The state of this browser window.


Values of this type are strings. Possible values are:


The window is at the default size or user-selected size.


The window is only visible as an icon in the taskbar or .


The window fills the screen on which it is displayed not including any screen areas reserved by the operating system.


The window is running as a full screen application or content in a tab is using the Fullscreen API


A docked window occupies a fixed position relative to other windows owned by the same application.

macOS compatibility: Beginning in macOS 10.10, the default maximizing behavior for windows changed to run applications as full screen applications instead of "zoomed" windows. fullscreen refers to both the browser running as a full screen application and when content in a tab uses the Fullscreen API.

Browser compatibility

BCD tables only load in the browser

Note: This API is based on Chromium's API. This documentation is derived from windows.json in the Chromium code.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.