javascript - 选择选项后无法使用 jQuery 禁用输入元素

Question

我为此使用了jquery 3.4.1我试图在选择不同的值时禁用输入元素。

$(document).ready(function() {
  $('form input[name="spouseName"]').prop("disabled", true);
  $('form input[name="children"]').prop("disabled", true);
  $("form select option [value='married']").change(function() {
    $('form input[name="spouseName"]').prop("disabled", false);
    $('form input[name="children"]').prop("disabled", false);
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<form>
  <select class="form-control" name="maritalStatus" id="maritalStatus">
    <option value="Married">Married</option>
    <option selected value="UnMarried">UnMarried</option>
    <option value="Male Widow">Male Widow</option>
    <option value="FeMale Widow">FeMale Widow</option>
    <option value="Divorcee">Divorcee</option>
  </select>
  <input type="text" class="form-control" name="spouseName" id="spouseName" aria-describedby="spName" placeholder="Spose Name">
  <input type="text" class="form-control" name="children" id="children" aria-describedby="childrens" placeholder="Children">
</form>

Answer 1

在发生change事件时，您应该检查所选选项的值。另外，要删除该属性，您可以使用 .removeAttr() .

尝试以下方法:

$(document).ready(function(){
  $('form input[name="spouseName"]').prop("disabled", true);
  $('form input[name="children"]').prop("disabled", true);

  $("form select").change(function(){
    if($(this).val() == 'Married'){
      $('form input[name="spouseName"]').removeAttr("disabled")
      $('form input[name="children"]').removeAttr("disabled")
    }
    else{
      $('form input[name="spouseName"]').prop("disabled", true);
      $('form input[name="children"]').prop("disabled", true);
    }
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form>
  <select class="form-control" name="maritalStatus" id="maritalStatus">
    <option value="Married">Married</option>
    <option selected value="UnMarried">UnMarried</option>
    <option value="Male Widow">Male Widow</option>
    <option value="FeMale Widow">FeMale Widow</option>
    <option value="Divorcee">Divorcee</option>
  </select>
  <input type="text" class="form-control" name="spouseName" id="spouseName" aria-describedby="spName" placeholder="Spose Name">
  <input type="text" class="form-control" name="children" id="children" aria-describedby="childrens" placeholder="Children">
</form>