Hello!

I've been experimenting these past 2 weeks on my spare time, trying to expose arunCode global at the frontend, that will allow users to run arbitrary Go code, purely on the client side, it is heavily inspired by the gopher playground.

I removed the UI parts, and made some modifications, but I seem to be hitting a roadblock,
when trying to use

runCode(`package mainimport ("fmt""syscall/js")func main() {fmt.Println("Hello, playground")js.Global().Call("alert", "Hello, JavaScript")js.Global().Get("console").Call("log", "Hello, JS console")}`)

I end up getting

$mapIndex is not defined

this error originates fromfmt.Println function only, other fmt functions I've tested work as expected.

Also, I've noticed that in the original code, there's a loading phase first, and then a run, it seems necessary in my case too, (running the code seems to be doing the loading phase + running, which throws some errors, but running again, will just run the code without loading, and result with no console errors) I'm just not sure as to how to implement it.

the altered code can be found herehttps://github.com/naorzr/gopherjs-runtime/blob/master/playground/main.go
and it can be run and played with by running theindex.html from this repo
https://github.com/naorzr/gopherjs-runtime/tree/master/playground