uniapp运行真机测试时出现 undefined is not an object (evaluating 'document.documentMode')怎么解决

reportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->Exception: TypeError: undefined is not an object (evaluating 'document.documentMode')  
10:35:50.473 weex createInstanceContext:44234:47  
10:35:50.506 __webpack_require__@weex createInstanceContext:79:34  
10:35:50.537 weex createInstanceContext:45019:31  
10:35:50.568 __webpack_require__@weex createInstanceContext:79:34  
10:35:50.600 weex createInstanceContext:44750:40  
10:35:50.631 __webpack_require__@weex createInstanceContext:79:34  
10:35:50.669 weex createInstanceContext:44534:33  
10:35:50.700 __webpack_require__@weex createInstanceContext:79:34  
10:35:50.732 weex createInstanceContext:52902:39  
10:35:50.763 __webpack_require__@weex createInstanceContext:52716:35  
10:35:50.794 weex createInstanceContext:53783:40  
10:35:50.825 __webpack_require__@weex createInstanceContext:52716:35  
10:35:50.858 weex createInstanceContext:52780:37  
10:35:50.889 weex createInstanceContext:52781:12  
10:35:50.920 __webpack_require__@weex createInstanceContext:79:34  
10:35:50.952 weex createInstanceContext:1497:35  
10:35:50.983 __webpack_require__@weex createInstanceContext:1210:31  
10:35:51.014 weex createInstanceContext:1924:32  
10:35:51.046 __webpack_require__@weex createInstanceContext:1210:31  
10:35:51.077 weex createInstanceContext:1551:35  
10:35:51.108 __webpack_require__@weex createInstanceContext:1210:31  
10:35:51.128 weex createInstanceContext:1274:35  
10:35:51.149 weex createInstanceContext:1275:10  
10:35:51.170 weex createInstanceContext:42799:34  
10:35:51.192 __webpack_require__@weex createInstanceContext:79:34  
10:35:51.212 eval code  
10:35:51.233 eval@[native code]  
10:35:51.265 weex createInstanceContext:163:5  
10:35:51.296 __webpack_require__@weex createInstanceContext:79:34  
10:35:51.335 checkDeferredModules@weex createInstanceContext:46:42  
10:35:51.367 webpackJsonpCallback@weex createInstanceContext:33:39  
10:35:51.398 global code@weex createInstanceContext:154:57  
10:35:51.460 getTemplateInfo== template md5 null ,httpHeader:{}