i’m learning go wasm, I came a cross
https://tutorialedge.net/golang/go-webassembly-tutorial/
it’s out dated for go version 1.12.3 darwin/amd64
I found out js.NewCallback() no longer available.
New function call js.FuncOf() it’s very hard for me to figure out.
Can any one kindly help.
Error message with js.NewCallback()
command-line-arguments
./main.go:21:25: undefined: js.NewCallback
Error message with js.FuncOf()
command-line-arguments
./main.go:21:34: cannot use add (type func([]js.Value)) as type func(js.Value, []js.Value) interface {} in argument to js.FuncOf
this is my main.go
package main
import (
“strconv”
“syscall/js”
//“github.com/dennwc/dom/js”
)
func add(i []js.Value) {
value1 := js.Global().Get(“document”).Call(“getElementById”, i[0].String()).Get(“value”).String()
value2 := js.Global().Get(“document”).Call(“getElementById”, i[1].String()).Get(“value”).String()
int1, _ := strconv.Atoi(value1)
int2, _ := strconv.Atoi(value2)
js.Global().Get("document").Call("getElementById", i[2].String()).Set("value", int1+int2)
//c <- true
}
func registerCallbacks() {
js.Global().Set(“add”, js.FuncOf(add))
}
func main() {
c := make(chan struct{}, 0)
println("WASM Go Initialized")
// register functions
registerCallbacks()
<-c
}