# Example: Heatmap layer This app reproduces Mapbox's [Create a heatmap layer](https://docs.mapbox.com/mapbox-gl-js/example/heatmap-layer/) example. ## Usage To run this example, you need a [Mapbox token](http://visgl.github.io/react-map-gl/docs/get-started/mapbox-tokens). You can either set it as `MAPBOX_TOKEN` in `src/app.js`, or set a `MapboxAccessToken` environment variable in the command line. ```bash npm i npm run start ```