feat(variant/indicator): add submodule to handle + in variants.

variant/_index.scss

@@ -1,3 +1,4 @@
+@forward 'indicator' as indicator-*;
 @forward 'update' as update-*;
 @forward 'variant.create.function';
 @forward 'variant.modify.function';

variant/indicator/_index.scss

@@ -0,0 +1,2 @@
+@forward 'indicator.index.function';
+@forward 'indicator.remove.function';

variant/indicator/_indicator.index.function.scss

@@ -0,0 +1,17 @@
+// Modules.
+@use '../../string';
+
+// Status: DONE
+// The `indicator.index()` function.
+// @param `$item`
+// @param `$indicator`
+// @returns
+@function index($item, $indicator) {
+  @each $value in $item {
+    $index: string.index(#{$value}, $indicator);
+    @if $index {
+      @return $index > 0;
+    }
+  }
+  @return false;
+}

variant/indicator/_indicator.remove.function.scss

@@ -0,0 +1,24 @@
+// Sass.
+@use 'sass:list';
+
+// Modules.
+@use '../../list/remove';
+@use '../../string';
+
+// Status: TODO:
+// The `indicator.remove()` function.
+// @param `$item`
+// @param `$indicator`
+// @returns
+@function remove($item, $indicator) {
+  $i: 1;
+  $item: remove.value($item, '+');
+  @each $value in $item {
+    @if type-of($value) == string {
+      $item: list.set-nth($item, $i, string.replace(#{$value}, all, $indicator, ''));
+    }
+
+    $i: $i + 1;
+  }
+  @return $item;
+}