> For the complete documentation index, see [llms.txt](https://docs.mapbox.com/mapbox-gl-js/ja/llms.txt)
# Add a default marker to a web map
This example adds two [markers](https://docs.mapbox.com/help/glossary/marker/) to a web map using the [`Marker`](https://docs.mapbox.com/mapbox-gl-js/ja/api/markers/#marker) class in Mapbox GL JS.
`marker1` is centered at the coordinates `12.554729, 55.70651` near Copenhagen. It uses the default marker color.
`marker2` uses options to define the `color` and `rotation` [parameters](https://docs.mapbox.com/mapbox-gl-js/ja/api/markers/#marker-parameters) for the new `Marker` object.
Also see the [related links section](#related-links) at the bottom for more tutorials and examples.
> Example code:
**JavaScript**
```html
Add a default marker to a web 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: [12.550343, 55.665957],
zoom: 8
});
new mapboxgl.Marker()
.setLngLat([12.554729, 55.70651])
.addTo(mapRef.current);
new mapboxgl.Marker({ color: 'black', rotation: 45 })
.setLngLat([12.65147, 55.608166])
.addTo(mapRef.current);
return () => mapRef.current.colorremove();
}, []);
return ;
};
export default MapboxExample;
```
## Related Links
> **Related content (video): [Custom Markers](null)**
>
> If you would like to customize your markers with images or other HTML functionality, see our Custom Markers video tutorial.
> **Related content (example): [Markers with Symbol Layers](https://docs.mapbox.com/mapbox-gl-js/ja/example/geojson-markers/)**
>
> See **Add markers to a web map with a symbol layer** for a more complex but more flexible approach to visualizing point features using GeoJSON data and a `symbol` layer.