From 9e664954a2cc21ed67871535c9ca792a3c1ef28d Mon Sep 17 00:00:00 2001
From: yuche <i@yuche.me>
Date: Tue, 23 Oct 2018 10:48:57 +0800
Subject: [PATCH] =?UTF-8?q?fix(transformer):=20=E4=BD=BF=E7=94=A8=E6=8C=82?=
 =?UTF-8?q?=E8=BD=BD=E5=9C=A8=20this=20=E4=B8=8B=E7=9A=84=E5=8F=98?=
 =?UTF-8?q?=E9=87=8F=E6=B8=B2=E6=9F=93=E5=8F=AF=E8=83=BD=E4=BC=9A=E6=8A=A5?=
 =?UTF-8?q?=E9=94=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 packages/taro-transformer-wx/src/render.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/taro-transformer-wx/src/render.ts b/packages/taro-transformer-wx/src/render.ts
index 3cf8590c2a0f..8bd7b5a988a5 100644
--- a/packages/taro-transformer-wx/src/render.ts
+++ b/packages/taro-transformer-wx/src/render.ts
@@ -1331,7 +1331,7 @@ export class RenderParser {
     this.renderPath.node.body.body.unshift(
       template(`this.__state = arguments[0] || this.state || {};`)(),
       template(`this.__props = arguments[1] || this.props || {};`)(),
-      t.variableDeclaration(
+      this.usedThisProperties.size ? t.variableDeclaration(
         'const',
         [
           t.variableDeclarator(
@@ -1342,7 +1342,7 @@ export class RenderParser {
             t.thisExpression()
           )
         ]
-      )
+      ) : t.emptyStatement()
     )
 
     if (t.isIdentifier(this.renderPath.node.key)) {