ES6 Classes & Constructors

What characteristic does the 'title' property have in this class?

class Task {
  constructor(title, isCompleted = false) {
    Object.defineProperty(this, 'title', {
      value: title,
      writable: false,
      enumerable: true
    });
    this.isCompleted = isCompleted;
  }
}

It's mutable
It's immutable
The 'title' property is immutable because: 1) It's defined with writable: false, 2) This prevents the property from being changed after creation, 3) Attempting to change it won't throw an error but will silently fail in non-strict mode, 4) It remains enumerable so it will show up in loops and Object.keys(), 5) This is a way to create read-only properties in classes, 6) This pattern is useful for properties that should not change during an object's lifetime.
It's private
It's a computed property

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