githubmirror/Leaflet

debug/map/canvas.html

51 строка1 KB

Jon Koops

Drop UMD and make ESM the default entrypoint (#8826)

17 мар 2025, 17:59

17 мар 2025, 17:597ac9875

<!doctype html>
<html lang="en">
	<head>
		<meta charset="utf-8" />
		<title>Leaflet debug page - Canvas</title>
		<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=0" />
		<link rel="stylesheet" href="../../dist/leaflet.css" />
		<link rel="stylesheet" href="../css/screen.css" />
		<script type="importmap">
			{
				"imports": {
					"leaflet": "../../dist/leaflet-src.js"
				}
			}
		</script>
	</head>
	<body>
		<div id="map"></div>
		<script type="module">
			import {GridLayer, Map, LatLng} from 'leaflet';

			const tiles = new GridLayer();

			tiles.createTile = function (coords) {
				const tile = document.createElement('canvas'),
				      ctx = tile.getContext('2d');

				tile.width = tile.height = 256;

				ctx.fillStyle = 'white';
				ctx.fillRect(0, 0, 255, 255);

				ctx.fillStyle = 'black';
				ctx.fillText(`x: ${coords.x}, y: ${coords.y}, zoom: ${coords.z}`, 20, 20);

				ctx.strokeStyle = 'red';
				ctx.beginPath();
				ctx.moveTo(0, 0);
				ctx.lineTo(255, 0);
				ctx.lineTo(255, 255);
				ctx.lineTo(0, 255);
				ctx.closePath();
				ctx.stroke();

				return tile;
			};

			new Map('map', {center: new LatLng(50.5, 30.51), zoom: 15, layers: [tiles]});
		</script>
	</body>
</html>