feat: initial commit

src/lib/cx.js

@@ -0,0 +1,19 @@
+const prefix = 'bx';
+
+function cx(...items) {
+  const classes = [];
+
+  items.forEach(item => {
+    if (typeof item === 'string') {
+      if (item.slice(0, 2) === '--') {
+        classes.push(`${prefix}${item}`);
+      } else {
+        classes.push(item);
+      }
+    }
+  });
+
+  return classes.join(' ');
+}
+
+export { cx };

src/lib/index.js

@@ -0,0 +1 @@
+export { cx } from './cx';