'Proptypes' is not defined

Question

I\'m setting up a new React with the help of: https://github.com/facebookincubator/create-react-app

However, I\'m running into a linting issue. I\'m receiving the fo

Answer 1

If you're using <script> tags; you can add this tag:

<script src="https://cdnjs.cloudflare.com/ajax/libs/prop-types/15.7.2/prop-types.min.js" integrity="sha512-ssNhh7jlzc+K93ckIlSXFHHz6fSFv0l619WOv8xbFNRbFOujbasb42LVMOggDrQR1ScJncoWb+KAJx1uF3ipjw==" crossorigin="anonymous"></script>

You can get the minified/non-minified and other version here

Good Luck...

Answer 2

According to this issue comment.

It appears to be because you have installed eslint 4.x when you should just use the eslint version that is shipped with create-react-app. You should remove any eslint you have manually installed and use the one that comes with the repo.

Answer 3

Please install the prop-types npm package - react 1.15 and greater on separate package is created.

Here to install package

Answer 4

You can place the PropTypes just after the class (outside the class):

Routers.propTypes = {
   history: PropTypes.object.isRequired
}

Answer 5

Please Install prop-types

using this code : npm install --save prop-types

Answer 6

Since react 15.5, PropTypes is included in a separate package, 'prop-types'. So this line will help

import PropTypes from 'prop-types'

You can read more here