Bootstrap：Accordian一開始沒有崩潰

Question

我正在使用以下代碼進行折疊，問題是它在開始時沒有折疊，請您幫我如何將其折疊直到單擊。

我從Codepen獲得了代碼

<script>
    $(document).ready(function() {

        $(".toggle-accordion").on("click", function() {
            var accordionId = $(this).attr("accordion-id"),
            numPanelOpen = $(accordionId + ' .collapse.in').length; 
            $(this).toggleClass("active"); 

        })  
    });
</script>


<style>
    .panel-body{
        padding:10px;
        font-size:15px;
    }
    input[type="checkbox"] {
        margin-right: 12px !important;
    }
    .col-sm-4{
        margin-bottom:40px;
    }
    .leftindent{
        margin-left:30px;
    }
    .panel-default>.panel-heading {
        color: #333;
        background-color: #fff;
        border-color: #e4e5e7;
        padding: 0;
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
    }

    .panel-default>.panel-heading a {
        display: block;
        padding: 10px 15px;
    }

    .panel-default>.panel-heading a:after {
        content: "";
        position: relative;
        top: 1px;
        display: inline-block;
        font-family: 'Glyphicons Halflings';
        font-style: normal;
        font-weight: 400;
        line-height: 1;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        float: right;
        transition: transform .25s linear;
        -webkit-transition: -webkit-transform .25s linear;
    }

    .panel-default>.panel-heading a[aria-expanded="true"] {
        background-color: #eee;
    }

    .panel-default>.panel-heading a[aria-expanded="true"]:after {
        content: "\2212";
        -webkit-transform: rotate(180deg);
        transform: rotate(180deg);
    }

    .panel-default>.panel-heading a[aria-expanded="false"]:after {
        content: "\002b";
        -webkit-transform: rotate(90deg);
        transform: rotate(90deg);
    }

    .accordion-option {
        width: 100%;
        float: left;
        clear: both;
        margin: 15px 0;
    }

    .accordion-option .title {
        font-size: 20px;
        font-weight: bold;
        float: left;
        padding: 0;
        margin: 0;
    }

    .accordion-option .toggle-accordion {
        float: right;
        font-size: 16px;
        color: #6a6c6f;
    }

    .accordion-option .toggle-accordion:before {
        content: "Expand All";
    }

    .accordion-option .toggle-accordion.active:before {
        content: "Collapse All";
    }

</style>

以下是html代碼。

   <div class="panel-group" id="accordion" role="tablist" aria-multiselectable="true">
     <div class="panel panel-default">
      <div class="panel-heading" role="tab" id="headingOne">
         <h4 class="panel-title">
          <a role="button" data-toggle="collapse" data-parent="#accordion" href="#cookiesandbiscotti" aria-expanded="true" aria-controls="collapseOne">
                                            4 Cookies &amp; Biscotti
                                        </a>
                                    </h4>
                                </div>
     <div id="cookiesandbiscotti" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingOne">
        <div class="panel-body">
        <?php foreach($mincookines as $value):?>
           <div class="form-group"><input type="checkbox"><?= $value;?></div>
         <?php endforeach;?>
     </div>
    </div>
    </div>
  </div>

Answer 1

我為您提供解決方案。 您需要刪除in從類class="panel-collapse collapse in" ，這樣它可以在正常狀態。 並將aria-expanded="true"為false 。 它將為您工作。 在這里您可以看到更新的代碼筆

碼

<div class="container">
  <div class="accordion-option">
    <h3 class="title">Lorem Ipsum</h3>
    <a href="javascript:void(0)" class="toggle-accordion active" accordion-id="#accordion"></a>
  </div>
  <div class="clearfix"></div>
  <div class="panel-group" id="accordion" role="tablist" aria-multiselectable="true">
    <div class="panel panel-default">
      <div class="panel-heading" role="tab" id="headingOne">
        <h4 class="panel-title">
        <a role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseOne" aria-expanded="false" aria-controls="collapseOne">
          Collapsible Group Item #1
        </a>
      </h4>
      </div>
      <div id="collapseOne" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingOne">
        <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>
    <div class="panel panel-default">
      <div class="panel-heading" role="tab" id="headingTwo">
        <h4 class="panel-title">
        <a class="collapsed" role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
          Collapsible Group Item #2
        </a>
      </h4>
      </div>
      <div id="collapseTwo" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingTwo">
        <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>
    <div class="panel panel-default">
      <div class="panel-heading" role="tab" id="headingThree">
        <h4 class="panel-title">
        <a class="collapsed" role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
          Collapsible Group Item #3
        </a>
      </h4>
      </div>
      <div id="collapseThree" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingThree">
        <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>
  </div>
</div>

Answer 2

請刪除in類形式DIV ID cookiesandbiscotti 。

Answer 3

刪除類“ in”，或者如果您想打開第一項，也添加第一項

Answer 4

從class="panel-collapse collapse in"刪除in類，您可以開始了。