Adding pop-up to GeoJSON layer in Leaflet

Level Up Your Leaflet Maps: Adding Pop-Ups to GeoJSON Layers

Leaflet, hands down, is one of the coolest JavaScript libraries out there for whipping up interactive maps. And if you’re like me, you’ve probably already discovered the magic of displaying GeoJSON data – turning raw geographic info into something visually engaging. But here’s the thing: a map is just a pretty picture until you give people a way to explore the details. That’s where pop-ups come in! They’re like little windows into your data, popping up with extra info when someone clicks a feature. Let’s dive into how to make it happen.

GeoJSON and Leaflet: A Quick Refresher

Okay, before we get our hands dirty with code, let’s make sure we’re on the same page. GeoJSON is basically a universal language for describing geographic stuff – points, lines, polygons, you name it. Think of it as the blueprint for your map features. Leaflet then takes that blueprint and brings it to life on the screen. The real magic starts when you use Leaflet’s L.geoJSON() function; it’s your one-stop shop for displaying all that GeoJSON data in a map-friendly way.

Pop-Ups: The Easy Way

So, how do we add those nifty pop-ups? The easiest way is to use the onEachFeature option when you’re creating your GeoJSON layer. Trust me, it’s not as scary as it sounds! This option lets you run a function on each feature before it gets added to the map. Inside that function, you can grab the feature’s properties and “bind” a pop-up to it.

Here’s a snippet to get you started:

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