如何使用select2在JS中接收来自html的选择

<select id="mySelect">
  <option value="option1">选项1</option>
  <option value="option2">选项2</option>
  <option value="option3">选项3</option>
</select>

$(document).ready(function() {
  $('#mySelect').select2();
});

var selectedValue = $('#mySelect').val();
console.log(selectedValue);

$('#mySelect').on('change', function() {
  var selectedValue = $(this).val();
  console.log(selectedValue);
  // 执行其他操作
});