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The windowState read-only property of the Window interface returns the window's current state.

More info on window events and Window.state can be seen here.


var state = window.windowState;

Return value

Possible windowState values are:

State Value Description
STATE_MAXIMIZED 1 The window is maximized.
STATE_MINIMIZED 2 The window is minimized.
STATE_NORMAL 3 The window is normal.
STATE_FULLSCREEN 4 The window is in full screen mode.


if (window.windowState === 1) {} // window is maximized
else if (window.windowState === 2) {} // window is minimized
else if (window.windowState === 3) {} // window is normal
else if (window.windowState === 4) {} // window is in fullscreen mode
else {}

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