javascript - Bootstrap : accordian not collpased in beginning

Question

我正在使用下面的代码来制作 Accordion ，问题是它一开始没有折叠，请你帮我看看它是如何折叠的，直到被点击

我从 codepen 得到代码

<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>

下面是html代码。

   <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

我有适合您的解决方案。您需要从 class="panel-collapse collapse in" 中删除 in 类，以便它可以处于正常状态。并将 aria-expanded="true" 设为 false 。它会为你工作。在这里您可以看到更新的 codepen

代码

<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>