JSFiddle - React, Tailwind, and code Playground

HTML

<script>
   function alteraTitulo(id) {
      var ddl = document.getElementById(id);
      var title = ddl.options[ddl.selectedIndex].text;
       ddl.title = title;
    }
 </script>

<select id="ddlTeste" onchange='alteraTitulo("ddlTeste")'>
<option>Valor 1</option>
<option>Valor 2</option>
<option>Valor 3</option>
</select>

<select id="ddlTeste1" onchange='alteraTitulo("ddlTeste1")'>
<option>Teste 1</option>
<option>Teste 2</option>
<option>Teste 3</option>
</select>