'Proptypes' is not defined

Question

I'm setting up a new React with the help of: Create React App

However, I'm running into a linting issue. I'm receiving the following linting error 'PropTypes' is not defined. (no-undef).

Here is the code that is causing the issue:

import React, { Component } from 'react'; import PropTypes from 'prop-types';  class Routers extends Component {   static propTypes = {     history: PropTypes.object.isRequired   };  ... 

I tried playing around with the react/prop-types rule, but to no avail.

Answer 1

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

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.