On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 16 on 2011-12-13 Note: Before Chrome 112, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).
In Chrome Android version 18 on 2012-06-27 Note: Before Chrome Android 112, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).
In Edge version 12 on 2015-07-29 Note: Before Edge 112, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).
In Firefox version 15 on 2012-08-28 Note: Small SVGs are incorrectly stretched, because percentages in border-image-slice are computed to integers instead of floats (bug 1284797). Until Firefox 47, SVGs without viewport were not sliced correctly (bug 619500). From Firefox 48 until Firefox 49, SVGs without viewport are displayed the same as SVGs with viewport, but if the slices are not exactly 50%, they are incorrectly stretched (bug 1264809). Until Firefox 57, an issue persisted for SVGs without viewport when e10s was disabled (bug 1290782). Before Firefox 15, an earlier version of the specification was implemented, prefixed.
In Firefox for Android version 15 on 2012-08-28 Note: Small SVGs are incorrectly stretched, because percentages in border-image-slice are computed to integers instead of floats (bug 1284797). Until Firefox for Android 47, SVGs without viewport were not sliced correctly (bug 619500). From Firefox for Android 48 until Firefox for Android 49, SVGs without viewport are displayed the same as SVGs with viewport, but if the slices are not exactly 50%, they are incorrectly stretched (bug 1264809). Until Firefox for Android 57, an issue persisted for SVGs without viewport when e10s was disabled (bug 1290782). Before Firefox for Android 15, an earlier version of the specification was implemented, prefixed.
In Internet Explorer version 11 on 2013-10-17
In Quest Browser version 5.0 on undefined Note: Before Quest Browser false, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).
In Opera version 11 on 2010-12-16 Note: Before Opera 98, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).
In Opera Android version 11 on 2011-03-22 Note: A border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).
In Safari version 6 on 2012-07-25
In Safari on iOS version 6 on 2012-09-10
In Samsung Internet version 1.0 on 2013-04-27 Note: Before Samsung Internet 23.0, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).
In WebView Android version 4.4 on 2013-12-09 Note: Before WebView 112, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).
In WebView on iOS version 6 on 2012-09-10