JAVASCRIPT

jquery clear select 2

$('select2element').val(null).trigger("change")

jquery select clear options

$('#mySelect')
    .find('option')
    .remove()
    .end()
    .append('<option value="whatever">text</option>')
    .val('whatever')
;

reset select2 jquery | clear select2 option value

$("ClassOrIDName").trigger("change");