reportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->Uncaught TypeError: Cannot read property 'userAgent' of undefined
at eval (<anonymous>:124:35)
at eval (<anonymous>:3:106)
at eval (<anonymous>:8:2)
at (app-service.js:670:1)
at webpack_require (app-service.js:80:30)
at eval (<anonymous>:7:1)
at (app-service.js:164:1)
at webpack_require (app-service.js:80:30)
at checkDeferredModules (app-service.js:46:23)
at webpackJsonpCallback (app-service.js:33:19)
1***@qq.com
- 发布：2025-05-08 20:42
- 更新：2025-07-11 19:34
- 阅读：304
产品分类： uniapp/App
PC开发环境操作系统： Windows
PC开发环境操作系统版本号： 1
HBuilderX类型： 正式
HBuilderX版本号： 4.57
手机系统： Android
手机系统版本号： Android 14
手机厂商： 华为
手机机型： vivo
页面类型： vue
vue版本： vue2
打包方式： 云端
项目创建方式： HBuilderX
操作步骤：
预期结果：
正常显示页面
正常显示页面
实际结果：
reportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->Uncaught TypeError: Cannot read property 'userAgent' of undefined
at eval (<anonymous>:124:35)
at eval (<anonymous>:3:106)
at eval (<anonymous>:8:2)
at (app-service.js:670:1)
at webpack_require (app-service.js:80:30)
at eval (<anonymous>:7:1)
at (app-service.js:164:1)
at webpack_require (app-service.js:80:30)
at checkDeferredModules (app-service.js:46:23)
at webpackJsonpCallback (app-service.js:33:19)
reportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->Uncaught TypeError: Cannot read property 'userAgent' of undefined
at eval (<anonymous>:124:35)
at eval (<anonymous>:3:106)
at eval (<anonymous>:8:2)
at (app-service.js:670:1)
at webpack_require (app-service.js:80:30)
at eval (<anonymous>:7:1)
at (app-service.js:164:1)
at webpack_require (app-service.js:80:30)
at checkDeferredModules (app-service.js:46:23)
at webpackJsonpCallback (app-service.js:33:19)
bug描述：
之前可正常运行项目，现在报白屏reportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->Uncaught TypeError: Cannot read property 'userAgent' of undefined
at eval (<anonymous>:124:35)
at eval (<anonymous>:3:106)
at eval (<anonymous>:8:2)
at (app-service.js:670:1)
at webpack_require (app-service.js:80:30)
at eval (<anonymous>:7:1)
at (app-service.js:164:1)
at webpack_require (app-service.js:80:30)
at checkDeferredModules (app-service.js:46:23)
at webpackJsonpCallback (app-service.js:33:19)
1 个回复
DCloud_UNI_OttoJi - 日常回复 uni-app/x 问题，如果艾特我没看到，请主动私信
at webpack_require (app-service.js:80:30)
at (app-service.js:164:1)
看下这两处位置具体如何使用的。看报错是 userAgent 参数报错。最好提供具体错误代码，提供更多信息，有助于定位和解答你的问题。