GeolocateControl

A GeolocateControl control provides a button that uses the browser's geolocation API to locate the user on the map.

Not all browsers support geolocation, and some users may disable the feature. Geolocation support for modern browsers including Chrome requires sites to be served over HTTPS. If geolocation support is not available, the GeolocateControl will show as disabled.

The zoom level applied will depend on the accuracy of the geolocation provided by the device.

The GeolocateControl has two modes. If trackUserLocation is false (default) the control acts as a button, which when pressed will set the map's camera to target the user location. If the user moves, the map won't update. This is most suited for the desktop. If trackUserLocation is true the control acts as a toggle button that when active the user's location is actively monitored for changes. In this mode the GeolocateControl has three interaction states: * active - the map's camera automatically updates as the user's location changes, keeping the location dot in the center. Initial state and upon clicking the GeolocateControl button. * passive - the user's location dot automatically updates, but the map's camera does not. Occurs upon the user initiating a map movement. * disabled - occurs if Geolocation is not available, disabled or denied.

These interaction states can't be controlled programmatically, rather they are set based on user interactions.

Example

map.addControl(new GeolocateControl({
    positionOptions: {
        enableHighAccuracy: true
    },
    trackUserLocation: true
}));

See

Locate the user

Events

Event trackuserlocationend of type Event will be fired when the GeolocateControl changes to the background state, which happens when a user changes the camera during an active position lock. This only applies when trackUserLocation is true. In the background state, the dot on the map will update with location updates but the camera will not.

Event trackuserlocationstart of type Event will be fired when the GeolocateControl changes to the active lock state, which happens either upon first obtaining a successful Geolocation API position for the user (a geolocate event will follow), or the user clicks the geolocate button when in the background state which uses the last known position to recenter the map and enter active lock state (no geolocate event will follow unless the users's location changes).

Event geolocate of type Event will be fired on each Geolocation API position update which returned as success. data - The returned Position object from the callback in Geolocation.getCurrentPosition() or Geolocation.watchPosition().

Event error of type Event will be fired on each Geolocation API position update which returned as an error. data - The returned PositionError object from the callback in Geolocation.getCurrentPosition() or Geolocation.watchPosition().

Event outofmaxbounds of type Event will be fired on each Geolocation API position update which returned as success but user position is out of map maxBounds. data - The returned Position object from the callback in Geolocation.getCurrentPosition() or Geolocation.watchPosition().

Example

// Initialize the geolocate control.
let geolocate = new GeolocateControl({
  positionOptions: {
      enableHighAccuracy: true
  },
  trackUserLocation: true
});
// Add the control to the map.
map.addControl(geolocate);
// Set an event listener that fires
// when a trackuserlocationend event occurs.
geolocate.on('trackuserlocationend', () => {
  console.log('A trackuserlocationend event has occurred.')
});

Example

// Initialize the geolocate control.
let geolocate = new GeolocateControl({
  positionOptions: {
      enableHighAccuracy: true
  },
  trackUserLocation: true
});
// Add the control to the map.
map.addControl(geolocate);
// Set an event listener that fires
// when a trackuserlocationstart event occurs.
geolocate.on('trackuserlocationstart', () => {
  console.log('A trackuserlocationstart event has occurred.')
});

Example

// Initialize the geolocate control.
let geolocate = new GeolocateControl({
  positionOptions: {
      enableHighAccuracy: true
  },
  trackUserLocation: true
});
// Add the control to the map.
map.addControl(geolocate);
// Set an event listener that fires
// when a geolocate event occurs.
geolocate.on('geolocate', () => {
  console.log('A geolocate event has occurred.')
});

Example

// Initialize the geolocate control.
let geolocate = new GeolocateControl({
  positionOptions: {
      enableHighAccuracy: true
  },
  trackUserLocation: true
});
// Add the control to the map.
map.addControl(geolocate);
// Set an event listener that fires
// when an error event occurs.
geolocate.on('error', () => {
  console.log('An error event has occurred.')
});

Example

// Initialize the geolocate control.
let geolocate = new GeolocateControl({
  positionOptions: {
      enableHighAccuracy: true
  },
  trackUserLocation: true
});
// Add the control to the map.
map.addControl(geolocate);
// Set an event listener that fires
// when an outofmaxbounds event occurs.
geolocate.on('outofmaxbounds', () => {
  console.log('An outofmaxbounds event has occurred.')
});

Extends

Evented

Implements

IControl

Methods

_isOutOfMapMaxBounds()

_isOutOfMapMaxBounds(position: GeolocationPosition): boolean

Check if the Geolocation API Position is outside the map's maxBounds.

Parameters

Parameter	Type	Description
`position`	`GeolocationPosition`	the Geolocation API Position

Returns

boolean

true if position is outside the map's maxBounds, otherwise returns false.

Source

src/ui/control/geolocate_control.ts:270

_onSuccess()

_onSuccess(position: GeolocationPosition): void

When the Geolocation API returns a new location, update the GeolocateControl.

Parameters

Parameter	Type	Description
`position`	`GeolocationPosition`	the Geolocation API Position

Returns

void

Source

src/ui/control/geolocate_control.ts:315

_updateCamera()

_updateCamera(position: GeolocationPosition): void

Update the camera location to center on the current position

Parameters

Parameter	Type	Description
`position`	`GeolocationPosition`	the Geolocation API Position

Returns

void

Source

src/ui/control/geolocate_control.ts:382

_updateMarker()

_updateMarker(position?: GeolocationPosition): void

Update the user location dot Marker to the current position

Parameters

Parameter	Type	Description
`position`?	`GeolocationPosition`	the Geolocation API Position

Returns

void

Source

src/ui/control/geolocate_control.ts:399

listens()

listens(type: string): boolean

Returns a true if this instance of Evented or any forwardeed instances of Evented have a listener for the specified type.

Parameters

Parameter	Type	Description
`type`	`string`	The event type

Returns

boolean

true if there is at least one registered listener for specified event type, false otherwise

Inherited from

Evented.listens

Source

src/util/evented.ts:161

off()

off(type: string, listener: Listener): GeolocateControl

Removes a previously registered event listener.

Parameters

Parameter	Type	Description
`type`	`string`	The event type to remove listeners for.
`listener`	`Listener`	The listener function to remove.

on()

on(type: string, listener: Listener): this

Adds a listener to a specified event type.

Parameters

Parameter	Type	Description
`type`	`string`	The event type to add a listen for.
`listener`	`Listener`	The function to be called when the event is fired. The listener function is called with the data object passed to `fire`, extended with `target` and `type` properties.

Returns

this

Inherited from

Evented.on

Source

src/util/evented.ts:73

onAdd()

onAdd(map: Map): HTMLElement

Register a control on the map and give it a chance to register event listeners and resources. This method is called by Map#addControl internally.

Parameters

Parameter	Type	Description
`map`	`Map`	the Map this control will be added to

Returns

HTMLElement

The control's container element. This should be created by the control and returned by onAdd without being attached to the DOM: the map will insert the control's element into the DOM as necessary.

Implementation of

IControl.onAdd

Source

src/ui/control/geolocate_control.ts:234

onRemove()

onRemove(): void

Unregister a control on the map and give it a chance to detach event listeners and resources. This method is called by Map#removeControl internally.

Returns

void

Implementation of

IControl.onRemove

Source

src/ui/control/geolocate_control.ts:242

once()

once(type: string, listener?: Listener): Promise<any> | GeolocateControl

Adds a listener that will be called only once to a specified event type.

The listener will be called first time the event fires after the listener is registered.

Parameters

Parameter	Type	Description
`type`	`string`	The event type to listen for.
`listener`?	`Listener`	The function to be called when the event is fired the first time.

Returns

Promise<any> | GeolocateControl

this or a promise if a listener is not provided

Inherited from

Evented.once

Source

src/util/evented.ts:102

setEventedParent()

setEventedParent(parent?: Evented, data?: any): GeolocateControl

Bubble all events fired by this instance of Evented to this parent instance of Evented.

Parameters

Parameter	Type
`parent`?	`Evented`
`data`?	`any`

Returns

GeolocateControl

Inherited from

Evented.setEventedParent

Source

src/util/evented.ts:172

trigger()

trigger(): boolean

Programmatically request and move the map to the user's location.

Returns

boolean

false if called before control was added to a map, otherwise returns true.

Example

// Initialize the geolocate control.
let geolocate = new GeolocateControl({
 positionOptions: {
   enableHighAccuracy: true
 },
 trackUserLocation: true
});
// Add the control to the map.
map.addControl(geolocate);
map.on('load', () => {
  geolocate.trigger();
});

Source

src/ui/control/geolocate_control.ts:562