JSFiddle - React, Tailwind, and code Playground
by Damien M
HTML
<div id="menu">
<div class="item">
<span>Élément 1</span>
<span>Élément 2</span>
</div>
<div class="publicite">
<span>Élément 3</span>
<span>Élément 4</span>
</div>
</div>
<div id="contenu">
<span>Introduction au contenu de la page...</span>
</div>
JavaScript
var query = document.querySelector('#menu .item span'),
queryAll = document.querySelectorAll('#menu .item span');
alert(query.innerHTML); // Affiche : "Élément 1"
alert(queryAll.length); // Affiche : "2"
alert(queryAll[0].innerHTML + ' - ' + queryAll[1].innerHTML); // Affiche : "Élément 1 - Élément 2"