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Data-driven styling

FeatureLayerinterface

google.maps.FeatureLayerinterface

An interface representing a map layer containing features of a specificFeatureType whose style can be overridden client-side, or have events attached.

Properties

featureType
TheFeatureType associated with thisFeatureLayer.
isAvailable
Type: boolean
Whether thisFeatureLayer is available, meaning whether Data-driven styling is available for this map (there is a map ID using vector tiles with thisFeatureLayer enabled in the Google Cloud Console map style.) If this is false (or becomes false), styling on thisFeatureLayer returns to default and events are not triggered.
BetadatasetIdoptional

Notice: Available only in thev=beta channel.

Type: stringoptional
The Dataset ID for thisFeatureLayer. Only present if thefeatureType isFeatureType.DATASET.
styleoptional
The style ofFeatures in theFeatureLayer. The style is applied when style is set. If your style function updates, you must set the style property again. AFeatureStyleFunction must return consistent results when it is applied over the map tiles, and should be optimized for performance. Asynchronous functions are not supported. If you use aFeatureStyleOptions, all features of that layer will be styled with the sameFeatureStyleOptions. Set the style tonull to remove the previously set style. If thisFeatureLayer is not available, setting style does nothing and logs an error.

Methods

addListener
addListener(eventName, handler)
Parameters: 
  • eventName: string Observed event.
  • handler: Function Function to handle events.
Return Value: MapsEventListener Resulting event listener.
Adds the given listener function to the given event name. Returns an identifier for this listener that can be used withevent.removeListener.

Events

click
function(event)
Arguments: 
This event is fired when theFeatureLayer is clicked.
mousemove
function(event)
Arguments: 
This event is fired when the user's mouse moves over theFeatureLayer.

FeatureTypeconstants

google.maps.FeatureTypeconstants

Identifiers for feature types.

Access by callingconst {FeatureType} = await google.maps.importLibrary("maps").
SeeLibraries in the Maps JavaScript API.

Constants

ADMINISTRATIVE_AREA_LEVEL_1Indicates a first-order civil entity below the country level.
ADMINISTRATIVE_AREA_LEVEL_2Indicates a second-order civil entity below the country level.
COUNTRYIndicates the national political entity.
BetaDATASET

Notice: Available only in thev=beta channel.

Indicates a third-party dataset.
LOCALITYIndicates an incorporated city or town political entity.
POSTAL_CODEIndicates a postal code as used to address postal mail within the country. Includes zip codes.
SCHOOL_DISTRICTIndicates a school district.

FeatureStyleFunctiontypedef

google.maps.FeatureStyleFunctiontypedef

A function to style aFeatureLayer.

function(FeatureStyleFunctionOptions): (FeatureStyleOptionsoptional)

FeatureStyleFunctionOptionsinterface

google.maps.FeatureStyleFunctionOptionsinterface

Options passed to aFeatureStyleFunction.

Properties

feature
Type: Feature
Feature passed into theFeatureStyleFunction for styling.

FeatureStyleOptionsinterface

google.maps.FeatureStyleOptionsinterface

These options specify the way the style of aFeature should be modified on a map.

Properties

fillColoroptional
Type: stringoptional
Hex RGB string (like "#00FF00" for green). Only applies to polygon geometries.
fillOpacityoptional
Type: numberoptional
The fill opacity between 0.0 and 1.0. Only applies to polygon geometries.
strokeColoroptional
Type: stringoptional
Hex RGB string (like "#00FF00" for green).
strokeOpacityoptional
Type: numberoptional
The stroke opacity between 0.0 and 1.0. Only applies to line and polygon geometries.
strokeWeightoptional
Type: numberoptional
The stroke width in pixels. Only applies to line and polygon geometries.

Featureinterface

google.maps.Featureinterface

An interface representing a vector map tile feature. These are inputs to theFeatureStyleFunction. Do not save a reference to a particularFeature object because the reference will not be stable.

Properties

featureType
FeatureType of thisFeature.

PlaceFeatureinterface

google.maps.PlaceFeatureinterface

An interface representing a feature with a place ID which includes features of typeFeatureType.ADMINISTRATIVE_AREA_LEVEL_1,FeatureType.ADMINISTRATIVE_AREA_LEVEL_2,FeatureType.COUNTRY,FeatureType.LOCALITY,FeatureType.POSTAL_CODE, andFeatureType.SCHOOL_DISTRICT.

This interface extendsFeature.

Properties

placeId
Type: string
Inherited:featureType

Methods

fetchPlace
fetchPlace()
Parameters:  None
Return Value: Promise<Place>
Fetches aPlace for thisPlaceFeature. In the resultingPlace object, theid and thedisplayName properties will be populated. The display name will be in the language the end user sees on the map. (Additional fields can be subsequently requested viaPlace.fetchFields() subject to normal Places API enablement and billing.) Do not call this from aFeatureStyleFunction since only synchronous FeatureStyleFunctions are supported. The promise is rejected if there was an error fetching thePlace.

DatasetFeatureinterface

google.maps.DatasetFeatureinterface

Notice: Available only in thev=beta channel.

An interface representing a feature from a Dataset. ThefeatureType of aDatasetFeature will always beFeatureType.DATASET.

This interface extendsFeature.

Properties

datasetAttributes
Type: Object<string, string>
Key-value mapping of the feature's attributes.
datasetId
Type: string
Dataset id of the dataset that this feature belongs to.
Inherited:featureType

FeatureMouseEventinterface

google.maps.FeatureMouseEventinterface

This object is returned from a mouse event on aFeatureLayer.

This interface extendsMapMouseEvent.

Properties

features
Type: Array<Feature>
TheFeatures at this mouse event.
Inherited:domEvent,latLng

Methods

Inherited:stop

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Last updated 2025-11-21 UTC.