# Package com.google.gwt.user.client

Fundamental user-interface classes used in client-side GWT code.

See: Description

Interface Summary
Command: Encapsulates an action for later execution, often from a different context.
DocumentModeAsserter.DocumentModeProperty: Interface to provide configuration property value.
Event.NativePreviewHandler: Handler interface for `Event.NativePreviewEvent` events.
EventListener: Receives low-level browser events.
EventPreview: Deprecated replaced by `Event.NativePreviewHandler`
HistoryListener: Deprecated use `History.addValueChangeHandler(com.google.gwt.event.logical.shared.ValueChangeHandler)` instead
IncrementalCommand: Deprecated Replaced by `Scheduler.RepeatingCommand` and `Scheduler.scheduleIncremental()`
ResponseTextHandler: Implement this interface to receive HTTP completion events.
TakesValue<V>: Implemented by objects that hold a value.
Window.ClosingHandler: Handler for `Window.ClosingEvent` events.
Window.ScrollHandler: Handler for `Window.ScrollEvent` events.
WindowCloseListener: Deprecated use `Window.ClosingHandler` and `CloseHandler` instead
WindowResizeListener: Deprecated use `ResizeHandler` instead
WindowScrollListener: Deprecated use `Window.addWindowScrollHandler(com.google.gwt.user.client.Window.ScrollHandler)` instead instead

Class Summary
BaseListenerWrapper<T>: Deprecated will be removed in GWT 2.7 with the handler listeners themselves
BaseListenerWrapper.WrapWindowClose
BaseListenerWrapper.WrapWindowResize
BaseListenerWrapper.WrapWindowScroll
CommandExecutor: Class which executes `Command`s and `IncrementalCommand`s after all currently pending event handlers have completed.
Cookies: Provides access to browser cookies stored on the client.
DeferredCommand: Deprecated Replaced by `Scheduler.scheduleDeferred()` because the static nature of this API prevents effective mocking for JRE-only tests.
DocumentModeAsserter: Helper class, which, during startup, asserts that the browser's current rendering mode is one of the values allowed by the "document.compatMode".
DOM: This class provides a set of static methods that allow you to manipulate the browser's Document Object Model (DOM).
Element: Deprecated
Event: An opaque handle to a native DOM Event.
Event.NativePreviewEvent: Represents a preview of a native `Event`.
History: This class allows you to interact with the browser's history stack.
Random: This class can be used as a substitute for `Random`.
Timer: A simplified, browser-safe timer class.
Window: This class provides access to the browser window's methods, properties, and events.
Window.ClosingEvent: Fired just before the browser window closes or navigates to a different site.
Window.Location: This class provides access to the browser's location's object.
Window.Navigator: This class provides access to the browser's navigator object.
Window.ScrollEvent: Fired when the browser window is scrolled.

Enum Summary
DocumentModeAsserter.Severity: Determine the severity of the runtime $doc.compatMode check:

Exception Summary
CommandCanceledException: Exception reported to the current `GWT.UncaughtExceptionHandler` when a deferred `Command` is canceled as a result of a slow script warning.
IncrementalCommandCanceledException: Exception reported to the current `GWT.UncaughtExceptionHandler` when a deferred `IncrementalCommand` is canceled as a result of a slow script warning.

## Package com.google.gwt.user.client Description

Fundamental user-interface classes used in client-side GWT code. This package contains classes representing fundamental concepts, such as browser history, the browser window, DOM manipulation, and event handling. It also contains convenience classes such as Timer and Random.