error 'google' is not defined no-undef

This doc: https://tomchentw.github.io/react-google-maps/basics/directions isn’t working at all.

can’t get around: error ‘google’ is not defined no-undef

I did find a solution that is partly working, e.g. using

  return (
       <GoogleMapLoader
               containerElement={mapContainer}
               googleMapElement={
                   <GoogleMap  
                       defaultZoom={12}
                       defaultCenter={this.props.center}
                       options={{ streetviewcontrol: false, mapTypeControl: true}}>
                   </GoogleMap>
               } 

But I have no idea how to match this to the tutorial with componentDidMount etc. to get it to work with the direction service. Any help is greatly appreciated.

[voquockhanh]

add this line to top of your file: /*global google*/ -> for disable ESLint

[johnanisere]

const google=window.google solves this problem.You see this because reactjs use a linting rule that forbids unknown global variables.