Edit fiddle - JSFiddle - React, Tailwind, and code Playground

JSFiddle - React, Tailwind, and code Playground

HTML

<select size="1" name="Empresa" id="Empresa" onchange="opcao()">
  <option value="">Selecione...</option>
  <option value="1">Html</option>
  <option value="2">PHP</option>
  <option value="3">CSS</option>
  <option value="4">Javascript</option>
</select>


<script>
	function opcao(){
  var x = document.getElementById("Empresa").selectedIndex;
  
  if (x != ''){
  	alert(x);
  }
}
</script>

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