withRouter HOC does not provide propTypes from wrapped component

[javaguru-ch]

The HOC withRouter should copy the prop-types and default-props definition from the wrapped component. This is currently not the case.
In order to implement this the following code may be used:

import React from 'react'
import Route from './Route'

/**
 * A public higher-order component to access the imperative API
 */
const withRouter = (Component) => {
  const C = (props) => (
    <Route render={routeComponentProps => (
      <Component {...props} {...routeComponentProps}/>
    )}/>
  )

  C.displayName = `withRouter(${Component.displayName || Component.name})`

  // Copy the prop-types as well as the default-props from the wrapped component:
  C.propTypes = Component.propTypes
  C.defaultProps = Component.defaultProps

  return C
}

export default withRouter

[timdorr]

This isn't actually correct. withRouter's wrapper component isn't concerned with those props itself, so it shouldn't be validating them. Since we just pass though the props given to withRouter, they will be validated at the wrapped component level, as they should be.

If you need to access the wrapped component directly, #4838 should solve that for you when it lands.