create-react-app: Failed to compile after install eslint locally (propTypes is not defined)

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Yes, on OSX Sierra.

create-react-app test
cd test/
yarn add eslint
yarn start

Should compile successfully.

yarn start failed to compile, showing error: propTypes is not defined

Run these commands in the project folder and fill in their results:

test@0.1.0 /Users/dinhquangtrung/Desktop/test
└── react-scripts@1.0.7

v8.1.0

5.0.3

Then, specify:

About this issue

@trungdq88 React removed PropTypes since version 15.5, see here you can use prop-types package for it.

+31

I got that same error on a state variable defined at class level. I guess it is the same issue, isn’t it ?

export default class MyComponent extends Component {
  state = {
    open: true
  }

Failed to compile.

./src/components/MultiSelect/index.js
  Line 7:  'state' is not defined  no-undef

+15

I had the same problem on a project with eslint installed globally. I solved this case by installing in eslint project: npm i eslint --save

bye jeff

Seem to only happen if installed eslint 4.x.

If you mean that you installed eslint locally in your project, this is not really supported. I know that people do this, but we don’t recommend it.

You don’t need to install it locally, it will work out of the box. Installing it locally can mess up the versions, which is what probably happened.