Maps But Easy: An Intro to Leaflet JS

Just having a list of addresses usually doesn’t look nice. When you build an app to find the nearest coffee shop or track a delivery route, you need a visual map. Really slow/heavy mapping software slows down development. However, billing requirements from enterprise map APIs often just stop you from implementing maps entirely.

Leaflet JS offers an open-source JavaScript library alternative. The library lets you pretty easily drop an interactive map into your website using a few lines of code.

Leaflet acts as the middleman between your website and map data, allowing you to avoid building a map from scratch. The library places a transparent layer over existing map images. Developers call these images tiles. Community-driven services like OpenStreetMap provide these tiles for free.

Once the map shows up on your screen, you draw directly on the surface. You can drop custom pins. You can shade specific neighborhoods. You can do a lot of things, such as highlight exact delivery routes based on your data.

Developers choose Leaflet for many practical reasons.

The library is literally only 42 KB. The small file size ensures the map loads instantly on slow mobile networks. The compact size keeps your app fast and responsive.

You don’t need a background in Geographic Information Systems to use Leaflet. You only require basic HTML and JavaScript knowledge to center a map on a specific city and add a marker. (It’s a lot easier than you’d think)

Leaflet gives you total control over map imagery. You choose where your map images come from. You select standard street maps or stylized dark-mode maps from Mapbox. You even import your own custom images to map a video game level or a building floor plan.

Users also interact with the map immediately upon loading. Users drag to pan around the area and scroll to zoom in on a computer. Mobile users pinch to zoom on their screens. You can attach text pop-ups to your markers. A user can click a pin, and a bubble will appear with more information.

Adding a map to your project shouldn’t require a struggle. Leaflet gets rid of the complexity of web mapping. The library gives you a simple and fast interactive map, while you maintain full control over the user experience. Next time you build an application involving real-world locations, just quickly drop Leaflet into your project, and it’s easy to go from there.