add helpers

go-converts/wasm.go

@@ -0,0 +1,14 @@
+// +build js,wasm
+
+package converts
+
+import "syscall/js"
+
+func ToBytes(v js.Value) []byte {
+	buf := make([]byte, v.Length(), v.Length())
+	for i := 0; i < v.Length(); i++ {
+		buf[i] = byte(v.Index(i).Int())
+	}
+
+	return buf
+}