Boostrap 4 崩溃：标题和徽章不在同一行

Question

考虑这个 boostrap 4 崩溃（ https://codepen.io/jaysarf/pen/xxKNKvX ）：

<div class="card">
<h5 class="card-header">
    <a data-toggle="collapse" href="#collapse-example" aria-expanded="true" aria-controls="collapse-example" id="heading-example" class="d-block">
        <i class="fa fa-chevron-down fa-pull-right"></i>This is a loooooooooooooooooooooooooooooooooooooooong collapsible title<span class="ml-1 my-1 badge badge-success float-right">This is a pretty loooooong badge text</span>
    </a>
</h5>
<div id="collapse-example" class="collapse show" aria-labelledby="heading-example" style="">
    <div class="card-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>

我希望标题和徽章在同一行，但前提是标题在一行。 我非常接近实现我想要的，但无论我尝试什么，总是有问题。 任何帮助将不胜感激。

好的：在此处输入图片描述

好的：在此处输入图片描述

不行：在此处输入图像描述

好的：在此处输入图片描述

非常感谢。 对不起我的英语...

Answer 1

可以通过flexbox来实现。

HTML 结构需要稍作改动：

<h5 class="card-header">
    <a data-toggle="collapse" href="#collapse-example" aria-expanded="true" 
        aria-controls="collapse-example" class="card-header-collapse">
        <span class="card-header-title">
            This is a loooooooooooooooooooooooooooooooooooooooong collapsible title
        </span>
        <span class="card-header-badge">
            <span class="badge badge-success">This is a pretty loooooong badge text</span>
            <i class="fa fa-chevron-down"></i>
        </span>
    </a>
</h5>

然后您可以应用 CSS 使.card-header-collapse成为flexbox ：

.card-header-collapse {
    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
}

.card-header-badge {
    margin-left: auto;
}

演示： https://jsfiddle.net/davidliang2008/avrp6j9f/8/

截图