> For the complete documentation index, see [llms.txt](https://docs.mapbox.com/mapbox-gl-js/llms.txt)
# Accept coordinates as input to a geocoder
This example uses the [mapbox-gl-geocoder](https://github.com/mapbox/mapbox-gl-geocoder) control to enable users to search for places using the [Mapbox Geocoding API](https://docs.mapbox.com/api/search/geocoding/), and accept geographic [coordinates](https://docs.mapbox.com/help/glossary/lat-lon/) in the search query.
Search for coordinates like *-40, 170* to see the geocoder return a result.
> Example code:
**JavaScript**
```html
Accept coordinates as input to a geocoder
```
**React**
```jsx
import React, { useEffect, useRef } from 'react';
import * as mapboxgl from 'mapbox-gl/esm';
import MapboxGeocoder from '@mapbox/mapbox-gl-geocoder';
import 'mapbox-gl/dist/mapbox-gl.css';
import '@mapbox/mapbox-gl-geocoder/dist/mapbox-gl-geocoder.css';
const MapboxExample = () => {
const mapContainerRef = useRef();
const mapRef = useRef();
useEffect(() => {
mapRef.current = new mapboxgl.Map({
// TO MAKE THE MAP APPEAR YOU MUST
// ADD YOUR ACCESS TOKEN FROM
// https://account.mapbox.com
accessToken: 'YOUR_MAPBOX_ACCESS_TOKEN',
container: mapContainerRef.current,
// Choose from Mapbox's core styles, or make your own style with Mapbox Studio
style: 'mapbox://styles/mapbox/standard',
center: [-79.4512, 43.6568],
zoom: 8
});
/* Given a query in the form "lng, lat" or "lat, lng"
* returns the matching geographic coordinate(s)
* as search results in carmen geojson format,
* https://github.com/mapbox/carmen/blob/master/carmen-geojson.md */
const coordinatesGeocoder = (query) => {
// Match anything which looks like
// decimal degrees coordinate pair.
const matches = query.match(
/^[ ]*(?:Lat: )?(-?\d+\.?\d*)[, ]+(?:Lng: )?(-?\d+\.?\d*)[ ]*$/i
);
if (!matches) {
return null;
}
function coordinateFeature(lng, lat) {
return {
center: [lng, lat],
geometry: {
type: 'Point',
coordinates: [lng, lat]
},
place_name: 'Lat: ' + lat + ' Lng: ' + lng,
place_type: ['coordinate'],
properties: {},
type: 'Feature'
};
}
const coord1 = Number(matches[1]);
const coord2 = Number(matches[2]);
const geocodes = [];
if (coord1 < -90 || coord1 > 90) {
// must be lng, lat
geocodes.push(coordinateFeature(coord1, coord2));
}
if (coord2 < -90 || coord2 > 90) {
// must be lat, lng
geocodes.push(coordinateFeature(coord2, coord1));
}
if (geocodes.length === 0) {
// else could be either lng, lat or lat, lng
geocodes.push(coordinateFeature(coord1, coord2));
geocodes.push(coordinateFeature(coord2, coord1));
}
return geocodes;
};
// Add the control to the map (You will need to import MapboxGeocoder)
mapRef.current.addControl(
new MapboxGeocoder({
accessToken: 'YOUR_MAPBOX_ACCESS_TOKEN',
useBrowserFocus: true,
localGeocoder: coordinatesGeocoder,
zoom: 4,
placeholder: 'Try: -40, 170',
mapboxgl: mapboxgl,
reverseGeocode: true
})
);
}, []);
return ;
};
export default MapboxExample;
```