Use custom divide() function instead of Dart Sass math module for greater compatibility

mdo · mdo · commit 85f98fe8d443 · 2021-06-13T18:23:23.000-07:00
diff --git a/scss/_functions.scss b/scss/_functions.scss
@@ -123,7 +123,7 @@ $_luminance-list: .0008 .001 .0011 .0013 .0015 .0017 .002 .0022 .0025 .0027 .003
   $l1: luminance($background);
   $l2: luminance(opaque($background, $foreground));
 
-  @return if($l1 > $l2, ($l1 + .05) / ($l2 + .05), ($l2 + .05) / ($l1 + .05));
+  @return if($l1 > $l2, divide($l1 + .05, $l2 + .05), divide($l2 + .05, $l1 + .05));
 }
 
 // Return WCAG2.0 relative luminance
@@ -137,7 +137,7 @@ $_luminance-list: .0008 .001 .0011 .0013 .0015 .0017 .002 .0022 .0025 .0027 .003
   );
 
   @each $name, $value in $rgb {
-    $value: if($value * .555 < .03928, $value * .555 / 12.92, nth($_luminance-list, $value + 1));
+    $value: if($value * .555 < .03928, divide($value * .555, 12.92), nth($_luminance-list, $value + 1));
     $rgb: map-merge($rgb, ($name: $value));
   }
 
@@ -219,3 +219,28 @@ $_luminance-list: .0008 .001 .0011 .0013 .0015 .0017 .002 .0022 .0025 .0027 .003
 
   @return if($return-calc == true, calc(#{$value1} - #{$value2}), $value1 + unquote(" - ") + $value2);
 }
+
+@function divide($dividend, $divisor, $precision: 10) {
+  $sign: if($dividend > 0 and $divisor > 0, 1, -1);
+  $dividend: abs($dividend);
+  $divisor: abs($divisor);
+  $quotient: 0;
+  $remainder: $dividend;
+  @if $dividend == 0 {
+    @return 0;
+  }
+  @if $divisor == 0 {
+    @error "Cannot divide by 0";
+  }
+  @if $divisor == 1 {
+    @return $dividend;
+  }
+  @while $remainder >= $divisor {
+    $quotient: $quotient + 1;
+    $remainder: $remainder - $divisor;
+  }
+  @if $remainder > 0 and $precision > 0 {
+    $remainder: divide($remainder * 10, $divisor, $precision - 1) * .1;
+  }
+  @return ($quotient + $remainder) * $sign;
+}
diff --git a/scss/mixins/_grid.scss b/scss/mixins/_grid.scss
@@ -1,3 +1,5 @@
+@use "sass:math";
+
 /// Grid system
 //
 // Generate semantic grid columns with these mixins.
@@ -29,7 +31,8 @@
 @mixin make-col($size: false, $columns: $grid-columns) {
   @if $size {
     flex: 0 0 auto;
-    width: percentage($size / $columns);
+    width: percentage(divide($size, $columns));
+
   } @else {
     flex: 1 1 0;
     max-width: 100%;
