update progress bar documentation

clarify lack of support for striped and animated striped bars in
IE10+/Edge

diff --git a/docs/components/progress.md b/docs/components/progress.md
index e801373cd14be67019f16fc586554e8c5dea4919..480da4903e67ee0c34f632288a3d359f69f2d99f 100644 (file)
--- a/docs/components/progress.md
+++ b/docs/components/progress.md
@@ -60,7 +60,7 @@ Uses a gradient to create a striped effect.
 
 The striped gradient can also be animated. Add `.progress-animated` to `.progress` to animate the stripes right to left via CSS3 animations.
 
-**Animated progress bars do not work in IE9 and Opera 12** as they don't support CSS3 animations.
+**Animated progress bars do not work in IE9 and Opera 12** – as they don't support CSS3 animations – **nor in IE10+ and Microsoft Edge** – as they currently don't support CSS3 animations on the [`::-ms-fill` pseudo-element](https://msdn.microsoft.com/en-us/library/windows/apps/hh465757.aspx).
 
 <div class="bd-example">
   <progress class="progress progress-striped" value="25" max="100">25%</progress>