progress

test.js

@@ -0,0 +1,17 @@
+class Nugga {
+    mufassa = 22;
+    constructor() {
+        this.fjæsing = 22;
+        console.debug(Object.prototype.hasOwnProperty.call(this, "fjæsing"));
+    }
+
+    diller(snaps = this.fjæsing) {
+        console.log(snaps);
+    }
+}
+
+class Dugga extends Nugga {}
+
+const n = new Dugga();
+
+console.log(n, n.diller(), n instanceof Dugga);