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README.md

Leaflet.ActiveLayers

It is a plugin for the Leaflet library. This plugin adds new L.Control.ActiveLayers with functionality to get currently active layers on the map.

Supports Leaflet 0.7.x and 1.0+.

Install

Bower

bower install leaflet.activelayers

Example usage

var attribution = '&copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>'

mapnikLayer = L.tileLayer(
    'http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
    {attribution: attribution}
)
var blackAndWhite = L.tileLayer(
    'http://{s}.www.toolserver.org/tiles/bw-mapnik/{z}/{x}/{y}.png',
    {attribution: attribution}
)
var clouds = L.tileLayer('http://{s}.tile.openweathermap.org/map/clouds/{z}/{x}/{y}.png', {
    attribution: 'Map data &copy; <a href="http://openweathermap.org">OpenWeatherMap</a>',
    opacity: 0.5
})

map = L.map('map', {
    center: new L.LatLng(39.73, -104.99),
    zoom: 10,
    layers: [mapnikLayer, clouds]
})

var baseLayers = {
    'Mapnik': mapnikLayer,
    'Black and Whilte': blackAndWhite
}
var overlayLayers = {
    'Clouds': clouds
}

var control = L.control.activeLayers(baseLayers, overlayLayers)
control.addTo(map)

// 'Mapnik'
console.log(control.getActiveBaseLayer().name)

//Clouds
var overlayLayers = control.getActiveOverlayLayers()
for (var overlayId in overlayLayers) {
    console.log(overlayLayers[overlayId].name)
}

API

get active base layer

control.getActiveBaseLayer()

return object LL:

{
    name: 'layer name on the control',
    layer: L.TileLayer,
    overlay: is overlay layer
}

get active overlay layers

control.getActiveOverlayLayers()

return object:

{layerId: LL}

where LL is the object defined in the previous method and layerId is L.stamp(LL.layer)

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