html input select css code example

Example 1: html form select

<!-- O segundo valor estará selecionado inicialmente -->
<select name="select">
  <option value="valor1">Valor 1</option> 
  <option value="valor2" selected>Valor 2</option>
  <option value="valor3">Valor 3</option>
</select>

Example 2: how to add a selection in css

*, *:after, *:before {
     box-sizing: border-box;
}