JSFiddle - React, Tailwind, and code Playground
HTML
<select>
<option>Valor 1</option>
<option>Valor 2</option>
<option>Valor 3</option>
</select>
<select>
<option>Teste 1</option>
<option>Teste 2</option>
<option>Teste 3</option>
</select>JavaScript
$('select').change(function(){
var ddl = $(this);
var title = ddl.find("option:selected").text();
ddl.prop('title', title);
console.log(title);
});