[英]Target a specific data-target button when using several Bootstrap collapse elements?
我在我的网站上使用了几个引导折叠元素。 折叠元素由阅读更多按钮控制,其中有一个图标,该图标根据折叠元素的 state 变化。 我通过向按钮添加 class 来实现这一点。 问题是 class 添加到所有按钮。 如何将 class 仅添加到特定的折叠元素按钮?
这是代码:
<div class="collapse extra-text" id="collapse1">
<p class="">Hidden text</p>
</div>
<p>
<a class="read-more" data-bs-toggle="collapse" data-bs-target="#collapse1" aria-expanded="false" aria-controls="collapseExample">Read more </a>
</p>
我正在使用的 js:
<script>
$('.extra-text').on('hidden.bs.collapse', function () {
$('.read-more').removeClass('active');
});
$('.extra-text').on('shown.bs.collapse', function () {
$('.read-more').addClass('active');
});
</script>
css:
a.read-more:after {
font-family: "Font Awesome 5 Free";
content: "\f078";
display: inline-block;
transition: all 0.5s;
}
a.read-more.active:after {
-webkit-transform: rotate(180deg);
-moz-transform: rotate(180deg);
transform: rotate(180deg);
}
您可以使用.prev()
和.find()
方法从折叠 div 访问前一个元素,然后在那里添加/删除 class 。
演示代码:
$('.extra-text').on('hidden.bs.collapse', function(e) { //get prev elements > p tag and then use.find to get readmore tag $(this).prev().find('a.read-more').removeClass('active'); }); $('.extra-text').on('shown.bs.collapse', function(e) { $(this).prev().find('a.read-more').addClass('active'); });
a.read-more::after { font-family: "Font Awesome 5 Free"; content: "\f078"; display: inline-block; transition: all 0.5s; font-weight: 900; } a.read-more.active:after { -webkit-transform: rotate(180deg); -moz-transform: rotate(180deg); transform: rotate(180deg); }
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.4.1/css/all.css"> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BmbxuPwQa2lc/FVzBcNJ7UAyJxM6wuqIj61tLrc4wSX0szH/Ev+nYRRuWlolflfl" crossorigin="anonymous"> <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.6.0/dist/umd/popper.min.js" integrity="sha384-KsvD1yqQ1/1+IA7gi3P0tyJcT3vR+NdBTt13hSJ2lnve8agRGXTTyNaBYmCR/Nwi" crossorigin="anonymous"></script> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/js/bootstrap.min.js" integrity="sha384-nsg8ua9HAw1y0W1btsyWgBklPnCUAFLuTMS2G72MMONqmOymq585AcH49TLBQObG" crossorigin="anonymous"></script> <p> <a class="read-more" data-bs-toggle="collapse" data-bs-target="#collapse1" aria-expanded="false" aria-controls="collapseExample">Read more </a> </p> <div class="collapse extra-text" id="collapse1"> <p class="">Hidden text</p> </div> <p> <a class="read-more" data-bs-toggle="collapse" data-bs-target="#collapse2" aria-expanded="false" aria-controls="collapseExample">Read more </a> </p> <div class="collapse extra-text" id="collapse2"> <p class="">Hidden text</p> </div>
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