javascript obtient un élément par classe
var elementsArray = document.getElementsByClassName("someclassname");
Grepper
var elementsArray = document.getElementsByClassName("someclassname");var elements = document.querySelector(".class");const whiteBoxes = document.getElementsByClassName("box-white")document.querySelector('#id-goes-here .class-goes-here');// HazaaZOOZ - javaScript- How to get element by id
// inside first element by class javascript
var targetDiv = document.getElementById("YourId").getElementsByClassName("YourClass")[0];
var targetDiv = document.getElementById("foo").getElementsByClassName("bar")[0];
targetDiv.textContent = "Goodbye world!";