[Javascript]Object_constructor

Constructor

• When we need to create many similar objects.
• They are named with capital letter first.
• They should be executed only with "new" operator.

function User(name) {
  // this = {};  (implicitly)
  this.name = name;

  this.sayHi = function() {
    alert( "My name is: " + this.name );
  };
  // return this;  (implicitly)
}

let john = new User("John");

john.sayHi(); // My name is: John

✔️ return with an object returns that object, in all other cases this is returned.