Exmple for getOwnKeys

Author: tshemsedinov

JavaScript/6-keys.js

@@ -0,0 +1,11 @@
+'use strict';
+
+const data = { name: 'Marcus Aurelius', city: 'Rome', _born: 121 };
+
+const person = new Proxy(data, {
+  ownKeys(obj) {
+    return Object.keys(obj).filter(name => !name.startsWith('_'));
+  }
+});
+
+console.dir(Object.keys(person));