jquery select2 set value

1<select id="lang" >
2   <option value="1">php</option>
3   <option value="2">asp</option>
4   <option value="3">java</option>
5</select>
6
7<script>
8	$("#lang").select2().select2('val','1');
9</script>

1$('#mySelect').select2({
2  data: ['one','two'],
3  tags: true
4});
5$('#mySelect').val(['one','two']).trigger('change')

1var options = [];
2$.each(dataReturn, function (i, obj) {
3    //console.log(i);
4    //console.log(obj);
5    options.push({
6        text: obj.NickName,
7        id: obj.NickName
8    });
9})
10$("#BeneType").empty().select2({
11    data: options
12});

1$('#select2')
2    .select2()
3    .on('select2:open', () => {
4        $(".select2-results:not(:has(a))").append('<a href="#" style="padding: 6px;height: 20px;display: inline-table;">Create new item</a>');
5})
6

1var initQuantitiesDropdown = function () {
2    var options = [];
3    var selectedFruit = $("#fruits").val();
4    $.each(pageData.products[selectedFruit].quantities, function (key, value) {
5        options.push({
6            text: value,
7            id: key
8        });
9    })
10    $("#quantities").empty().select2({
11        data: options
12    });
13};
14
15$("#fruits").select2().change(initQuantitiesDropdown);
16initQuantitiesDropdown();

1SELECT2 V4 :
2============
3For select2 v4 you can append directly an option/s as follow:
4
5<select id="myMultipleSelect2" multiple="" name="myMultipleSelect2[]">
6    <option value="TheID" selected="selected">The text</option>                                                                   
7</select>
8
9Or with JQuery:
10---------------
11
12var $newOption = $("<option selected='selected'></option>").val("TheID")
13					.text("The text")
14 
15$("#myMultipleSelect2").append($newOption).trigger('change');
16
17other example :
18---------------
19
20$("#myMultipleSelect2").val(5).trigger('change');