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Data-driven styling

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FeatureLayer interface

google.maps.FeatureLayer interface

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

Properties
`featureType`	Type: `FeatureType` The `FeatureType` associated with this `FeatureLayer`.
`isAvailable`	Type: `boolean` Whether this `FeatureLayer` is available, meaning whether Data-driven styling is available for this map (there is a map ID using vector tiles with this `FeatureLayer` enabled in the Google Cloud Console map style.) If this is false (or becomes false), styling on this `FeatureLayer` returns to default and events are not triggered.
`BetadatasetId optional`	Notice: Available only in the v=beta channel. Type: `string optional` The Dataset ID for this `FeatureLayer`. Only present if the `featureType` is `FeatureType.DATASET`.
`style optional`	Type: `FeatureStyleOptions\|FeatureStyleFunction optional` The style of `Feature`s in the `FeatureLayer`. The style is applied when style is set. If your style function updates, you must set the style property again. A `FeatureStyleFunction` 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 a `FeatureStyleOptions`, all features of that layer will be styled with the same `FeatureStyleOptions`. Set the style to `null` to remove the previously set style. If this `FeatureLayer` 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 with `event.removeListener` .

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

FeatureType constants

google.maps.FeatureType constants

Identifiers for feature types.

Access by calling const {FeatureType} = await google.maps.importLibrary("maps").
See Libraries in the Maps JavaScript API.

Constants
`ADMINISTRATIVE_AREA_LEVEL_1`	Indicates a first-order civil entity below the country level.
`ADMINISTRATIVE_AREA_LEVEL_2`	Indicates a second-order civil entity below the country level.
`COUNTRY`	Indicates the national political entity.
`BetaDATASET`	Notice: Available only in the v=beta channel. Indicates a third-party dataset.
`LOCALITY`	Indicates an incorporated city or town political entity.
`POSTAL_CODE`	Indicates a postal code as used to address postal mail within the country. Includes zip codes.
`SCHOOL_DISTRICT`	Indicates a school district.

FeatureStyleFunction typedef

google.maps.FeatureStyleFunction typedef

A function to style a FeatureLayer.

function(FeatureStyleFunctionOptions): (FeatureStyleOptions optional)

FeatureStyleFunctionOptions interface

google.maps.FeatureStyleFunctionOptions interface

Options passed to a FeatureStyleFunction.

Properties
`feature`	Type: `Feature` `Feature` passed into the `FeatureStyleFunction` for styling.

FeatureStyleOptions interface

google.maps.FeatureStyleOptions interface

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

Properties
`fillColor optional`	Type: `string optional` Hex RGB string (like "#00FF00" for green). Only applies to polygon geometries.
`fillOpacity optional`	Type: `number optional` The fill opacity between 0.0 and 1.0. Only applies to polygon geometries.
`strokeColor optional`	Type: `string optional` Hex RGB string (like "#00FF00" for green).
`strokeOpacity optional`	Type: `number optional` The stroke opacity between 0.0 and 1.0. Only applies to line and polygon geometries.
`strokeWeight optional`	Type: `number optional` The stroke width in pixels. Only applies to line and polygon geometries.

Feature interface

google.maps.Feature interface

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

Properties
`featureType`	Type: `FeatureType` `FeatureType` of this `Feature`.

PlaceFeature interface

google.maps.PlaceFeature interface

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

This interface extends Feature .

Properties
`placeId`	Type: `string` The `PlaceResult.place_id` .
Inherited: `featureType`

Methods
`fetchPlace`	`fetchPlace()` Parameters: None Return Value: `Promise<Place>` Fetches a `Place` for this `PlaceFeature`. In the resulting `Place` object, the `id` and the `displayName` 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 via `Place.fetchFields()` subject to normal Places API enablement and billing.) Do not call this from a `FeatureStyleFunction` since only synchronous FeatureStyleFunctions are supported. The promise is rejected if there was an error fetching the `Place`.

Methods

fetchPlace

fetchPlace()

Parameters: None

Return Value: Promise<Place>

Fetches a Place for this PlaceFeature. In the resulting Place object, the id and the displayName 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 via Place.fetchFields() subject to normal Places API enablement and billing.) Do not call this from a FeatureStyleFunction since only synchronous FeatureStyleFunctions are supported. The promise is rejected if there was an error fetching the Place.

DatasetFeature interface

google.maps.DatasetFeature interface

An interface representing a feature from a Dataset. The featureType of a DatasetFeature will always be FeatureType.DATASET.

This interface extends Feature .

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`

FeatureMouseEvent interface

google.maps.FeatureMouseEvent interface

This object is returned from a mouse event on a FeatureLayer.

This interface extends MapMouseEvent .

Properties
`features`	Type: `Array<Feature>` The `Feature`s at this mouse event.
Inherited: `domEvent` , `latLng`

Methods
Inherited: `stop`

Data-driven styling Stay organized with collections Save and categorize content based on your preferences.

FeatureLayer interface

Properties

Methods

Events

FeatureType constants

Constants

FeatureStyleFunction typedef

FeatureStyleFunctionOptions interface

Properties

FeatureStyleOptions interface

Properties

Feature interface

Properties

PlaceFeature interface

Properties

Methods

DatasetFeature interface

Properties

FeatureMouseEvent interface

Properties

Methods

Data-driven styling