript and JavaScript code - both on the client and the server. If you've never encountered an ML language before, some of the core principles - which Derw follows - is a clean and concise syntax, paired with a powerful type system. Here's some real world Derw code:
generateTypeAlias: TypeAlias -> string
generateTypeAlias syntax =
let
properties: string
properties =
List.map generateProperty syntax.properties
|> (\y -> y.join ",\n ")
typeDef: string
typeDef =
generateType syntax.type
in
if syntax.properties.length == 0 then
`type alias ${typeDef} = {\n}`
else
`type alias ${typeDef} = {\n ${properties}\n}`Derw is a language for those searching for a better syntax for writing type-heavy code. It is a general purpose language, for both the server and the client, built on top of the JavaScript platform. It has interop with Javascript and TypeScript built in - so that you can use existing code and libraries with minimal effort. Derw targets multiple languages - TypeScript, JavaScript, Elm, English and Derw itself. Derw's output generation is documented in the Gitbook, so it's easy to create code to interface between Derw and TypeScript.
If you want to write a website, both backend and frontend, Derw is a perfect choice for you.
- A testing framework (all of Derw's compiler tests use this library!)
- Performant web framework with server side rendering and hydration
- Bundling built into the CLI
- Write better code by leveraging a type system that guides your code.
- Integrate with your existing code bases through interop with JavaScript and TypeScript.
Head over to the Gitbook.
Homepage: https://www.derw-lang.com/
Blog: http://derw.substack.com/
Follow Derw on Twitter: https://twitter.com/derwlang
derw (/ˈdeːruː/, Welsh “oak”) is one of the native trees in Wales, famous for long life, tall stature, and hard, good quality wood. An English speaker might pronounce it as “deh-ru”.