fixed data handling when no data is supplied

src/runtime/internal/lifecycle.ts

@@ -1,4 +1,4 @@
-import { custom_event } from './dom';
+import {custom_event} from './dom';
 
 export let current_component;
 
@@ -27,9 +27,7 @@ export function onDestroy(fn: () => any) {
 	get_current_component().$$.on_destroy.push(fn);
 }
 
-export function createEventDispatcher<
-	EventMap extends {} = any
->(): <EventKey extends Extract<keyof EventMap, string>>(type: EventKey, detail?: EventMap[EventKey]) => void {
+export function createEventDispatcher<EventMap extends {} = any>(): <EventKey extends Extract<keyof EventMap, string>>(type: EventKey, detail?: EventMap[EventKey]) => void {
 	const component = get_current_component();
 
 	return (type: string, detail?: any) => {
@@ -51,7 +49,8 @@ export function createEventDispatcher<
 			// in a server (non-DOM) environment?
 			try {
 				const event = custom_event(type, detail);
-				eventBinding[0].call(component, event, eventBinding[1].data);
+				const data = eventBinding[1] && Object.prototype.hasOwnProperty.call(eventBinding[1], 'data') ? eventBinding[1].data : {};
+				eventBinding[0].call(component, event, data);
 			} catch (e) {
 				console.warn(`A component was instantiated with invalid event:bindings -  ${e}`);
 			}
@@ -61,7 +60,8 @@ export function createEventDispatcher<
 			// in a server (non-DOM) environment?
 			try {
 				const event = custom_event(type, detail);
-				catchAll[0].call(component, event, catchAll[1].data);
+				const data = catchAll[1] && Object.prototype.hasOwnProperty.call(catchAll[1], 'data') ? catchAll[1].data : {};
+				catchAll[0].call(component, event, data);
 			} catch (e) {
 				console.warn(`A component was instantiated with invalid event:bindings -  ${e}`);
 			}
@@ -71,7 +71,8 @@ export function createEventDispatcher<
 			// in a server (non-DOM) environment?
 			try {
 				const event = custom_event(type, detail);
-				catchAllBinding[0].call(component, event, catchAllBinding[1].data);
+				const data = catchAllBinding[1] && Object.prototype.hasOwnProperty.call(catchAllBinding[1], 'data') ? catchAllBinding[1].data : {};
+				catchAllBinding[0].call(component, event, data);
 			} catch (e) {
 				console.warn(`A component was instantiated with invalid on:* configuration -  ${e}`);
 			}
@@ -95,14 +96,9 @@ export function hasContext(key): boolean {
 	return get_current_component().$$.context.has(key);
 }
 
-// TODO figure out if we still want to support
+// TODO figure out if we still want to support - yes we do :)
 // shorthand events, or if we want to implement
 // a real bubbling mechanism
 export function bubble(component, event) {
-	const callbacks = component.$$.callbacks[event.type];
-
-	if (callbacks) {
-		// @ts-ignore
-		callbacks.slice().forEach(fn => fn.call(this, event));
-	}
+	component.$$.ctx[0]['event:bindings'][event.type][0](component.$$.ctx[0]['event:bindings'][event.type][1]);
 }