feat: darkened

common/traits/darkened.trait.js

@@ -0,0 +1,21 @@
+import {Trait} from '@avocado/entity';
+
+// Input handling.
+export class Darkened extends Trait {
+
+  static defaultParams() {
+    return {
+      isDarkened: true,
+    };
+  }
+
+  initialize() {
+    this._isDarkened = this.params.get('isDarkened');
+  }
+
+  get isDarkened() {
+    return this._isDarkened;
+  }
+
+}
+