How to make google maps work with react - reactjs

Question

I'm trying to Map with a SearchBox in react but I'm not sure what I am missing from this code below. I've never used google maps before and the docs are really confusing. The error I get is that google is no defined and I'm assuming I need to import something but research has proven to be useless. I got the code from https://github.com/tomchentw/react-google-maps.
const _ = require("lodash");
const { compose, withProps, lifecycle } = require("recompose");
const {
withScriptjs,
withGoogleMap,
GoogleMap,
Marker,
} = require("react-google-maps");
const { SearchBox } = require("react-google-
maps/lib/components/places/SearchBox");
const MapWithASearchBox = compose(
withProps({
googleMapURL: "https://maps.googleapis.com/maps/api/js?
key=AIzaSyC4R6AN7SmujjPUIGKdyao2Kqitzr1kiRg&v=3.exp&libraries
=geometry,draw
ing,places",
loadingElement: <div style={{ height: `100%` }} />,
containerElement: <div style={{ height: `400px` }} />,
mapElement: <div style={{ height: `100%` }} />,
}),
lifecycle({
componentWillMount() {
const refs = {}
this.setState({
bounds: null,
center: {
lat: 41.9, lng: -87.624
},
markers: [],
onMapMounted: ref => {
refs.map = ref;
},
onBoundsChanged: () => {
this.setState({
bounds: refs.map.getBounds(),
center: refs.map.getCenter(),
})
},
onSearchBoxMounted: ref => {
refs.searchBox = ref;
},
onPlacesChanged: () => {
const places = refs.searchBox.getPlaces();
const bounds = new google.maps.LatLngBounds();
places.forEach(place => {
if (place.geometry.viewport) {
bounds.union(place.geometry.viewport)
} else {
bounds.extend(place.geometry.location)
}
});
const nextMarkers = places.map(place => ({
position: place.geometry.location,
}));
const nextCenter = _.get(nextMarkers, '0.position',
this.state.center);
this.setState({
center: nextCenter,
markers: nextMarkers,
});
// refs.map.fitBounds(bounds);
},
})
},
}),
withScriptjs,
withGoogleMap
)(props =>
<GoogleMap
ref={props.onMapMounted}
defaultZoom={15}
center={props.center}
onBoundsChanged={props.onBoundsChanged}
>
<SearchBox
ref={props.onSearchBoxMounted}
bounds={props.bounds}
controlPosition={google.maps.ControlPosition.TOP_LEFT}
onPlacesChanged={props.onPlacesChanged}
>
<input
type="text"
placeholder="Customized your placeholder"
style={{
boxSizing: `border-box`,
border: `1px solid transparent`,
width: `240px`,
height: `32px`,
marginTop: `27px`,
padding: `0 12px`,
borderRadius: `3px`,
boxShadow: `0 2px 6px rgba(0, 0, 0, 0.3)`,
fontSize: `14px`,
outline: `none`,
textOverflow: `ellipses`,
}}
/>
</SearchBox>
{props.markers.map((marker, index) =>
<Marker key={index} position={marker.position} />
)}
</GoogleMap>
);
<MapWithASearchBox />

Answer 1

This error is caused by linter, you need to explicitly read google global variable from window by adding the below line to the top of your file:
const google = window.google;
or to disable linter:
/*global google*/