wasm js.FuncOf returns error

[Zambiorix]

The code below compiles fine with tinygo but when running I get the following error:

(index):1 Uncaught (in promise) LinkError: WebAssembly Instantiation: Import #5 module="env" function="syscall/js.valueInvoke" error: function import requires a callable
Promise.then (async)
(anonymous) @ (index):45

js.Global().Get("window").Call("addEventListener", "beforeunload", js.NewEventCallback(0, func(event js.Value) {

}))

The code compiles and runs without a problem when using the default go compiler

Edit : the error pops up when I isolate the js.NewEventCallback call ..so that is the culprit

[aykevl]

This has not yet been implemented, and will likely be implemented after #211.

[deadprogram]

Code for this has just landed in the dev branch with this PR #367

Now losing, please reopen if needed. Thank you!