From 4891e472c0d3b0cbb704a3297249931805a74c18 Mon Sep 17 00:00:00 2001
From: zhangbingce <zhangbingce@huawei.com>
Date: Mon, 27 Sep 2021 14:32:16 +0800
Subject: [PATCH] fix error log in media query--lts

Signed-off-by: zhangbingce <zhangbingce@huawei.com>
---
 runtime/main/model/compiler.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/runtime/main/model/compiler.ts b/runtime/main/model/compiler.ts
index 8f6e1781..614746fd 100644
--- a/runtime/main/model/compiler.ts
+++ b/runtime/main/model/compiler.ts
@@ -407,7 +407,10 @@ function compileCustomComponent(
  */
 function resetElementStyle(vm: Vm, element: Element): void {
   // Add judgment statements to avoid repeatedly calling 'setClass' function.
-  const len = element.children.length;
+  let len = 0;
+  if (element.children !== undefined) {
+    len = element.children.length;
+  }
   const css = vm.css || {};
   const mqArr = css['@MEDIA'];
   for (let ii = 0; ii < len; ii++) {