add typings for createEventDispatcher (#5260)

5 years ago · 1226bdd771
parent 41dd18b8b9
commit 1226bdd771
1 changed files with 4 additions and 2 deletions
--- a/src/runtime/internal/lifecycle.ts
+++ b/src/runtime/internal/lifecycle.ts
@ -27,7 +27,9 @@ export function onDestroy(fn) {
 	get_current_component().$$.on_destroy.push(fn);
 }

-export function createEventDispatcher() {
+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) => {