javascript - 如何在已选中的表中设置复选框？

Question

我有一个表，我有一个复选框的id，我想将其设置为选中状态，但我无法做到这一点，我也不知道为什么。

我尝试这样做，但没有任何反应，也没有任何类型的错误消息:

$('#medicalListTable input.type_checkbox[id="sindicate-345"]').prop('checked', true);
$('input.type_checkbox[id="sindicate-345"]').prop('checked', true);
$('input.type_checkbox[id="sindicate-345"]').attr('checked', true);

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table id="medicalListTable" class="display responsive nowrap dataTable no-footer" cellspacing="0" width="100%" role="grid" aria-describedby="medicalListTable_info" style="width: 100%;">
  <thead>
    <tr role="row">
      <th class="sorting ui-state-default sorting_asc" tabindex="0" aria-controls="medicalListTable" rowspan="1" colspan="1" aria-sort="ascending" aria-label="Id empleado: activate to sort column descending" style="width: 134px;">
        <div class="DataTables_sort_wrapper">Id empleado<span class="DataTables_sort_icon css_right ui-icon ui-icon-triangle-1-n"></span></div>
      </th>
      <th class="sorting ui-state-default" tabindex="0" aria-controls="medicalListTable" rowspan="1" colspan="1" aria-label="Nombre: activate to sort column ascending" style="width: 174px;">
        <div class="DataTables_sort_wrapper">Nombre<span class="DataTables_sort_icon css_right ui-icon ui-icon-caret-2-n-s"></span></div>
      </th>
      <th class="sorting ui-state-default" tabindex="0" aria-controls="medicalListTable" rowspan="1" colspan="1" aria-label="Apellidos: activate to sort column ascending" style="width: 329px;">
        <div class="DataTables_sort_wrapper">Apellidos<span class="DataTables_sort_icon css_right ui-icon ui-icon-caret-2-n-s"></span></div>
      </th>
      <th class="sorting ui-state-default" tabindex="0" aria-controls="medicalListTable" rowspan="1" colspan="1" aria-label="Seleccionar: activate to sort column ascending" style="width: 125px;">
        <div class="DataTables_sort_wrapper">Seleccionar<span class="DataTables_sort_icon css_right ui-icon ui-icon-caret-2-n-s"></span></div>
      </th>
    </tr>
  </thead>
  <tbody>
    <tr role="row" class="odd">
      <td class="vehicleId sorting_1">345</td>
      <td class="model">NAME</td>
      <td class="model">SURNAME</td>
      <td>
        <input type="checkbox" id="sindicate-345">
      </td>
    </tr>
  </tbody>
</table>

Answer 1

元素上没有 type_checkbox 类。我想您打算使用这样的属性选择器:

$('#medicalListTable input[type="checkbox"][id="sindicate-345"]').prop('checked', true);

但是，如果元素上有 id，它在 DOM 中应该是唯一的，因此这是您需要使用的唯一选择器:

$('#sindicate-345').prop('checked', true);

$('#sindicate-345').prop('checked', true);

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table id="medicalListTable" class="display responsive nowrap dataTable no-footer" cellspacing="0" width="100%" role="grid" aria-describedby="medicalListTable_info" style="width: 100%;">
  <thead>
    <tr role="row">
      <th class="sorting ui-state-default sorting_asc" tabindex="0" aria-controls="medicalListTable" rowspan="1" colspan="1" aria-sort="ascending" aria-label="Id empleado: activate to sort column descending" style="width: 134px;">
        <div class="DataTables_sort_wrapper">Id empleado<span class="DataTables_sort_icon css_right ui-icon ui-icon-triangle-1-n"></span></div>
      </th>
      <th class="sorting ui-state-default" tabindex="0" aria-controls="medicalListTable" rowspan="1" colspan="1" aria-label="Nombre: activate to sort column ascending" style="width: 174px;">
        <div class="DataTables_sort_wrapper">Nombre<span class="DataTables_sort_icon css_right ui-icon ui-icon-caret-2-n-s"></span></div>
      </th>
      <th class="sorting ui-state-default" tabindex="0" aria-controls="medicalListTable" rowspan="1" colspan="1" aria-label="Apellidos: activate to sort column ascending" style="width: 329px;">
        <div class="DataTables_sort_wrapper">Apellidos<span class="DataTables_sort_icon css_right ui-icon ui-icon-caret-2-n-s"></span></div>
      </th>
      <th class="sorting ui-state-default" tabindex="0" aria-controls="medicalListTable" rowspan="1" colspan="1" aria-label="Seleccionar: activate to sort column ascending" style="width: 125px;">
        <div class="DataTables_sort_wrapper">Seleccionar<span class="DataTables_sort_icon css_right ui-icon ui-icon-caret-2-n-s"></span></div>
      </th>
    </tr>
  </thead>
  <tbody>
    <tr role="row" class="odd">
      <td class="vehicleId sorting_1">345</td>
      <td class="model">NAME</td>
      <td class="model">SURNAME</td>
      <td>
        <input type="checkbox" id="sindicate-345">
      </td>
    </tr>
  </tbody>
</table>