On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 2 on 2009-05-21
In Chrome Android version 18 on 2012-06-27
In Edge version 12 on 2015-07-29
In Firefox version 3.5 on 2009-06-30 Note: Firefox versions before 57 have a bug whereby transitions will not work when transitioning from a text-shadow with a color specified to a text-shadow without a color specified (bug 726550). From Firefox 4, the blur radius is capped at 300 for performance reasons. Firefox theoretically supports infinite text-shadows (don't try it). If the <color> value is unspecified, then Firefox uses the value of the element's color property.
In Firefox for Android version 4 on 2011-03-29 Note: Firefox for Android versions before 57 have a bug whereby transitions will not work when transitioning from a text-shadow with a color specified to a text-shadow without a color specified (bug 726550). From Firefox for Android 4, the blur radius is capped at 300 for performance reasons. Firefox for Android theoretically supports infinite text-shadows (don't try it). If the <color> value is unspecified, then Firefox for Android uses the value of the element's color property.
In Internet Explorer version 10 on 2012-10-26
In Quest Browser version 5.0 on undefined
In Opera version 9.5 on 2008-06-12 Note: Opera supports a maximum of 6-9 text-shadows for performance reasons. The blur radius is limited to 100px. Opera 9.5 to 10.1 adheres to the old, reverse painting order (in CSS2, the first specified shadow is on the bottom).
In Opera Android version 14 on 2013-05-21
In Safari version 1.1 on 2003-10-24 Note: In Safari, any shadows that do not explicitly specify a color are transparent. Safari 1.1 to 3.2 only supports one text-shadow (displays the first shadow of a comma-separated list and ignores the rest). Safari 4.0 (WebKit 528) and later support multiple text-shadows.
In Safari on iOS version 1 on 2007-06-29 Note: In Safari, any shadows that do not explicitly specify a color are transparent. Safari iOS 1 and 2 only support one text-shadow (displays the first shadow of a comma-separated list and ignores the rest). Safari iOS 3 (WebKit 528) and later support multiple text-shadows.
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 1 on 2007-06-29 Note: In Safari, any shadows that do not explicitly specify a color are transparent. Safari iOS 1 and 2 only support one text-shadow (displays the first shadow of a comma-separated list and ignores the rest). Safari iOS 3 (WebKit 528) and later support multiple text-shadows.