query selector js

element = document.querySelector(sélecteurs);

//Pretend there is a <p> with class "example"
const myParagraph = document.querySelector('.example');
//You can do many this with is
myParagraph.textContent = 'This is my new text';

var el = document.querySelector(".myclass");

 document.querySelector("#demo").innerHTML = "Hello World!";

 

element = document.querySelector(selectores);

document.querySelectorAll