line | stretch -->
      <p>.item { flex: flex-grow [flex-shrink] [flex-basis]; } </p>
      <table id="flexBasis">
         <tr>
            <td>elemento 1</td>
            <td>elemento 2</td>
         </tr>
         <tr>
            <td><input type="number" class="flex-basis" id="B1" min="0" value="50" ><label for="B1">flex-basis %</label></td>
            <td><input type="number" class="flex-basis" id="B2" min="0" value="50" ><label for="B2">flex-basis %</label></td>
         </tr>
         <tr>
        