how get the value of data info when selected option

Question

how get value of data-info (@Libelle) in javascript when selected option

<select id="selectVal">
<option>1</option>
<option>2</option>
</select>
<div data-info="@Libelle"></div>

<script>
...
</script>

Answer 1

Use a change event, use data() to get the value:

$('#selectVal').change(function() {
 var info =  $('[data-info]').data('info');
 alert(info);
});