From: Evan You <yyx990803@gmail.com>
Date: Tue, 3 Mar 2020 18:26:32 +0000 (-0600)
Subject: fix(directives): ignore invalid directive hooks
X-Git-Tag: v3.0.0-alpha.8~16
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=7971b0468c81483dd7026204518f7c03187d13c4;p=thirdparty%2Fvuejs%2Fcore.git

fix(directives): ignore invalid directive hooks

fix #795
---

diff --git a/packages/runtime-core/src/directives.ts b/packages/runtime-core/src/directives.ts
index eea35b64d3..6f733eadcd 100644
--- a/packages/runtime-core/src/directives.ts
+++ b/packages/runtime-core/src/directives.ts
@@ -126,8 +126,9 @@ export function withDirectives<T extends VNode>(
     }
     // inject onVnodeXXX hooks
     for (const key in dir) {
-      if (!injected[key]) {
-        const { 0: hookName, 1: hook } = directiveToVnodeHooksMap[key]
+      const mapped = directiveToVnodeHooksMap[key]
+      if (mapped && !injected[key]) {
+        const { 0: hookName, 1: hook } = mapped
         const existing = props[hookName]
         props[hookName] = existing ? [].concat(existing, hook as any) : hook
         injected[key] = true