This is very cool: > this book contains a repl, and you can summon it whenever you’d like by pressing the escape key on your keyboard. The book will then start

This is very cool: > this book contains a repl, and you can summon it whenever you’d like by pressing the escape key on your keyboard. The book will then start downloading like a megabyte of JavaScript and WebAssembly, and once it’s done you will be able to try out Janet right here in the comfort of your browser. No need to install anything; no need to leave the comfort of this book website if you’d like to test something out. > The repl is not just a repl, though. It is also a portal into conversation with me, the author. You can use the repl to report typos or factual errors, ask questions, or express confusion. I won’t be able to respond in the repl, but if you include some kind of contact information in your reports I will make an effort to follow up with you.