delete js

let person = {
  firstname: 'John',
  lastname: 'Doe'
}

console.log(person.firstname);
// expected output: "John"

delete person.firstname;

console.log(person.firstname);
// expected output: undefined// delete an element from the dom
var elem = document.querySelector('#some-element');
elem.parentNode.removeChild(elem);


// keep element in dom
var elem = document.querySelector('#some-element');
elem.style.display = 'none';var ourDog = {
  "name": "Camper",
  "legs": 4,
  "tails": 1,
  "friends": ["everything!"],
  "bark": "bow-wow"
};

delete ourDog.bark;delete obj.firstname;let monTableauAssociatif = {
     'prenom' : 'Mark' ,
     'nom'    : 'Zuckerberg' , 
     'poste'  : 'Pdg de Facebook',

 } ;
 delete(monTableauAssociatif.poste)
 console.log(monTableauAssociatif) ;