JAVASCRIPT

javascript function as class new private

// 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"

js class private

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

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

js es6 class private method

class MyClass
{
  	// Prepend hash to make it private. Browser support at:
  	//	https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/Private_class_fields#browser_compatibility
    // Dynamic access (ie: this.#[fieldName]) is disallowed by design.
  	#myPrivateMethod() {
    	// do private things
	}
}

private class members javascript

class Person {
    constructor(name) {
        var _name = name
        this.setName = function(name) { _name = name; }
        this.getName = function() { return _name; }
    }
}