> For the complete documentation index, see [llms.txt](https://docs.mapbox.com/mapbox-gl-js/llms.txt)
# Add a generated icon to the map
This example uses [`addImage`](https://docs.mapbox.com/mapbox-gl-js/api/map/#map#addimage) to generate an icon at runtime and add it to a map style. Then it adds the icon to the map by including the `'layout': {'icon-image': 'gradient'}` statement inside [`addLayer`](https://docs.mapbox.com/mapbox-gl-js/api/map/#map#addlayer).
> Example code:
**JavaScript**
```html
Add a generated icon to the map
```
**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: 'map',
style: 'mapbox://styles/mapbox/standard',
center: [0, 0],
zoom: 2
});
mapRef.current.on('load', () => {
const width = 64;
const bytesPerPixel = 4;
const data = new Uint8Array(width * width * bytesPerPixel);
for (let x = 0; x < width; x++) {
for (let y = 0; y < width; y++) {
const offset = (y * width + x) * bytesPerPixel;
data[offset + 0] = (y / width) * 255;
data[offset + 1] = (x / width) * 255;
data[offset + 2] = 128;
data[offset + 3] = 255;
}
}
mapRef.current.addImage('gradient', {
width: width,
height: width,
data: data
});
mapRef.current.addSource('point', {
type: 'geojson',
data: {
type: 'FeatureCollection',
features: [
{
type: 'Feature',
geometry: {
type: 'Point',
coordinates: [0, 0]
}
}
]
}
});
mapRef.current.addLayer({
id: 'points',
type: 'symbol',
source: 'point',
layout: {
'icon-image': 'gradient'
}
});
});
}, []);
return ;
};
export default MapboxExample;
```