chore: ensure we use event system code paths throughout (#11640)

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

@@ -2,7 +2,7 @@ import { DEV } from 'esm-env';
 import { hydrating } from '../hydration.js';
 import { get_descriptors, get_prototype_of, map_get, map_set } from '../../utils.js';
 import { AttributeAliases, DelegatedEvents, namespace_svg } from '../../../../constants.js';
-import { delegate } from './events.js';
+import { create_event, delegate } from './events.js';
 import { autofocus } from './misc.js';
 import { effect, effect_root } from '../../reactivity/effects.js';
 import * as w from '../../warnings.js';
@@ -150,9 +150,13 @@ export function set_attributes(element, prev, next, lowercase_attributes, css_ha
 			if (value != null) {
 				if (!delegated) {
 					if (!prev) {
-						events.push([key, value, () => element.addEventListener(event_name, value, opts)]);
+						events.push([
+							key,
+							value,
+							() => (next[key] = create_event(event_name, element, value, opts))
+						]);
 					} else {
-						element.addEventListener(event_name, value, opts);
+						next[key] = create_event(event_name, element, value, opts);
 					}
 				} else {
 					// @ts-ignore

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

@@ -6,18 +6,14 @@ import { define_property, is_array } from '../../utils.js';
  * @param {string} event_name
  * @param {Element} dom
  * @param {EventListener} handler
- * @param {boolean} capture
- * @param {boolean} [passive]
- * @returns {void}
+ * @param {AddEventListenerOptions} options
  */
-export function event(event_name, dom, handler, capture, passive) {
-	var options = { capture, passive };
-
+export function create_event(event_name, dom, handler, options) {
 	/**
 	 * @this {EventTarget}
 	 */
 	function target_handler(/** @type {Event} */ event) {
-		if (!capture) {
+		if (!options.capture) {
 			// Only call in the bubble phase, else delegated events would be called before the capturing events
 			handle_event_propagation(dom, event);
 		}
@@ -28,6 +24,21 @@ export function event(event_name, dom, handler, capture, passive) {
 
 	dom.addEventListener(event_name, target_handler, options);
 
+	return target_handler;
+}
+
+/**
+ * @param {string} event_name
+ * @param {Element} dom
+ * @param {EventListener} handler
+ * @param {boolean} capture
+ * @param {boolean} [passive]
+ * @returns {void}
+ */
+export function event(event_name, dom, handler, capture, passive) {
+	var options = { capture, passive };
+	var target_handler = create_event(event_name, dom, handler, options);
+
 	// @ts-ignore
 	if (dom === document.body || dom === window || dom === document) {
 		render_effect(() => {