A bit better implementation

lib/constructs/interface.js

@@ -42,16 +42,18 @@ ${this.name}PropertiesConstructor.prototype.constructor = ${this.name}Properties
 
   this.str += `
 const ${this.name}Properties = new Proxy(${this.name}PropertiesConstructor.prototype, {
+  defineProperty() {
+    return false;
+  },
+  deleteProperty() {
+    return false;
+  },
   get(target, key) {
     if (key in this) {
       return this[key];
     }
     return target[key];
   },
-  set(target, key, value) {
-    this[key] = value;
-    return true;
-  }
 });\n\n`;
 };
 
@@ -97,8 +99,7 @@ Interface.prototype.generateConstructor = function () {
     this.str += `${this.name}.prototype = Object.create(${this.idl.inheritance}.interface.prototype);
 ${this.name}.prototype.constructor = ${this.name};\n`;
   } else if (utils.isGlobal(this.idl)) {
-    this.str += `${this.name}.prototype = Object.create(${this.name}Properties);
-${this.name}.prototype.constructor = ${this.name};\n`;
+    this.str += `Object.setPrototypeOf(${this.name}.prototype, ${this.name}Properties);\n`;
   }
 };