Merge pull request #18051 from twbs/impl-18044

Add touch-action:manipulation on interactive elements to avoid 300ms click delay

scss/_buttons.scss

@@ -8,7 +8,6 @@
   text-align: center;
   white-space: nowrap;
   vertical-align: middle;
-  touch-action: manipulation;
   cursor: pointer;
   user-select: none;
   border: $border-width solid transparent;

scss/_reboot.scss

@@ -206,6 +206,28 @@ img {
   cursor: pointer;
 }
 
+
+// Avoid 300ms click delay on touch devices that support the `touch-action` CSS property.
+//
+// In particular, unlike most other browsers, IE11+Edge on Windows 10 on touch devices and IE Mobile 10-11
+// DON'T remove the click delay when `<meta name="viewport" content="width=device-width">` is present.
+// However, they DO support removing the click delay via `touch-action: manipulation`.
+// See:
+// * http://caniuse.com/#feat=css-touch-action
+// * http://patrickhlauke.github.io/touch/tests/results/#suppressing-300ms-delay
+
+a,
+area,
+button,
+[role="button"],
+input,
+label,
+select,
+summary,
+textarea {
+  touch-action: manipulation;
+}
+
 //
 // Tables
 //