Material-ui v4无法读取每个组件的undefined属性"root" [英] Material-ui v4 Cannot read property 'root' of undefined for every component

问题描述

我已经从Material-UI v3迁移到v4.现在对于我导入的每个组件都会显示此错误:

I've migrated from Material-UI v3 to v4.now this error shows up for every component I import:

app.js:3581未捕获的TypeError:无法读取属性
不确定的根"

app.js:3581 Uncaught TypeError: Cannot read property
'root' of undefined

在按钮上(app.js:3581)
在renderWithHooks(app.js:126202)
在updateForwardRef(app.js:127721)
在beginWork(app.js:128925)
在performUnitOfWork(app.js:132576)
在workLoop(app.js:132616)

at Button (app.js:3581)
at renderWithHooks (app.js:126202)
at updateForwardRef (app.js:127721)
at beginWork (app.js:128925)
at performUnitOfWork (app.js:132576)
at workLoop (app.js:132616)

app.js:130381上面的错误发生在组件中:
在WithStyles(ForwardRef(Button))中(由Rtl创建)
在StylesProvider中(由Rtl创建)
在Rtl中(由App创建)
在提供程序中(由App创建)
在应用程序中

app.js:130381 The above error occurred in the component:
in WithStyles(ForwardRef(Button)) (created by Rtl)
in StylesProvider (created by Rtl)
in Rtl (created by App)
in Provider (created by App)
in App

React和react-dom更新为指南说:

React and react-dom are updated as guide said:

"react": "^16.8.6",
"react-dom": "^16.8.6",
"@material-ui/core": "^4.0.0-rc.0",
"@material-ui/styles": "^4.0.0-rc.0",

我删除了/node_modules和yarn.lock并尝试了yarn，但是每个组件都显示错误.

I've removed /node_modules and yarn.lock and tried yarn but error shows up for every component.

也找到了这个问题，但没有任何解决方案...

Also found this issue but not any solution...

推荐答案

此

应添加到package.json

should be added to package.json

，并如所述此处

npm ls hoist-non-react-statics

将得到

├─┬ @material-ui/core@3.9.3
│ └── hoist-non-react-statics@3.3.0 
├─┬ material-ui@0.20.2
│ └─┬ recompose@0.26.0
│   └── hoist-non-react-statics@2.5.5  deduped
├─┬ react-hot-loader@4.12.0
│ └── hoist-non-react-statics@3.3.0 
├─┬ react-jss@8.6.1
│ └── hoist-non-react-statics@2.5.5 
├─┬ react-redux@7.1.0
│ └── hoist-non-react-statics@3.3.0 
├─┬ react-router@3.2.3
│ └── hoist-non-react-statics@2.5.5  deduped
└─┬ recompose@0.30.0
  └── hoist-non-react-statics@2.5.5  deduped

这可能是导致此问题的原因.

which is probably causing this issue.

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