单击select2后显示水平小节

<select id="mySelect2">
  <option value="section1">Section 1</option>
  <option value="section2">Section 2</option>
  <option value="section3">Section 3</option>
</select>
<div id="sectionContainer"></div>

// 初始化select2插件
$('#mySelect2').select2();

// 监听选择事件
$('#mySelect2').on('select2:select', function (e) {
  var selectedSection = e.params.data.id;
  showSection(selectedSection);
});

// 显示水平小节
function showSection(section) {
  var sectionContent = '';

  // 根据选择的选项生成对应的水平小节内容
  switch (section) {
    case 'section1':
      sectionContent = 'This is section 1.';
      break;
    case 'section2':
      sectionContent = 'This is section 2.';
      break;
    case 'section3':
      sectionContent = 'This is section 3.';
      break;
    default:
      sectionContent = 'No section selected.';
  }

  // 将水平小节内容插入到页面中
  $('#sectionContainer').html(sectionContent);
}