select2 selected value jquery code example
Example 1: jquery select2 set value
<select id="lang" >
<option value="1">php</option>
<option value="2">asp</option>
<option value="3">java</option>
</select>
<script>
$("#lang").select2().select2('val','1');
</script>
Example 2: jquery select2 multiple select all
$("#checkbox").click(function(){
if($("#checkbox").is(':checked') ){
$("select > option").prop("selected","selected");
}else{
$("select > option").removeAttr("selected");
}
});