First steps with ruby.wasm: or how we built Ruby Next Playground

The web browser has come all the way from being an HTML/CSS renderer to a sophisticated execution environment, from being a thin client to becoming a thick one… and beyond (if there is no need for a server, should you call yourself a client?) Now, thanks to WebAssembly support, you can write a program in (almost) any language and run it on a web page. And Ruby is no exception. Allow me to share my first and still-fresh impressions of putting Ruby online!.