Leaflet.js — Complete Guide

Leaflet.js Basics — Setup, Map Creation & Tile Layers

Learn Leaflet.js from scratch: what Leaflet is, CDN setup, creating a map, tile layers, coordinates, zoom levels, and viewport controls explained step by step.

Leaflet.js Markers — Custom Icons, Popups & Clustering

Master Leaflet markers: standard markers, custom L.icon and DivIcon, popups with rich HTML, tooltips, clustering with MarkerCluster, and draggable markers.

Leaflet.js Shapes & GeoJSON — Circles, Polylines, Polygons

Master Leaflet vector layers: circles and circleMarkers, polylines, polygons, rectangles, GeoJSON data loading, styling, and choropleth maps explained.

Leaflet.js Layers & Controls — Layer Management, Overlays & Custom Controls

Master Leaflet layers control: layer groups vs feature groups, image and video overlays, zoom/scale controls, custom control creation, and layer management patterns.

Leaflet.js Events — Click Handling, Map Interactions & Event Propagation

Master Leaflet events: map events like click and zoom, layer events like mouseover and drag, event objects, propagation control, and custom events for interactive maps.

Leaflet.js Advanced — Plugins, Heatmaps, Routing & Performance

Master advanced Leaflet: popular plugins (heatmap, routing, draw, fullscreen), performance optimization for large datasets with clustering and canvas, and custom CRS.

Leaflet.js API Reference & Cheatsheet

Complete Leaflet.js v1.9 API reference: map configuration, tile layers, markers, popups, vector layers, GeoJSON, controls, events, utilities, and plugin CDN links.

Leaflet.js Tile Layers — Map Providers and Custom Tiles

Learn Leaflet.js tile layers: configure OpenStreetMap, Mapbox, and Google tile providers, create custom tile servers, handle tile loading events, and build multi-layer base map switching.

Leaflet.js GeoJSON — Rendering Geographic Data

Learn Leaflet.js GeoJSON: load and render geographic features, style polygons and lines, bind popups to features, filter data, and create choropleth maps with custom color scales.

Leaflet.js Marker Clustering — Grouping Points at Scale

Learn Leaflet.js marker clustering with Leaflet.markercluster: group thousands of markers into clusters, customize cluster icons, configure spiderfier behavior, and optimize performance.

Leaflet.js Heatmap — Density Visualization Layer

Learn Leaflet.js heatmap with leaflet.heat: visualize point density as a color gradient, configure radius and blur, adjust intensity, and build a real-time heatmap of user activity.

Leaflet.js Routing — Directions and Route Calculation

Learn Leaflet.js routing with Leaflet Routing Machine: calculate driving, walking, and cycling directions, display route instructions, customize waypoints, and build a route planner.

Leaflet.js Custom Controls — Building UI for Map Interactions

Learn Leaflet.js custom controls: create custom zoom controls, add toolbar buttons, build info panels, implement layer toggles, and position controls in custom map locations.

Leaflet.js Popups — Interactive Information Windows

Learn Leaflet.js popups: create styled popups with HTML content, bind popups to markers and layers, customize popup appearance and behavior, build interactive tooltips, and use popup events.

Leaflet.js Measurement — Distance and Area Tools

Learn Leaflet.js measurement: add distance measurement with Leaflet Draw, calculate area of drawn polygons, customize measurement units, build custom measurement controls, and handle geodesic calculations.

Leaflet.js Offline — Building Maps Without Internet

Learn Leaflet.js offline maps: cache tiles with a service worker, use PouchDB for tile storage, create offline-first map apps, pre-download tiles for regions, and handle connectivity changes.

Leaflet.js Performance — Optimizing Map Rendering

Learn Leaflet.js performance optimization: reduce tile load time, optimize marker rendering, use canvas for large datasets, debounce events, lazy load off-screen data, and profile map performance.

Leaflet.js Animations — Smooth Map Motion and Transitions

Learn Leaflet.js animations: animate map panning and zooming, fly to locations with custom duration, animate markers along paths, create pulsing markers, and build animated GeoJSON features.

Leaflet.js Project — Interactive City Explorer Map

Build a complete Leaflet.js city explorer map with layered POI data, clustering, routing, search, offline support, and responsive design for tourism information systems.