Slot pribadi baru dan dapat dibuat melalui metode dan aksesor pribadi

// ES2022
class MyClass {
  #privateMethod() {}
  static check() {
    const inst = new MyClass();

    console.log(#privateMethod in inst) // output-> true

    console.log(#privateMethod in MyClass.prototype) // output-> false

    console.log(#privateMethod in MyClass) // output-> false
  }
}
MyClass.check();
Puzzled Puffin