Merge pull request #18473 from twbs/fix-18036

Remove useless .col-*-offset-12 and .col-xs-offset-0 classes

dist/css/bootstrap.css

@@ -988,10 +988,6 @@ pre code {
   left: 100%;
 }
 
-.col-xs-offset-0 {
-  margin-left: 0;
-}
-
 .col-xs-offset-1 {
   margin-left: 8.333333%;
 }
@@ -1036,10 +1032,6 @@ pre code {
   margin-left: 91.666667%;
 }
 
-.col-xs-offset-12 {
-  margin-left: 100%;
-}
-
 @media (min-width: 544px) {
   .col-sm-1, .col-sm-2, .col-sm-3, .col-sm-4, .col-sm-5, .col-sm-6, .col-sm-7, .col-sm-8, .col-sm-9, .col-sm-10, .col-sm-11, .col-sm-12 {
     float: left;
@@ -1194,9 +1186,6 @@ pre code {
   .col-sm-offset-11 {
     margin-left: 91.666667%;
   }
-  .col-sm-offset-12 {
-    margin-left: 100%;
-  }
 }
 
 @media (min-width: 768px) {
@@ -1353,9 +1342,6 @@ pre code {
   .col-md-offset-11 {
     margin-left: 91.666667%;
   }
-  .col-md-offset-12 {
-    margin-left: 100%;
-  }
 }
 
 @media (min-width: 992px) {
@@ -1512,9 +1498,6 @@ pre code {
   .col-lg-offset-11 {
     margin-left: 91.666667%;
   }
-  .col-lg-offset-12 {
-    margin-left: 100%;
-  }
 }
 
 @media (min-width: 1200px) {
@@ -1671,9 +1654,6 @@ pre code {
   .col-xl-offset-11 {
     margin-left: 91.666667%;
   }
-  .col-xl-offset-12 {
-    margin-left: 100%;
-  }
 }
 
 .table {

scss/mixins/_grid-framework.scss

@@ -13,7 +13,9 @@
     padding-left: ($gutter / 2);
     padding-right: ($gutter / 2);
   }
+  $breakpoint-counter: 0;
   @each $breakpoint in map-keys($breakpoints) {
+    $breakpoint-counter: ($breakpoint-counter + 1);
     @for $i from 1 through $columns {
       .col-#{$breakpoint}-#{$i} {
         @extend %grid-column;
@@ -32,13 +34,21 @@
           @include make-col-span($i, $columns);
         }
       }
-      @each $modifier in (pull, push, offset) {
+      @each $modifier in (pull, push) {
         @for $i from 0 through $columns {
           .col-#{$breakpoint}-#{$modifier}-#{$i} {
             @include make-col-modifier($modifier, $i, $columns)
           }
         }
       }
+      // `$columns - 1` because offsetting by the width of an entire row isn't possible
+      @for $i from 0 through ($columns - 1) {
+        @if $breakpoint-counter != 1 or $i != 0 { // Avoid emitting useless .col-xs-offset-0
+          .col-#{$breakpoint}-offset-#{$i} {
+            @include make-col-modifier(offset, $i, $columns)
+          }
+        }
+      }
     }
   }
 }