Leaflet

A Modern, Lightweight Open-Source JavaScript Library for Interactive Maps by CloudMade

Utility

DOM utility

Mixins

Events

Interfaces

Event objects

L.Map

The central class of the API — it is used to create a map on a page and manipulate it.

Usage example

// initialize the map on the "map" div with a given center and zoom 
var map = new L.Map('map', {
	center: new L.LatLng(51.505, -0.09), 
	zoom: 13
});

// create a CloudMade tile layer
var cloudmadeUrl = 'http://{s}.tile.cloudmade.com/YOUR-API-KEY/997/256/{z}/{x}/{y}.png',
	cloudmade = new L.TileLayer(cloudmadeUrl, {maxZoom: 18});

// add the CloudMade layer to the map
map.addLayer(cloudmade);

Constructor

Constructor	Description
`L.Map( <HTMLElement\|String> id, <Map options> options? )`	Instantiates a map object given a div element (or its id) and optionally an object literal with map options described below.

Options

Option	Type	Default value	Description
`center`	`LatLng`	`null`	Initial geographical center of the map.
`zoom`	`Number`	`null`	Initial map zoom.
`layers`	`ILayer[]`	`[]`	Layers that will be added to the map initially.
`dragging`	`Boolean`	`true`	Whether the map be draggable with mouse/touch or not.
`touchZoom`	`Boolean`	`true`	Whether the map can be zoomed by touch-dragging with two fingers.
`scrollWheelZoom`	`Boolean`	`true`	Whether the map can be zoomed by using the mouse wheel.
`doubleClickZoom`	`Boolean`	`true`	Whether the map can be zoomed in by double clicking on it.
`zoomControl`	`Boolean`	`true`	Whether the zoom control is added to the map by default.
`trackResize`	`Boolean`	`true`	Whether the map automatically handles browser window resize to update itself.

Interaction handlers

Interaction handlers are properties of a map instance that allow you to control interaction behavior in runtime, enabling or disabling certain features such as dragging or touch zoom (see IHandler methods). Example:

map.doubleClickZoom.disable();

Property	Type	Description
dragging	IHandler	Map dragging handler (by both mouse and touch).
touchZoom	IHandler	Touch zoom handler.
doubleClickZoom	IHandler	Double click zoom handler.
scrollWheelZoom	IHandler	Scroll wheel zoom handler.
shiftDragZoom	IHandler	Shift-drag zoom handler.

Methods that modify map state

Method	Returns	Description
`setView( <LatLng> center, <Number> zoom, <Boolean> forceReset? )`	`this`	Sets the view of the map (geographical center and zoom). If `forceReset` is set to `true`, the map is reloaded even if it's eligible for pan or zoom animation (`false` by default).
`setZoom( <Number> zoom )`	`this`	Sets the zoom of the map.
`zoomIn()`	`this`	Increases the zoom of the map by 1.
`zoomOut()`	`this`	Decreases the zoom of the map by 1.
`fitBounds( <LatLngBounds> bounds )`	`this`	Sets a map view that contains the given geographical bounds with the maximum zoom level possible.
`panTo( <LatLng> latlng )`	`this`	Pans the map to a given center. Makes an animated pan if new center is not more than one screen away from the current one.
`panBy( <Point> point )`	`this`	Pans the map by a given number of pixels (animated).
`invalidateSize()`	`this`	Checks if the map container size changed and updates the map if so — call it after you've changed the map size dynamically.
`locate( <Boolean> noAutoFitBounds? )`	`this`	Tries to locate the user using Geolocation API and zooms the map if successful, firing `locationfound` (with location data) or `locationerror` event. Set `noAutoFitBounds` to `true` if you don't want the map view to be set automatically (`false` by default).

Methods that get map state

Method	Returns	Description
`getCenter()`	`LatLng`	Returns the geographical center of the map view.
`getZoom()`	`Number`	Returns the current zoom of the map view.
`getMinZoom()`	`Number`	Returns the minimum zoom level of the map.
`getMaxZoom()`	`Number`	Returns the maximum zoom level of the map.
`getBoundsZoom( <LatLngBounds> bounds )`	`Number`	Returns the maximum zoom level on which the given bounds fit to the map view in its entirety.
`getSize()`	`Point`	Returns the current size of the map container.
`getPixelBounds()`	`Bounds`	Returns the bounds of the current map view in projected pixel coordinates (sometimes useful in layer and overlay implementations).
`getPixelOrigin()`	`Point`	Returns the projected pixel coordinates of the top left point of the map layer (useful in custom layer and overlay implementations).
`getPanes()`	`Panes`	Returns an object for accessing different panes of the map (tile pane, marker pane, etc.).

Methods for layers and controls

`addLayer( <ILayer> layer )`	`this`	Adds the given layer to the map.
`removeLayer( <ILayer> layer )`	`this`	Removes the given layer from the map.
`openPopup( <Popup> popup )`	`this`	Opens the specified popup while closing the previously opened (to make sure only one is opened at one time for usability).
`closePopup()`	`this`	Closes the popup opened with openPopup.
`addControl( <IControl> control )`	`this`	Adds the given control to the map.
`removeControl( <IControl> control )`	`this`	Removes the given control from the map.

Conversion methods

Method	Returns	Description
`latLngToLayerPoint( <LatLng> latlng )`	`Point`	Returns the map layer point that corresponds to the given geographical coordinates (useful for placing overlays on the map).
`layerPointToLatLng( <Point> point )`	`LatLng`	Returns the geographical coordinates of a given map layer point.
`mouseEventToContainerPoint( <MouseEvent> event )`	`Point`	Returns the pixel coordinates of a mouse click (relative to the top left corner of the map) given its event object.
`mouseEventToLayerPoint( <MouseEvent> event )`	`Point`	Returns the pixel coordinates of a mouse click relative to the map layer given its event object.
`mouseEventToLatLng( <MouseEvent> event )`	`LatLng`	Returns the geographical coordinates of the point the mouse clicked on given the click's event object.
`containerPointToLayerPoint( <Point> point )`	`Point`	Converts the point relative to the map container to a point relative to the map layer.
`layerPointToContainerPoint( <Point> point )`	`Point`	Converts the point relative to the map layer to a point relative to the map container.
`project( <LatLng> latlng, <Number> zoom? )`	`Point`	Projects the given geographical coordinates to pixel coordinates for the given zoom level (current zoom level by default).
`unproject( <Point> point, <Number> zoom? )`	`LatLng`	Projects the given pixel coordinates to geographical coordinates for the given zoom level (current zoom level by default).

Other methods

Method	Returns	Description
`getContainer()`	`HTMLElement`	Returns the container element of the map.
`getPanes()`	`MapPanes`	Returns an object with different map panes (to render overlays in).

Map panes

An object literal that contains different map panes that you can use to put your custom overlays in. The difference is mostly in zIndex order that such overlays get.

Property	Type	Description
`mapPane`	`HTMLElement`	Pane that contains all other map panes.
`tilePane`	`HTMLElement`	Pane for tile layers.
`objectsPane`	`HTMLElement`	Pane that contains all the panes except tile pane.
`shadowPane`	`HTMLElement`	Pane for overlay shadows (e.g. marker shadows).
`overlayPane`	`HTMLElement`	Pane for overlays like polylines and polygons.
`markerPane`	`HTMLElement`	Pane for marker icons.
`popupPane`	`HTMLElement`	Pane for popups.

L.Marker

Used to put markers on the map.

Usage example

var marker = new L.Marker(latlng);
map.addLayer(marker);

Constructor

Constructor	Description
`L.Marker( <LatLng> latlng, <Marker options> options? )`	Instantiates a Marker object given a geographical point and optionally an options object.

Options

Option	Type	Default value	Description
`icon`	Class (`L.Icon` or its child)	`L.Icon`	Icon class to use for rendering the marker. See Icon documentation for details on how to customize the marker icon.
`clickable`	Boolean	`true`	If false, the marker will not emit mouse events and will act as a part of the underlying map.
`draggable`	Boolean	`false`	Whether the marker is draggable with mouse/touch or not.

Methods

Method	Returns	Description
`getLatLng()`	`LatLng`	Returns the current geographical position of the marker.
`bindPopup( <String> htmlContent, <Popup options> options? )`	`this`	Binds a popup with a particular HTML content to a click on this marker. You can also open the bound popup with the Marker openPopup method.
`openPopup()`	`this`	Opens the popup previously bound by the bindPopup method.

Interaction handlers

Interaction handlers are properties of a marker instance that allow you to control interaction behavior in runtime, enabling or disabling certain features such as dragging (see IHandler methods). Example:

marker.dragging.disable();

Property	Type	Description
dragging	IHandler	Marker dragging handler (by both mouse and touch).

Used to open popups in certain places of the map. Use Map#openPopup to open popups while making sure that only one popup is open at one time (recommended for usability), or use Map#addLayer to open as many as you want.

Usage example

If you want to just bind a popup to marker click and then open it, it's really easy:

marker.bindPopup(popupContent).openPopup();

Path overlays like polylines also have a bindPopup method. Here's a more complicated way to open a popup on a map:

var popupContent = '<p>Hello world!<br />This is a nice popup.</p>', 
	popup = new L.Popup();

popup.setLatLng(latlng);
popup.setContent(popupContent);

map.openPopup(popup);

Constructor

Constructor	Description
`L.Popup( <Popup options> options? )`	Instantiates a Popup object given the geographical point where it will open, the HTML content it will have and optionally an options object.

Option	Type	Default value	Description
`maxWidth`	`Number`	`300`	Max width of the popup.
`autoPan`	`Boolean`	`true`	Set it to false if you don't want the map to do panning animation to fit the opened popup.'
`closeButton`	`Boolean`	`true`	Controls the presense of a close button in the popup.
`closeMapOnClick`	`Boolean`	`true`	Set it to false if you don't want the popup to close when user clicks the map.
`offset`	`Point`	`Point(0, 0)`	The offset of the popup position. Useful to control the anchor of the popup when opening it on some overlays.

Methods

Method	Returns	Description
`setLatLng( <LatLng> latlng )`	`this`	Sets the geographical point where the popup will open.
`setContent( <String> htmlContent )`	`this`	Sets the HTML content of the popup.

L.TileLayer

Used to load and display tile layers on the map, implements ILayer interface.

Usage example

var cloudmadeUrl = 'http://{s}.tile.cloudmade.com/YOUR-API-KEY/997/256/{z}/{x}/{y}.png',
	cloudmade = new L.TileLayer(cloudmadeUrl, {maxZoom: 18});

Constructor

Constructor	Description
`L.TileLayer( <String> urlTemplate, <TileLayer options> options? )`	Instantiates a tile layer object given a URL template and optionally an options object.

URL template

A string of the following form:

'http://{s}.somedomain.com/blabla/{z}/{x}/{y}.png'

{s} means one of the randomly chosen subdomains (their range is specified in options; a, b or c by default, can be omitted), {z} — zoom level, {x} and {y} — tile coordinates.

Options

Option	Type	Default value	Description
`minZoom`	`Number`	`0`	Minimum zoom number.
`maxZoom`	`Number`	`18`	Maximum zoom number.
`tileSize`	`Number`	`256`	Tile size (width and height in pixels, assuming tiles are square).
`subdomains`	`String` or `String[]`	`'abc'`	Subdomains of the tile service. Can be passed in the form of one string (where each letter is a subdomain name) or an array of strings.
`errorTileUrl`	`String`	`''`	URL to the tile image to show in place of the tile that failed to load.
`attribution`	`String`	`''`	e.g. "© CloudMade" — the string used by the attribution control, describes the layer data.
`unloadInvisibleTiles`	`Boolean`	depends	If `true`, all the tiles that are not visible after panning are removed (for better performance). `true` by default on mobile WebKit, otherwise `false`.
`updateWhenIdle`	`Boolean`	depends	If `false`, new tiles are loaded during panning, otherwise only after it (for better performance). `true` by default on mobile WebKit, otherwise `false`.

L.ImageOverlay

Used to load and display a single image over specific bounds of the map, implements ILayer interface.

Usage example

var imageBounds = new L.LatLngBounds(
		new L.LatLng(40.712216,-74.22655),
		new L.LatLng(40.773941,-74.12544));
		
var image = new L.ImageOverlay(
		"http://www.lib.utexas.edu/maps/historical/newark_nj_1922.jpg", imageBounds);

Constructor

Constructor	Description
`L.ImageOverlay( <String> imageUrl, <LatLngBounds> bounds )`	Instantiates an image overlay object given the URL of the image and the geographical bounds it is tied to.

L.Path

An abstract class that contains options and constants shared between vector overlays (Polygon, Polyline, Circle). Do not use it directly.

Options

Option	Type	Default value	Description
`stroke`	`Boolean`	`true`	Whether to draw stroke along the path. Set it to `false` to disable borders on polygons or circles.
`color`	`String`	`'#03f'`	Stroke color.
`weight`	`Number`	`5`	Stroke width in pixels.
`opacity`	`Number`	`0.5`	Stroke opacity.
`fill`	`Boolean`	depends	Whether to fill the path with color. Set it to `false` to disable filling on polygons or circles.
`fillColor`	`String`	same as color	Fill color.
`fillOpacity`	`Number`	0.2	Fill opacity.

Constants

Constant	Type	Value	Description
`L.Path.SVG`	`Boolean`	depends	True if SVG is used for vector rendering (true for most modern browsers).
`L.Path.VML`	`Boolean`	depends	True if VML is used for vector rendering (IE 6-8).
`L.Path.CLIP_PADDING`	`Number`	0.5 for SVG 0.02 for VML	How much to extend the clip area around the map view (relative to its size, e.g. 0.5 is half the screen in each direction). Smaller values mean that you will see clipped ends of paths while you're dragging the map, and bigger values decrease drawing performance.

L.Polyline

A class for drawing polyline overlays on a map. Extends Path. Use Map#addLayer to add it to the map.

Usage example

// create a red polyline from an arrays of LatLng points
var polyline = new L.Polyline(latlngs, {color: 'red'});

// zoom the map to the polyline
map.fitBounds(new L.LatLngBounds(latlngs));

// add the polyline to the map
map.addLayer(polyline);

Constructor

Constructor	Description
`L.Polyline( <LatLng[]> latlngs, <Polyline options> options? )`	Instantiates a polyline object given an array of geographical points and optionally an options object.

Options

You can use Path options and additionally the following options:

Option	Type	Default value	Description
`smoothFactor`	`Number`	`1.0`	How much to simplify the polyline on each zoom level. More means better performance and smoother look, and less means more accurate representation.
`noClip`	`Boolean`	`false`	Disabled polyline clipping.

L.Polygon

A class for drawing polygon overlays on a map. Extends Polyline. Use Map#addLayer to add it to the map.

Constructor

Constructor	Description
`L.Polygon( <LatLng[]> latlngs, <Polyline options> options? )`	Instantiates a polygon object given an array of geographical points and optionally an options object (the same as for Polyline).

L.Circle

A class for drawing circle overlays on a map. Extends Path. Use Map#addLayer to add it to the map.

Constructor

Constructor	Description
`L.Circle( <LatLng> latlng, <Number> radius, <Path options> options? )`	Instantiates a polygon object given an geographical point, a radius in pixels and optionally an options object.

L.LatLng

Represents a geographical point with a certain latitude and longitude.

var latlng = new L.LatLng(50.5, 30.5);

Constructor

Constructor	Description
`L.LatLng( <Number> latitude, <Number> longitude, <Boolean> noWrap? )`	Creates a LatLng object with the given latitude and longitude. Wraps longitude to lie between -180 and 180 and clamps longitude between -90 and 90 by default — you can disable this with the noWrap argument.

Properties

Property	Type	Description
`lat`	`Number`	Latitude in degrees.
`lng`	`Number`	Longitude in degrees.

Methods

Method	Returns	Description
`equals( <LatLng> otherLatlng )`	`Boolean`	Returns true if the given LatLng point is at the same position (within a small margin of error).
`toString()`	`String`	Returns a string representation of the point (for debugging purposes).

Constants

Constant	Type	Value	Description
`DEG_TO_RAD`	`Number`	`Math.PI / 180`	A multiplier for converting degrees into radians.
`RAD_TO_DEG`	`Number`	`180 / Math.PI`	A multiplier for converting radians into degrees.
`MAX_MARGIN`	`Number`	`1.0E-9`	Max margin of error for the equality check.

L.LatLngBounds

Represents a rectangular geographical area on a map.

var southWest = new L.LatLng(40.712,-74.227),
	northEast = new L.LatLng(40.774,-74.125),
	bounds = new L.LatLngBounds(southWest, northEast);

Constructor

Constructor	Description
`L.LatLngBounds( <LatLng> southWest, <LatLng> northEast )`	Creates a LatLngBounds object by defining south-west and north-east corners of the rectangle.
`L.LatLngBounds( <LatLng[]> latlngs )`	Creates a LatLngBounds object defined by the geographical points it contains. Very useful for zooming the map to fit a particular set of locations with fitBounds.

Methods

Method	Returns	Description
`extend( <LatLng> latlng )`	-	Extends the bounds to contain the given LatLng point.
`getSouthWest()`	`LatLng`	Returns the south-west point of the bounds.
`getNorthEast()`	`LatLng`	Returns the north-east point of the bounds.
`getNorthWest()`	`LatLng`	Returns the north-west point of the bounds.
`getSouthEast()`	`LatLng`	Returns the south-east point of the bounds.
`getCenter()`	`LatLng`	Returns the center point of the bounds.
`contains( <LatLngBounds> otherBounds )`	`Boolean`	Returns `true` if the rectangle contains the given one.

L.Point

Represents a point with x and y coordinates in pixels.

Constructor

Constructor	Description
`L.Point( <Number> x, <Number> y )`	Creates a Point object with the given x and y coordinates.

Properties

Property	Type	Description
`x`	`Number`	The x coordinate.
`y`	`Number`	The y coordinate.

Methods

Method	Returns	Description
`add( <Point> otherPoint )`	`Point`	Returns the result of addition of the current and the given points.
`subtract( <Point> otherPoint )`	`Point`	Returns the result of subtraction of the given point from the current.
`multiplyBy( <Number> number )`	`Point`	Returns the result of multiplication of the current point by the given number.
`divideBy( <Number> number )`	`Point`	Returns the result of division of the current point by the given number.
`distanceTo( <Point> otherPoint )`	`Number`	Returns the distance between the current and the given points.
`clone()`	`Point`	Returns a copy of the current point.
`round()`	`Point`	Returns a copy of the current point with rounded coordinates.
`toString()`	`String`	Returns a string representation of the point for debugging purposes.

L.Bounds

Represents a rectangular area in pixel coordinates.

var p1 = new L.Point(10, 10),
	p2 = new L.Point(40, 60),
	bounds = new L.Bounds(p1, p2);

Constructor

Constructor	Description
`L.Bounds( <Point> topLeft, <Point> bottomRight )`	Creates a Bounds object by defining top-left and bottom-right coordinates of the rectangle.
`L.LatLngBounds( <Point[]>points )`	Creates a Bounds object defined by the points it contains.

Properties

Property	Type	Description
`min`	`Point`	The top left corner of the rectangle.
`max`	`Point`	The bottom right corner of the rectangle.

Methods

Method	Returns	Description
`extend( <Point> point )`	-	Extends the bounds to contain the given point.
`getCenter()`	`Point`	Returns the center point of the bounds.
`contains( <Bounds> otherBounds )`	`Boolean`	Returns `true` if the rectangle contains the given one.

L.Control.Zoom

A basic zoom control with two buttons (zoom in and zoom out). It is put on the map by default unless you set its zoomControl option to false. Implements IControl interface.

Constructor

Constructor	Description
`L.Control.Zoom()`	Creates a zoom control.

IHandler

An interface implemented by interaction handlers.

Method	Returns	Description
`enable()`	-	Enables the handler.
`disable()`	-	Disables the handler.
`enabled()`	`Boolean`	Returns true if the handler is enabled.

Leaflet

A Modern, Lightweight Open-Source JavaScript Library for Interactive Maps by CloudMade

Map

Map methods

UI layers

Raster layers

Vector layers

Basic types

Controls

Utility

DOM utility

Mixins

Interfaces

Event objects

L.Map

Usage example

Constructor

Options

Interaction handlers

Methods that modify map state

Methods that get map state

Methods for layers and controls

Conversion methods

Other methods

Map panes

L.Marker

Usage example

Constructor

Options

Methods

Interaction handlers

L.Popup

Usage example

Constructor

Options

Methods

L.TileLayer

Usage example

Constructor

URL template

Options

L.ImageOverlay

Usage example

Constructor

L.Path

Options

Constants

L.Polyline

Usage example

Constructor

Options

L.Polygon

Constructor

L.Circle

Constructor

L.LatLng

Constructor

Properties

Methods

Constants

L.LatLngBounds

Constructor

Methods

L.Point

Constructor

Properties

Methods

L.Bounds

Constructor

Properties

Methods

L.Control.Zoom

Constructor

IHandler