Add wasm demo to github pages

etc/_wasm.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+	"syscall/js"
+
+	"github.com/niklasfasching/go-org/org"
+)
+
+func main() {
+	js.Global().Call("initialized")
+
+	document := js.Global().Get("document")
+	in := document.Call("getElementById", "input")
+	out := document.Call("getElementById", "output")
+
+	js.Global().Set("run", js.NewCallback(func([]js.Value) {
+		in := strings.NewReader(in.Get("value").String())
+		html, err := org.NewDocument().Parse(in).Write(org.NewHTMLWriter())
+		if err != nil {
+			out.Set("innerHTML", fmt.Sprintf("<pre>%s</pre>", err))
+		} else {
+			out.Set("innerHTML", html)
+		}
+	}))
+
+	<-make(chan struct{}) // stay alive
+}