How to Visualize and Style Routes on a MapLibre GL Map

In a previous tutorial , we covered route visualization with Leaflet. Now let's explore how to achieve the same with MapLibre GL. MapLibre GL offers powerful styling capabilities through its expression-based paint properties. Unlike raster-based libraries, MapLibre GL renders everything with WebGL, which means smooth zooming, rotation, and crisp lines at any scale. The key difference from Leaflet: MapLibre GL uses layers and sources instead of direct GeoJSON rendering. This approach offers more flexibility - you can update styles without re-adding layers, and the GPU handles rendering efficiently. This tutorial shows how to build a route visualization with interactive styling controls using MapLibre GL. You will learn to work with GeoJSON sources, line layers, and the Map Marker Icon API for custom markers. APIs used: Routing API - calculate route between waypoints Map Tiles API - vector map style Map Marker Icon API - custom waypoint markers What you will learn: How to add GeoJSON sou