Leaflet is the leading open-source JavaScript library for mobile-friendly interactive maps. Weighing just about 42 KB of JS, it has all the mapping features most developers ever need.

It is chilling to see Leaflet being used for documenting Russia’s war crimes, factual reporting of the war and for coordination of humanitarian efforts across Europe.

This reference reflects Leaflet 1.9.4. Check this list if you are using a different version of Leaflet. For the new Leaflet 2.0.0-alpha references go to Leaflet 2.0.0-alpha

A simple step-by-step guide that will quickly get you started with Leaflet basics, including setting up a Leaflet map (with OpenStreetMap tiles) on your page, working with markers, polylines …

This step-by-step guide will quickly get you started on Leaflet basics, including setting up a Leaflet map, working with markers, polylines and popups, and dealing with events.

GeoJSON is a very popular data format among many GIS technologies and services — it's simple, lightweight, straightforward, and Leaflet is quite good at handling it.

May 18, 2025 · This release marks a major modernization of the Leaflet codebase. We’ve dropped support for Internet Explorer, removed legacy methods and polyfills, adopted modern …

Learn the basics of Leaflet to create interactive maps and integrate them into your web applications effectively.

This is a case study of creating a colorful interactive choropleth map of US States Population Density with the help of GeoJSON and some custom controls (that will hopefully convince all …

A Leaflet map has one CRS (and one CRS only), that can be changed when creating the map. For our game map we’ll use CRS.Simple, which represents a square grid: