fix: 修复三级页跳转异常

src/web/staticres/common-module/keep-tags/keep-tags-template.js

@@ -235,6 +235,12 @@ var tempStyleComponent = `<style>
     }
 </style>`
 
+// 部分页面没有全局工具函数
+if (typeof utils !== 'object') {
+  utils = {}
+}
+utils.isWeiXinBrowser = navigator.userAgent.toLowerCase().indexOf('micromessenger') !== -1
+
 Vue.component('keep-component', {
   delimiters: ['@@', '@@'],
   template: `