如何在摺疊/摺疊時更改Bootstrap手風琴標題

Question

當所有面板摺疊時，背景顏色應爲白色。面板打開時，面板標題背景顏色應爲灰色。我該怎麼做，請嗎？

 <div class="panel panel-simple"> 
     <div class="panel-heading" role="tab" id="headingOneMaintenance"> 
      <h4 class="panel-title"> 
      <a class="accordion-toggle" role="button" data-toggle="collapse" data-parent="#accordionMaintenance" href="#collapseOneMaintenance" aria-expanded="true" aria-controls="collapseOneMaintenance"> 
       What will you do to prepare my apartment before I move in? 
      </a> 
      </h4> 
     </div> 
     <div id="collapseOneMaintenance" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingOneMaintenance"> 
      <div class="panel-body"> 
      Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. 
      </div> 
     </div> 
     </div> 

有了這個CSS，我所有的面板是白色的，但是當面板打開，我想報頭是灰色的：

.panel-heading { 
    background-color: white;} 

它不必雖然是這個CSS。謝謝！

Answer 1

你可以做一個小的黑客.accordion-toggle與CSS利潤率&補白涵蓋所有面板尺寸：

摘錄如下：

.accordion-toggle { 
 
    background-color: gray; 
 
    display: block; 
 
    padding: 10px; 
 
    margin: -10px -15px; 
 
    border-top-left-radius: 4px; 
 
    border-top-right-radius: 4px; 
 
} 
 

 
.accordion-toggle.collapsed { 
 
    background-color: white; 
 
}

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" /> 
 
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script> 
 
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> 
 
<div class="panel panel-simple"> 
 
    <div class="panel-heading" role="tab" id="headingOneMaintenance"> 
 
    <h4 class="panel-title"> 
 
     <a class="accordion-toggle" role="button" data-toggle="collapse" data-parent="#accordionMaintenance" href="#collapseOneMaintenance" aria-expanded="true" aria-controls="collapseOneMaintenance"> 
 
     What will you do to prepare my apartment before I move in? 
 
     </a> 
 
    </h4> 
 
    </div> 
 
    <div id="collapseOneMaintenance" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingOneMaintenance"> 
 
    <div class="panel-body"> 
 
     Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird 
 
     on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw 
 
     denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. 
 
    </div> 
 
    </div> 
 
</div>

Answer 2

試試這個代碼：

$(document).on('click', '.panel-heading', function(){ 
 
    $('.panel-heading').css('background-color', 'grey'); 
 
    if ($(this).find('.accordion-toggle').hasClass('collapsed')) { 
 
     $(this).css('background-color', 'white'); 
 
    } 
 

 
})

.panel-heading { 
 
    background-color: grey;}

<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.css"> 
 
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> 
 
<div class="panel panel-simple"> 
 
    <div class="panel-heading" role="tab" id="headingOneMaintenance"> 
 
    <h4 class="panel-title"> 
 
     <a class="accordion-toggle" role="button" data-toggle="collapse" data-parent="#accordionMaintenance" href="#collapseOneMaintenance" aria-expanded="true" aria-controls="collapseOneMaintenance"> 
 
     What will you do to prepare my apartment before I move in? 
 
     </a> 
 
    </h4> 
 
    </div> 
 
    <div id="collapseOneMaintenance" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingOneMaintenance"> 
 
    <div class="panel-body"> 
 
     Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. 
 
    </div> 
 
    </div> 
 
</div>