Rename .active to .show

scss/_animation.scss

@@ -3,26 +3,26 @@
 
   @include transition(opacity .15s linear);
 
-  &.active {
+  &.show {
     opacity: 1;
   }
 }
 
 .collapse {
   display: none;
-  &.active {
+  &.show {
     display: block;
   }
 }
 
 tr {
-  &.collapse.active {
+  &.collapse.show {
     display: table-row;
   }
 }
 
 tbody {
-  &.collapse.active {
+  &.collapse.show {
     display: table-row-group;
   }
 }

scss/_dropdown.scss

@@ -111,7 +111,7 @@
 }
 
 // Open state for the dropdown
-.active {
+.show {
   // Show the menu
   > .dropdown-menu {
     display: block;

scss/_modal.scss

@@ -31,7 +31,7 @@
     @include transition(transform .3s ease-out);
     transform: translate(0, -25%);
   }
-  &.active .modal-dialog { transform: translate(0, 0); }
+  &.show .modal-dialog { transform: translate(0, 0); }
 }
 .modal-open .modal {
   overflow-x: hidden;
@@ -69,7 +69,7 @@
 
   // Fade for backdrop
   &.fade { opacity: 0; }
-  &.active { opacity: $modal-backdrop-opacity; }
+  &.show { opacity: $modal-backdrop-opacity; }
 }
 
 // Modal header

scss/_tooltip.scss

@@ -11,7 +11,7 @@
   word-wrap: break-word;
   opacity: 0;
 
-  &.active { opacity: $tooltip-opacity; }
+  &.show { opacity: $tooltip-opacity; }
 
   &.tooltip-top,
   &.bs-tether-element-attached-bottom {