### Layer Management Example
Source: https://leafletjs.com/reference.html
Demonstrates basic layer lifecycle operations including creation, adding to a map, and removal.
```javascript
var layer = L.marker(latlng).addTo(map);
layer.addTo(map);
layer.remove();
```
--------------------------------
### Setup Leaflet Map and TileLayer
Source: https://leafletjs.com/examples/overlays
Standard initialization for a Leaflet map with an OpenStreetMap tile layer.
```javascript
var map = L.map('map').setView([37.8, -96], 4);
var osm = L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
maxZoom: 19,
attribution: '© OpenStreetMap'
}).addTo(map);
```
--------------------------------
### Configure and Add ImageOverlay
Source: https://leafletjs.com/examples/overlays
Example of adding an image overlay with specific options like opacity, error handling, and interactivity.
```javascript
var imageUrl = 'https://maps.lib.utexas.edu/maps/historical/newark_nj_1922.jpg';
var errorOverlayUrl = 'https://cdn-icons-png.flaticon.com/512/110/110686.png';
var altText = 'Image of Newark, N.J. in 1922. Source: The University of Texas at Austin, UT Libraries Map Collection.';
var latLngBounds = L.latLngBounds([[40.799311, -74.118464], [40.68202047785919, -74.33]]);
var imageOverlay = L.imageOverlay(imageUrl, latLngBounds, {
opacity: 0.8,
errorOverlayUrl: errorOverlayUrl,
alt: altText,
interactive: true
}).addTo(map);
```
--------------------------------
### PosAnimation usage example
Source: https://leafletjs.com/reference.html
This example demonstrates using `L.PosAnimation` to animate an element's position, first with a quick move and then a smoother transition with a specified scale. It utilizes event listeners for animation completion.
```javascript
var myPositionMarker = L.marker([48.864716, 2.294694]).addTo(map);
myPositionMarker.on("click", function() {
var pos = map.latLngToLayerPoint(myPositionMarker.getLatLng());
pos.y -= 25;
var fx = new L.PosAnimation();
fx.once('end',function() {
pos.y += 25;
fx.run(myPositionMarker._icon, pos, 0.8);
});
fx.run(myPositionMarker._icon, pos, 0.3);
});
```
--------------------------------
### TileLayer URL Template Example
Source: https://leafletjs.com/reference.html
Demonstrates a URL template for tile layers, including subdomain cycling ({s}), zoom level ({z}), and tile coordinates ({x}, {y}).
```javascript
'https://{s}.somedomain.com/blabla/{z}/{x}/{y}{r}.png'
```
--------------------------------
### Build Leaflet from Source
Source: https://leafletjs.com/download.html
Commands to install dependencies and compile the Leaflet source code into the dist folder.
```bash
npm install
```
```bash
npm run build
```
--------------------------------
### Create a Multi-line Polyline
Source: https://leafletjs.com/reference.html
This example shows how to create a polyline with multiple separate lines by passing a multi-dimensional array of LatLng points.
```javascript
// create a red polyline from an array of arrays of LatLng points
var latlngs = [
[[45.51, -122.68],
[37.77, -122.43],
[34.04, -118.2]],
[[40.78, -73.91],
[41.83, -87.62],
[32.76, -96.72]]
];
```
--------------------------------
### Create and Add SVGOverlay
Source: https://leafletjs.com/reference.html
This example demonstrates how to create an SVG element, define its content and viewBox, set its geographical bounds, and add it to the map using L.svgOverlay. Ensure the SVG element has a viewBox attribute for proper scaling.
```javascript
var svgElement = document.createElementNS("http://www.w3.org/2000/svg", "svg");
svgElement.setAttribute('xmlns', "http://www.w3.org/2000/svg");
svgElement.setAttribute('viewBox', "0 0 200 200");
svgElement.innerHTML = '';
var svgElementBounds = [ [ 32, -130 ], [ 13, -100 ] ];
L.svgOverlay(svgElement, svgElementBounds).addTo(map);
```
--------------------------------
### Initialize Leaflet Map and Add WMS Layer
Source: https://leafletjs.com/examples/wms/wms.html
Basic setup for a Leaflet map and adding a WMS layer. Requires a map container and WMS options.
```javascript
var map = L.map(mapDiv, mapOptions);
var wmsLayer = L.tileLayer.wms('http://ows.mundialis.de/services/service?', wmsOptions).addTo(map);
```
--------------------------------
### Install Leaflet via npm
Source: https://leafletjs.com/download.html
Use the npm package manager to fetch the Leaflet library and its dependencies locally.
```bash
npm install leaflet
```
--------------------------------
### Add Markers and Polyline with [x, y] Coordinates
Source: https://leafletjs.com/examples/crs-simple/crs-simple.html
This example uses the `xy` wrapper function to define star locations and then adds markers and a polyline to the map using these coordinates. Ensure the `map` object is already initialized.
```javascript
var sol = xy(175.2, 145.0);
var mizar = xy( 41.6, 130.1);
var kruegerZ = xy( 13.4, 56.5);
var deneb = xy(218.7, 8.3);
L.marker( sol).addTo(map).bindPopup( 'Sol');
L.marker( mizar).addTo(map).bindPopup( 'Mizar');
L.marker(kruegerZ).addTo(map).bindPopup('Krueger-Z');
L.marker( deneb).addTo(map).bindPopup( 'Deneb');
var travel = L.polyline([sol, deneb]).addTo(map);
```
--------------------------------
### Enable Draggable
Source: https://leafletjs.com/reference.html
Example usage for making a DOM element draggable. This involves creating a Draggable instance and then enabling it.
```javascript
var draggable = new L.Draggable(elementToDrag);
draggable.enable();
```
--------------------------------
### Handle Asynchronous Tile Initialization in GridLayer
Source: https://leafletjs.com/examples/extending/extending-2-layers.html
Implement the `createTile` function to handle asynchronous tile loading by using the `done` callback. Call `done(null, tile)` when the tile is ready or `done(error)` on failure. This example artificially delays tile readiness.
```javascript
createTile: function (coords, done) {
var tile = document.createElement('div');
tile.innerHTML = [coords.x, coords.y, coords.z].join(', ');
tile.style.outline = '1px solid red';
setTimeout(function () {
done(null, tile); // Syntax is 'done(error, tile)'
}, 500 + Math.random() * 1500);
return tile;
}
```
--------------------------------
### Include and Initialize a Plugin
Source: https://leafletjs.com/examples/extending/extending-2-layers.html
Demonstrates how to include the plugin script in an HTML file and initialize the custom layer on a map.
```html
…
…
```
--------------------------------
### Get Tooltip Object
Source: https://leafletjs.com/reference.html
Returns the Tooltip object bound to this layer.
```javascript
getTooltip()
```
--------------------------------
### Initialize and configure a FeatureGroup
Source: https://leafletjs.com/reference.html
Demonstrates creating a FeatureGroup with multiple layers, binding a popup, and attaching an event listener.
```javascript
L.featureGroup([marker1, marker2, polyline])
.bindPopup('Hello world!')
.on('click', function() { alert('Clicked on a member of the group!'); })
.addTo(map);
```
--------------------------------
### Get element position
Source: https://leafletjs.com/reference.html
Use `getPosition` to retrieve the coordinates of an element that was previously positioned using `L.DomUtil.setPosition`.
```javascript
var currentPosition = L.DomUtil.getPosition(element);
```
--------------------------------
### Get an element's class
Source: https://leafletjs.com/reference.html
Use `getClass` to retrieve the current class attribute string of an element.
```javascript
var currentClasses = L.DomUtil.getClass(element);
```
--------------------------------
### VideoOverlay Creation and Usage
Source: https://leafletjs.com/reference.html
Demonstrates how to create and use the VideoOverlay class to display video content over map bounds.
```APIDOC
## VideoOverlay
### Description
Used to load and display a video player over specific bounds of the map. Extends `ImageOverlay`. A video overlay uses the `