add mask

src/controls/index.js

@@ -1,5 +1,15 @@
 export default class Controls {
-  constructor({ option }) {
-    //
+  constructor(art) {
+    this.art = art;
+  }
+
+  show() {
+    const { $wrap } = this.art.refs;
+    $wrap.classList.add('controls-show');
+  }
+
+  hide() {
+    const { $wrap } = this.art.refs;
+    $wrap.classList.remove('controls-show');
   }
 }