docs(engine-core): add comment in patchDynamicEventListeners regardin…

…g freezing assumption
salesforce · Feb 28, 2025 · 52516ee · 52516ee
1 parent c6721f9
commit 52516ee
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/packages/@lwc/engine-core/src/framework/modules/dynamic-events.ts b/packages/@lwc/engine-core/src/framework/modules/dynamic-events.ts
@@ -22,6 +22,9 @@ export function patchDynamicEventListeners(
         data: { dynamicOn },
     } = vnode;
 
+    // The argument passed to lwc:on is frozen.
+    // Because of this, `oldVnode.data.dynamicOn` is deeply equal
+    // to its value from the previous render cycle.
     const oldDynamicOn =
         isNull(oldVnode) || isUndefined(oldVnode.data.dynamicOn)
             ? EmptyObject