On the standards track: Yes
Is Experimental: No
Is Deprecated: Yes
In Chrome version 114 on 2023-05-30 Note: Before version 114, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 114, the keyword aliases to the standard auto keyword. See bug 40444262.
In Chrome Android version 114 on 2023-05-30 Note: Before version 114, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 114, the keyword aliases to the standard auto keyword. See bug 40444262.
In Edge version 114 on 2023-06-02 Note: Before version 114, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 114, the keyword aliases to the standard auto keyword. See bug 40444262.
In Firefox version 112 on 2023-04-11
In Firefox for Android version 112 on 2023-04-11
Not in Internet Explorer
In Quest Browser version 21.0 on 2022-04-25 Note: Before version false, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version false, the keyword aliases to the standard auto keyword. See bug 40444262.
In Opera version 100 on 2023-06-29 Note: Before version 100, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 100, the keyword aliases to the standard auto keyword. See bug 40444262.
Not in Opera Android
In Safari version 12 on 2018-09-17 Note: Before version 12, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 12, the keyword aliases to the standard auto keyword. See bug 189811.
In Safari on iOS version 12 on 2018-09-17 Note: Before version 12, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 12, the keyword aliases to the standard auto keyword. See bug 189811.
In Samsung Internet version 4.0 on 2016-03-11
In WebView Android version 114 on 2023-05-30 Note: Before version 114, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 114, the keyword aliases to the standard auto keyword. See bug 40444262.
In WebView on iOS version 12 on 2018-09-17 Note: Before version 12, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 12, the keyword aliases to the standard auto keyword. See bug 189811.