> For the complete documentation index, see [llms.txt](https://docs.mapbox.com/mapbox-gl-js/llms.txt)
# Fit to the bounds of a LineString
Get the bounds of a LineString by passing its first coordinates to [`LngLatBounds`](https://docs.mapbox.com/mapbox-gl-js/api/geography/#lnglatbounds) and chaining [`extend`](https://docs.mapbox.com/mapbox-gl-js/api/geography/#lnglatbounds#extend) to include the last coordinates.
> Example code:
**JavaScript**
```html
Fit to the bounds of a LineString
```
**React**
```jsx
import React, { useEffect, useRef } from 'react';
import * as mapboxgl from 'mapbox-gl/esm';
import 'mapbox-gl/dist/mapbox-gl.css';
const buttonStyle = {
font: "bold 12px/20px 'Helvetica Neue', Arial, Helvetica, sans-serif",
backgroundColor: '#3386c0',
color: '#fff',
position: 'absolute',
textAlign: 'center',
top: '20px',
left: '50%',
zIndex: 1,
border: 'none',
width: '200px',
marginLeft: '-100px',
display: 'block',
cursor: 'pointer',
padding: '10px 20px',
borderRadius: '3px'
};
const geojson = {
type: 'FeatureCollection',
features: [
{
type: 'Feature',
geometry: {
type: 'LineString',
coordinates: [
[-77.0366048812866, 38.89873175227713],
[-77.03364372253417, 38.89876515143842],
[-77.03364372253417, 38.89549195896866],
[-77.02982425689697, 38.89549195896866],
[-77.02400922775269, 38.89387200688839],
[-77.01519012451172, 38.891416957534204],
[-77.01521158218382, 38.892068305429156],
[-77.00813055038452, 38.892051604275686],
[-77.00832366943358, 38.89143365883688],
[-77.00818419456482, 38.89082405874451],
[-77.00815200805664, 38.88989712255097]
]
},
properties: {}
}
]
};
const MapboxExample = () => {
const mapContainerRef = useRef();
const mapRef = useRef();
const handleClick = () => {
const coordinates = geojson.features[0].geometry.coordinates;
const bounds = new mapboxgl.LngLatBounds(coordinates[0], coordinates[0]);
for (const coord of coordinates) {
bounds.extend(coord);
}
mapRef.current.fitBounds(bounds, {
padding: 20
});
};
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: 'mapbox://styles/mapbox/standard',
config: {
basemap: {
theme: 'monochrome'
}
},
center: [-77.0214, 38.897],
zoom: 12
});
mapRef.current.on('load', () => {
mapRef.current.addSource('LineString', {
type: 'geojson',
data: geojson
});
mapRef.current.addLayer({
id: 'LineString',
type: 'line',
source: 'LineString',
layout: {
'line-join': 'round',
'line-cap': 'round'
},
paint: {
'line-color': '#BF93E4',
'line-width': 5
}
});
});
return () => mapRef.current.remove();
}, []);
return (
<>
);
};
export default MapboxExample;
```