This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The Screen.availWidth property returns the amount of horizontal space (in CSS pixels) available to the window.
A number.
const screenAvailWidth = window.screen.availWidth; console.log(screenAvailWidth);
| Specification |
|---|
| CSSOM View Module> # dom-screen-availwidth> |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
availWidth |
1 | 12Always reflects the main screen. |
1 | ≤12.1 | 1 | 18 | 4 | ≤12.1 | 1 | 1.0 | 4.4 | 1 |
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https://developer.mozilla.org/en-US/docs/Web/API/Screen/availWidth