fix: allow events to continue propagating following an error

Author: Rich-Harris

.changeset/light-penguins-invent.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: allow events to continue propagating following an error

packages/svelte/src/internal/client/dom/elements/events.js

@@ -122,36 +122,44 @@ export function handle_event_propagation(handler_element, event) {
 		}
 	});
 
-	while (current_target !== null) {
+	/** @param {Element} current_target */
+	function next(current_target) {
 		/** @type {null | Element} */
 		var parent_element =
 			current_target.parentNode || /** @type {any} */ (current_target).host || null;
-		var internal_prop_name = '__' + event_name;
-		// @ts-ignore
-		var delegated = current_target[internal_prop_name];
-
-		if (delegated !== undefined && !(/** @type {any} */ (current_target).disabled)) {
-			if (is_array(delegated)) {
-				var [fn, ...data] = delegated;
-				fn.apply(current_target, [event, ...data]);
-			} else {
-				delegated.call(current_target, event);
+
+		try {
+			// @ts-expect-error
+			var delegated = current_target['__' + event_name];
+
+			if (delegated !== undefined && !(/** @type {any} */ (current_target).disabled)) {
+				if (is_array(delegated)) {
+					var [fn, ...data] = delegated;
+					fn.apply(current_target, [event, ...data]);
+				} else {
+					delegated.call(current_target, event);
+				}
+			}
+		} finally {
+			if (
+				event.cancelBubble ||
+				parent_element === handler_element ||
+				parent_element === null ||
+				current_target === handler_element
+			) {
+				return;
 			}
-		}
 
-		if (
-			event.cancelBubble ||
-			parent_element === handler_element ||
-			current_target === handler_element
-		) {
-			break;
+			next(parent_element);
 		}
-
-		current_target = parent_element;
 	}
 
-	// @ts-expect-error is used above
-	event.__root = handler_element;
-	// @ts-expect-error is used above
-	current_target = handler_element;
+	try {
+		next(current_target);
+	} finally {
+		// @ts-expect-error is used above
+		event.__root = handler_element;
+		// @ts-expect-error is used above
+		current_target = handler_element;
+	}
 }