From 7c754623541c492161f7976203f0b1697a9a0113 Mon Sep 17 00:00:00 2001
From: Kawokas <usenet.kawokas.jp@gmail.com>
Date: Tue, 30 Mar 2021 18:37:56 +0900
Subject: [PATCH] fix(types): changed expression type to optional string
 (#11189)

fix #10871
---
 types/test/options-test.ts | 17 +++++++++++++++++
 types/vnode.d.ts           |  2 +-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/types/test/options-test.ts b/types/test/options-test.ts
index 024916b4..cb8fa2e3 100644
--- a/types/test/options-test.ts
+++ b/types/test/options-test.ts
@@ -482,3 +482,20 @@ Vue.component('functional-component-v-model', {
 
 
 Vue.component('async-es-module-component', () => import('./es-module'))
+
+Vue.component('directive-expression-optional-string', {
+  render(createElement) {
+    return createElement("div", {
+      directives: [
+        {
+          name: 'has-expression',
+          value: 2,
+          expression: '1 + 1',
+        }, {
+          name: 'no-expression',
+          value: 'foo',
+        },
+      ],
+    })
+  }
+});
diff --git a/types/vnode.d.ts b/types/vnode.d.ts
index dc4470ff..04b058cb 100644
--- a/types/vnode.d.ts
+++ b/types/vnode.d.ts
@@ -69,7 +69,7 @@ export interface VNodeDirective {
   name: string;
   value?: any;
   oldValue?: any;
-  expression?: any;
+  expression?: string;
   arg?: string;
   oldArg?: string;
   modifiers?: { [key: string]: boolean };