JSFiddle - React, Tailwind, and code Playground

by Bright RYMER

HTML

<div class="alert alert-success" id="UserName">Nom utilisateur valide</div>

JavaScript

$(function() {
  
  function adaptDivAlert() {
      if($("#UserName") != null) {
        $("#UserName").css("color", "red");
    }
   }
});