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javascript function as class new private

Mark Flynn 
class Something {
  #property;

  constructor(){
    this.#property = "test";
  }

  #privateMethod() {
    return 'hello world';
  }

  getPrivateMessage() {
      return this.#privateMethod();
  }
}

const instance = new Something();
console.log(instance.property); //=> undefined
console.log(instance.privateMethod); //=> undefined
console.log(instance.getPrivateMessage()); //=> hello worl
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4
8
Hafiz 80 points 

                                    class ClassWithPrivateField {
  #privateField;
  
  constructor() {
    this.#privateField = 42;
    this.#randomField = 666; # Syntax error
  }
}

const instance = new ClassWithPrivateField();
instance.#privateField === 42; // Syntax error

4 (8 Votes)
0
4.5
4
Wapiti 95 points 

                                    // Javascript Function that behaves as class, with private variables
function Person(name){
    const birth = new Date();
    this.greet = () => `Hello my name is ${name}. I was born at ${birth.toISOString()}`;
}

const joe = new Person("Joe");
joe.greet(); // Hello my name is Joe. I was born at 2021-04-09T21:12:33.098Z
// The birth variable is "inaccessible" from outside so "private"

4.5 (4 Votes)
0
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