From 74e4e11b4478439e581818c483d27038cbbd62fb Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Mon, 10 Oct 2016 19:30:19 -0400
Subject: [PATCH] fix v-on handler with whitespaces (fix #3893)

---
 src/compiler/codegen/events.js             | 2 +-
 test/unit/modules/compiler/codegen.spec.js | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/compiler/codegen/events.js b/src/compiler/codegen/events.js
index cb0ca49a..79c79404 100644
--- a/src/compiler/codegen/events.js
+++ b/src/compiler/codegen/events.js
@@ -1,6 +1,6 @@
 /* @flow */
 
-const simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?'\]|\[".*?"\]|\[\d+\]|\[[A-Za-z_$][\w$]*\])*$/
+const simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?'\]|\[".*?"\]|\[\d+\]|\[[A-Za-z_$][\w$]*\])*\s*$/
 
 // keyCode aliases
 const keyCodes = {
diff --git a/test/unit/modules/compiler/codegen.spec.js b/test/unit/modules/compiler/codegen.spec.js
index 01ecdb0f..ad0f27e0 100644
--- a/test/unit/modules/compiler/codegen.spec.js
+++ b/test/unit/modules/compiler/codegen.spec.js
@@ -244,6 +244,14 @@ describe('codegen', () => {
     )
   })
 
+  // #3893
+  it('should not treat handler with unexpected whitespace as inline statement', () => {
+    assertCodegen(
+      '<input @input=" onInput ">',
+      `with(this){return _h('input',{on:{"input": onInput }})}`
+    )
+  })
+
   it('generate unhandled events', () => {
     assertCodegen(
       '<input @input="curent++">',