On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 4 on 2010-01-25
In Chrome Android version 18 on 2012-06-27
In Edge version 12 on 2015-07-29
In Firefox version 4 on 2011-03-22
In Firefox for Android version 4 on 2011-03-29
In Internet Explorer version 10 on 2012-10-26
In Quest Browser version 5.0 on undefined
In Opera version ≤12.1 on undefined
In Opera Android version ≤12.1 on undefined
In Safari version 5 on 2010-06-07 Note: Before Safari 17, newline characters counted as two characters instead of one. See bug 249916.
In Safari on iOS version 4.2 on 2010-11-22 Note: Before Safari on iOS 17, newline characters counted as two characters instead of one. See bug 249916.
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 4.4 on 2013-12-09
In WebView on iOS version 4.2 on 2010-11-22 Note: Before WebView on iOS 17, newline characters counted as two characters instead of one. See bug 249916.