jQueryUI selectmenu-禁用/启用选择，如果另一个选择已选择某些选项

Question

对于这个问题，我使用的是official example的稍微修改的版本。

如果从选择菜单“选择速度”中选择的选项不是Fast，我会尝试停用选择菜单“选择标题”。 如果选择了Fast，则应该再次激活选择。

尝试：

$( function() {

  $( "#speed" ).selectmenu();
  $( "#salutation" ).selectmenu();
  
  $speed = $('#speed');
  $salutation = $('#salutation');
  test();
  

  $speed.on('selectmenuchange', function() {
	    test();
  });

  
  function test()
  {
      let selectedOption = $speed.find('option:selected').text().trim().toLowerCase();

      if ( ! selectedOption.includes('fast')) {
        $salutation.prop('disabled', 'disabled');
      } else {
        $salutation.removeAttr('disabled');

        $salutation.next().find('.ui-selectmenu-text').trigger("click");
      }
  }
  
});

fieldset {
  border: 0;
}
label {
  display: block;
  margin: 30px 0 0 0;
}
.overflow {
  height: 200px;
}

#

<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
  <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>


 
<div class="demo">
 
<form action="#">
 
  <fieldset>
    <label for="speed">Select a speed</label>
    <select name="speed" id="speed">
      <option>Slower</option>
      <option>Slow</option>
      <option selected="selected">Medium</option>
      <option>Fast</option>
      <option>Faster</option>
    </select>
  
    <label for="salutation">Select a title</label>
    <select name="salutation" id="salutation">
      <option disabled selected>Please pick one</option>
      <option>Mr.</option>
      <option>Mrs.</option>
      <option>Dr.</option>
      <option>Prof.</option>
      <option>Other</option>
    </select>
  </fieldset>
</form>
</div>

但是如您所见，它无法按预期运行。任何提示都欢迎。

Jsfiddle

Answer 1

我找到了解决方案。我必须将函数test()更改为此：

  function test()
  {
      let selectedOption = $speed.find('option:selected').text().trim().toLowerCase();

      //Hide
      if ( ! selectedOption.includes('fast')) {
        $salutation.selectmenu('disable');
      } else {
        $salutation.selectmenu('enable');
      }
  }

$( function() {

  $( "#speed" ).selectmenu();
  $( "#salutation" ).selectmenu();
  
  
  
  $speed = $('#speed');
  $salutation = $('#salutation');
  test();
  

  $speed.on('selectmenuchange', function() {
	    test();
  });

  
  function test()
  {
      let selectedOption = $speed.find('option:selected').text().trim().toLowerCase();

      //Hide
      if ( ! selectedOption.includes('fast')) {
        $salutation.selectmenu('disable');
      } else {
        $salutation.selectmenu('enable');
      }
  }
  
});

fieldset {
  border: 0;
}
label {
  display: block;
  margin: 30px 0 0 0;
}
.overflow {
  height: 200px;
}

  <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
  <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>


 
<div class="demo">
 
<form action="#">
 
  <fieldset>
    <label for="speed">Select a speed</label>
    <select name="speed" id="speed">
      <option>Slower</option>
      <option>Slow</option>
      <option selected="selected">Medium</option>
      <option>Fast</option>
      <option>Faster</option>
    </select>
  
    <label for="salutation">Select a title</label>
    <select name="salutation" id="salutation">
      <option disabled selected>Please pick one</option>
      <option>Mr.</option>
      <option>Mrs.</option>
      <option>Dr.</option>
      <option>Prof.</option>
      <option>Other</option>
    </select>
  </fieldset>
</form>
</div>