fix(border.style): zero value (#279)

Author: tenphi

.changeset/eight-pans-sneeze.md

@@ -0,0 +1,5 @@
+---
+"@cube-dev/ui-kit": patch
+---
+
+ The `border` style now explicitly sets zero-width border for all border that are not mentioned by modifiers. So that it always overrides default values.

src/tasty/styles/border.ts

@@ -38,11 +38,13 @@ export function borderStyle({ border }) {
     return { border: styleValue };
   }
 
+  const zeroValue = [0, type, borderColor].join(' ');
+
   return DIRECTIONS.reduce((styles, dir) => {
     if (mods.includes(dir)) {
       styles[`border-${dir}`] = styleValue;
     } else {
-      styles[`border-${dir}`] = '0 solid borderColor';
+      styles[`border-${dir}`] = zeroValue;
     }
 
     return styles;