On the standards track: Yes
Is Experimental: No
Is Deprecated: Yes
Not in Chrome Note: Since Chrome 1, the attribute can be set, but has no effect.
Not in Chrome Android Note: Since Chrome Android 18, the attribute can be set, but has no effect.
In Edge version 12 on 2015-07-29 Note: Since Edge 79, the attribute can be set, but has no effect. Removed from Edge version 79 on 2020-01-15
In Firefox version 1 on 2004-11-09
In Firefox for Android version 4 on 2011-03-29
In Internet Explorer version ≤11 on undefined
Not in Quest Browser Note: Since Quest Browser 5.0, the attribute can be set, but has no effect.
Not in Opera Note: Since Opera 15, the attribute can be set, but has no effect.
Not in Opera Android Note: Since Opera Android 14, the attribute can be set, but has no effect.
Not in Safari Note: Since Safari 3, the attribute can be set, but has no effect.
Not in Safari on iOS Note: Since Safari on iOS 2, the attribute can be set, but has no effect.
Not in Samsung Internet Note: Since Samsung Internet 1.0, the attribute can be set, but has no effect.
Not in WebView Android Note: Since WebView Android 4.4, the attribute can be set, but has no effect.
Not in WebView on iOS Note: Since WebView on iOS 2, the attribute can be set, but has no effect.