On mobile, if I put the cursor on any word and press any key (even backspace), the word gets repeated at the current cursor position.

Something to do with touch events not being handled properly maybe?

Doesn't work at all for me on mobile Safari. I just see a block of uncolored preformatted text, and tapping on it has no effect (not even a cursor)

It used to work but I broke it on my own blog. You know, the shoemaker goes barefoot!

This is cool.

So can anybody tell me if I can write a go app and run it in the browser yet.

Years ago people were talking about WASM, but did it every take off?

Miguel Liezun used yaegi https://github.com/traefik/yaegi compiled to WASM to let Klipse evaluate Go code snippets in the browser

https://github.com/viebel/klipse/pull/393

How does it work with the std lib ? System calls surely don’t work in a wasm VM ?

You could compile Go to JS via GopherJS but doing so hardly makes sense outside of experiments as the size of the JS output is way too big.