fix(runtime-core): ensure mergeProps skips undefined event handlers (#5299)

fix #5296
2022-01-21 07:13:29 +01:00
parent 2f91872e7b
commit c35ec47d73
3 changed files with 6 additions and 1 deletions
--- a/packages/runtime-core/src/vnode.ts
+++ b/packages/runtime-core/src/vnode.ts
@@ -798,6 +798,7 @@ export function mergeProps(...args: (Data & VNodeProps)[]) {
        const existing = ret[key]
        const incoming = toMerge[key]
        if (
+          incoming &&
          existing !== incoming &&
          !(isArray(existing) && existing.includes(incoming))
        ) {