Numerous fixes for headless mode.

Remove script dom elements for internal calls.

assets/default/wails.js

@@ -157,6 +157,7 @@
 		return new Promise(function (resolve, reject) {
 
 			// Create a unique callbackID
+			debugger;
 			var callbackID;
 			do {
 				callbackID = bindingName + "-" + randomFunc();
@@ -202,6 +203,7 @@
 	function callback(incomingMessage) {
 		// Parse the message
 		var message
+		debugger;
 		try {
 			message = JSON.parse(incomingMessage)
 		} catch (e) {

assets/headless/index.html

@@ -101,6 +101,10 @@
         }
         s.textContent = script;
         document.head.appendChild(s)
+        if (script.indexOf("window.wails._.") == 0) {
+          var elem = document.querySelector('#' + id);
+          elem.parentNode.removeChild(elem);
+        }
       }
 
       function handleConnect() {
@@ -139,8 +143,13 @@
         }, 300);
       }
 
+      let idcounter = 0
+      function generateID() {
+        return "wails-" + idcounter++;
+      }
+
       function handleMessage(e) {
-        addScript(e.data);
+        addScript(e.data, generateID());
       }
 
       // Key listener
@@ -169,7 +178,6 @@
 
       connect();
 
-
     }());
 
   </script>

renderer_headless.go

@@ -125,16 +125,6 @@ func (h *Headless) start(conn *websocket.Conn) {
 		h.injectCSS(h.frameworkCSS)
 	}
 
-	// If given an HMTL fragment, mount it on #app
-	// Otherwise, replace the html tag
-	var injectHTML string
-	if h.appConfig.isHTMLFragment {
-		injectHTML = fmt.Sprintf("$('#app').html('%s')", h.appConfig.HTML)
-	} else {
-		injectHTML = fmt.Sprintf("$('html').html('%s')", h.appConfig.HTML)
-	}
-	h.evalJS(injectHTML)
-
 	// Inject user CSS
 	if h.appConfig.CSS != "" {
 		outputCSS := fmt.Sprintf("%.45s", h.appConfig.CSS)
@@ -274,7 +264,7 @@ func (h *Headless) NotifyEvent(event *eventData) error {
 		}
 	}
 
-	message := fmt.Sprintf("wails._.notify('%s','%s')", event.Name, data)
+	message := fmt.Sprintf("window.wails._.notify('%s','%s')", event.Name, data)
 	return h.evalJS(message)
 }