dart:ui_web library

Classes

AssetManager: This class downloads assets over the network.
BrowserDetection: The core Browser Detection functionality from the Flutter web engine.
BrowserPlatformLocation: Delegates to real browser APIs to provide platform location functionality.
FlutterViewManagerProxy: This class exposes web-only attributes for the registered views in a multi-view app.
HashUrlStrategy: This is an implementation of UrlStrategy that uses the browser URL's hash fragments to represent its state.
PlatformLocation: Encapsulates all calls to DOM apis, which allows the UrlStrategy classes to be platform agnostic and testable.
PlatformViewRegistry: A registry for factories that create platform views.
UrlStrategy: Represents and reads route state from the browser's URL.

assetManager → AssetManager: Provides the AssetManager used by the Flutter Engine.
no setter
benchmarkValueCallback ← BenchmarkValueCallback?: A callback for receiving benchmark values.
no getter
browser ↔ BrowserDetection: A short-hand accessor to the BrowserDetection.instance singleton.
getter/setter pair
debugDefaultUrlStrategyOverride ↔ UrlStrategy?: Overrides the default URL strategy.
getter/setter pair
debugEmulateFlutterTesterEnvironment ↔ bool: Whether the Flutter engine is running in flutter test emulation mode.
getter/setter pair
isCustomUrlStrategySet ↔ bool: Whether a custom URL strategy has been set or not.
getter/setter pair
platformViewRegistry → PlatformViewRegistry: The platform view registry for this app.
final
urlStrategy ↔ UrlStrategy?: Returns the present UrlStrategy for handling the browser URL.
getter/setter pair
views → FlutterViewManagerProxy: Exposes web-only functionality for this app's FlutterViews objects.
final

bootstrapEngine({VoidCallback? registerPlugins, VoidCallback? runApp}) → Future<void>: Bootstraps the Flutter Web engine and app.
createImageCodecFromUrl(Uri uri, {ImageCodecChunkCallback? chunkCallback}) → Future<Codec>: Creates a ui.Codec for the image located at uri.
createImageFromImageBitmap(JSAny imageSource) → FutureOr<Image>: Creates a ui.Image from an ImageBitmap object.
createImageFromTextureSource(JSAny object, {required int width, required int height, bool transferOwnership = false}) → FutureOr<Image>: Creates a ui.Image from a valid texture source (for example HTMLImageElement | HTMLVideoElement | HTMLCanvasElement).
debugOverrideDevicePixelRatio(double? value) → void: Overrides the value of ui.FlutterView.devicePixelRatio in tests.
debugResetCustomUrlStrategy() → void: Resets everything to do with custom URL strategy.
preventCustomUrlStrategy() → void: From this point on, prevents setting a custom URL strategy.
setPluginHandler(PlatformMessageCallback handler) → void: Sets the handler that forwards platform messages to web plugins.

BenchmarkValueCallback = void Function(String name, double value): Signature of the callback that receives a benchmark value labeled by name.
EventListener = dynamic Function(Object event): Function type that handles pop state events.
ImageCodecChunkCallback = void Function(int cumulativeBytesLoaded, int expectedTotalBytes): Signature of the callback that receives progress updates as image chunks are loaded.
ParameterizedPlatformViewFactory = Object Function(int viewId, {Object? params}): A function which takes a unique id and some params and creates an HTML element.
PlatformViewFactory = Object Function(int viewId): A function which takes a unique id and creates an HTML element.
PopStateListener = void Function(Object? state): Callback that receives the new state of the browser history entry.