> For the complete documentation index, see [llms.txt](https://docs.mapbox.com/mapbox-gl-js/llms.txt)
# Add a raster tile source
This example adds third-party raster tiles to a map by defining a custom style.
The [style](https://docs.mapbox.com/help/glossary/style/) defines a [`raster` source](https://docs.mapbox.com/style-spec/reference/sources/#raster) with an external URL template for the `tiles` parameter. The source is used by a [`raster` layer](https://docs.mapbox.com/style-spec/reference/layers/#raster).
> Example code:
**JavaScript**
```html
Add a raster tile source
```
**React**
```jsx
import React, { useEffect, useRef } from 'react';
import * as mapboxgl from 'mapbox-gl/esm';
import 'mapbox-gl/dist/mapbox-gl.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,
style: {
version: 8,
sources: {
'raster-tiles': {
type: 'raster',
tiles: ['https://tile.openstreetmap.org/{z}/{x}/{y}.png'],
tileSize: 256,
attribution:
'© OpenStreetMap contributors'
}
},
layers: [
{
id: 'simple-tiles',
type: 'raster',
source: 'raster-tiles',
minzoom: 0,
maxzoom: 22
}
]
},
center: [-74.5, 40], // starting position
zoom: 2 // starting zoom
});
}, []);
return ;
};
export default MapboxExample;
```