JSFiddle - React, Tailwind, and code Playground

HTML

<div class="rubrique">rubrique</div>
<div class="rubrique">rubrique</div>
<div class="pagemenu">pagemenu</div>

JavaScript

var x = document.querySelectorAll ('div.rubrique, div.pagemenu');
console.log(x);

x.forEach(function(y) {
	console.log( y );
  y.innerHTML = 'test';
});