_modal.scss in bootstrap-4.0.0.alpha5

- old
+ new

@@ -1,9 +1,9 @@
 // .modal-open      - body class for killing the scroll
 // .modal           - container to scroll within
 // .modal-dialog    - positioning shell for the actual modal
-// .modal-content   - actual modal w/ bg and corners and shit
+// .modal-content   - actual modal w/ bg and corners and stuff
 
 
 // Kill the scroll on the body
 .modal-open {
   overflow: hidden;
@@ -20,10 +20,12 @@
   display: none;
   overflow: hidden;
   // Prevent Chrome on Windows from adding a focus outline. For details, see
   // https://github.com/twbs/bootstrap/pull/10951.
   outline: 0;
-  -webkit-overflow-scrolling: touch;
+  // We deliberately don't use `-webkit-overflow-scrolling: touch;` due to a
+  // gnarly iOS Safari bug: https://bugs.webkit.org/show_bug.cgi?id=158342
+  // See also https://github.com/twbs/bootstrap/issues/17695
 
   // When fading in the modal, animate it to slide down
   &.fade .modal-dialog {
     transition: transform .3s ease-out;
     transform: translate(0, -25%);