Width (in pixels) of the browser window viewport including, if rendered, the vertical scrollbar.
Note: If you use
nsIDOMWindowUtils.setCSSViewport() to set the virtual window size for page layout purposes, the value returned by this property corresponds to the viewport width set using that method.Syntax
var intViewportWidth = window.innerWidth;
Value
intViewportWidth stores the window.innerWidth property value.
The window.innerWidth property is read only; it has no default value.
Notes
The innerWidth property is supported in any window object like a window, a frame, a frameset, or a secondary window.
There is an algorithm to obtain the width of the viewport excluding, if rendered, the vertical scrollbar.
Example
// This will return the width of the viewport var intFrameWidth = window.innerWidth; // This will return the width of the frame viewport within a frameset var intFrameWidth = self.innerWidth; // This will return the width of the viewport of the closest frameset var intFramesetWidth = parent.innerWidth; // This will return the width of the viewport of the outermost frameset var intOuterFramesetWidth = top.innerWidth;
To change the size of a window, see window.resizeBy and window.resizeTo.
Specification
| Specification | Status | Comment |
|---|---|---|
| CSS Object Model (CSSOM) View Module The definition of 'window.innerWidth' in that specification. |
Working Draft | Initial definition |
Browser compatibility
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 1 | (Yes) | 1.0 (1.7 or earlier)[1] | 9 | 9 | 3 |
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | 1 | (Yes) | 1.0 (1.0)[1] | 9 | 9 | 3 |
[1] From Firefox 4 to 24, this property was buggy and could give a wrong value before page load on certain circumstances, see bug 641188.
See also
Document Tags and Contributors
Tags:
Contributors to this page:
libbymc,
mrenty,
Sebastianz,
cvrebert,
fscholz,
teoli,
Delapouite,
kscarfone,
Jeremie,
Sheppy,
McGurk,
reustle,
shelbymoore3,
pjotrb123,
Mgjbot,
Waldo,
GT,
Dria,
Wladimir_Palant
Last updated by:
libbymc,