From afb231ec5ce5ac77ff6260bea4d866ec2d5bbd85 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Mon, 15 Jun 2020 10:59:03 -0400
Subject: [PATCH] fix(compiler-core): skip empty expressions when validating
 expressions in browser mode

---
 packages/compiler-core/src/validateExpression.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/packages/compiler-core/src/validateExpression.ts b/packages/compiler-core/src/validateExpression.ts
index 64f171fca7f..3ba98572718 100644
--- a/packages/compiler-core/src/validateExpression.ts
+++ b/packages/compiler-core/src/validateExpression.ts
@@ -32,6 +32,13 @@ export function validateBrowserExpression(
   asRawStatements = false
 ) {
   const exp = node.content
+
+  // empty expressions are validated per-directive since some directives
+  // do allow empty expressions.
+  if (!exp.trim()) {
+    return
+  }
+
   try {
     new Function(
       asRawStatements