Window.outerWidth gets the width of the outside of the browser window. It represents the width of the whole browser window including sidebar (if expanded), window chrome and window resizing borders/handles.
This property is read-only; it has no default value.
outWindowWidth = window.outerWidth;
On return, outWindowWidth is the width of the outside of the window.
To change the size of a window, see window.resizeBy() and window.resizeTo().
To get the inner width of a window, i.e. the width of the page being displayed, see window.innerWidth.
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 1 | (Yes) | 1.0 (1.7 or earlier) | 9 | 9 | 3 |
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | 1 | (Yes) | 1.0 (1.0) | 9 | 9 | 3 |
| Specification | Status | Comment |
|---|---|---|
| CSS Object Model (CSSOM) View Module The definition of 'Window.outerWidth' in that specification. | Working Draft | Initial definition. |
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https://developer.mozilla.org/en-US/docs/Web/API/window/outerWidth