feat(rstream): add support for event listener opts in fromEvent()

thi-ng · Jul 4, 2018 · d5ac264 · d5ac264
1 parent 9ffa346
commit d5ac264
Showing 1 changed file with 13 additions and 4 deletions.
diff --git a/packages/rstream/src/from/event.ts b/packages/rstream/src/from/event.ts
@@ -1,9 +1,18 @@
 import { Stream } from "../stream";
 
-export function fromEvent(src: EventTarget, id: string) {
+/**
+ * Creates a new stream of DOM events attached to given element / event
+ * target and using given event listener options (same as supported by
+ * `addEventListener()`, default: false).
+ *
+ * @param src event target
+ * @param name event name
+ * @param opts listener opts
+ */
+export function fromEvent(src: EventTarget, name: string, opts: boolean | AddEventListenerOptions = false) {
     return new Stream<Event>((stream) => {
         let listener = (e) => stream.next(e);
-        src.addEventListener(id, listener);
-        return () => src.removeEventListener(id, listener);
-    }, `event-${id}-${Stream.NEXT_ID++}`);
+        src.addEventListener(name, listener, opts);
+        return () => src.removeEventListener(name, listener, opts);
+    }, `event-${name}-${Stream.NEXT_ID++}`);
 }