chore(deps): update dependency leaflet to v1.9.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
leaflet (source)	1.9.3 -> 1.9.4
@types/leaflet (source)	1.9.0 -> 1.9.21

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Release Notes

Leaflet/Leaflet (leaflet)

v1.9.4

Compare Source

After two and a half years of hard work, we’re thrilled to announce the first alpha release of Leaflet 2.0!

This release marks a major modernization of the Leaflet codebase. We've dropped support for Internet Explorer, removed legacy methods and polyfills, adopted modern standards like Pointer Events, and now publish Leaflet as an ESM module. The global L is no longer part of the core package (though it’s still available in the bundled version leaflet-global.js for backward compatibility).

For more information checkout the blog post: https://leafletjs.com/2025/05/18/leaflet-2.0.0-alpha.html

What's New in Leaflet 2.0

• Targeting only evergreen browsers
• Switched from Mouse and Touch events to PointerEvents
• ESM support and tree shaking
• Rewritten using standardized ES6 classes

Migration

1. Replace all factory methods with constructor calls: L.marker(latlng) ➜ new Marker(latlng)
2. Change the <script> tag to module: <script type='module'>
3. Replace usage of L with explicit imports from the Leaflet package: import { Marker } from 'leaflet'
   • if you are not using a package manager like npm, you can use a importmap: https://leafletjs.com/examples/quick-start/
4. To have global access to variables of a module-script, assign them to the window object (Not recommended): window.map = map
5. Consider Leaflet V1 Polyfill if you are using outdated plugins

Old implementation

<script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
<script>
	const map = L.map('map').setView([51.505, -0.09], 13);
	const tiles = L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
		maxZoom: 19,
		attribution: '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
	}).addTo(map);
</script>

New implementation

Module

<script type="importmap">
	{
		"imports": {
			"leaflet": "https://unpkg.com/leaflet@2.0.0-alpha/dist/leaflet.js"
		}
	}
</script>
<script type="module">
	import L, {Map, TileLayer, Marker, Circle, Polygon, Popup} from 'leaflet';
	const map = new Map('map').setView([51.505, -0.09], 13);
	const tiles = new TileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
		maxZoom: 19,
		attribution: '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
	}).addTo(map);
</script>

Global Script

<script src="https://unpkg.com/leaflet@2.0.0-alpha/dist/leaflet-global.js"></script>
<script>
	const map = new L.Map('map').setView([51.505, -0.09], 13);
	const tiles = new L.TileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
		maxZoom: 19,
		attribution: '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
	}).addTo(map);
</script>

Need Legacy Support?

Check out this polyfill package to help ease the transition for legacy apps: Leaflet V1 Polyfill

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