This guide explores how to build a map data visualization with JavaScript (and React) using MapBox, a popular set of tools for working with maps and location-based search. The project uses Stack Overflow's open dataset, which contains users' locations as strings, but requires geocoding to work with Mapbox. The guide creates four independent map data visualizations: a heatmap layer showing where Stack Overflow users live, a points layer with dynamic styling and updated data source, a points layer with click events, and a choropleth layer showing total and average users' rankings by country. Each visualization is created using Cube, an open-source analytical API platform, to serve the dataset over an API, and React to create the front-end app. The project demonstrates how to use Mapbox data-driven styling and manipulations to customize the map and make it interactive.