Encapsulating in JavaScript, does it exist?

Question

I have an experience with the C# programming language, but I also have to work with the JS now and it\'s rather new for me.

I have tried to develop a simple class em

Answer 1

Javascript still does not support encapsulation out of the box. However there is a proposal to make it so.

ECMA TC39 had proposed a private syntax. According to the proposal, in order to make a javascript class field private you need to prefix it with a hash '#'. This is to provide some sort of runtime encapsulation.

Example:

class B {
  #hidden = 0;
  m() {
    return this.#hidden;
  }
}

Chrome supports this since Chrome v74. If this private-syntax becomes a standart we will be able to benefit from runtime encapsulation in javascript.