html - Bootstrap 4个高度相同的嵌套行

Question

认为这个要求很简单:结果应该是一个非常基本的着陆页，其中包含两个主题。每个主题都有一个子主题。在移动设备上，应该只有一列连续包含 Topic1、Subtopic1、Topic2、Subtopic2。在桌面上，主题应并排显示，子主题应垂直对齐。

<div class="container-fluid">

<!-- Subtitles are on the same height but the order on mobile is wrong -->
    <div class="row">
        <div class="col-md-6">
            <h1>Topic 1</h1>
            <p>Four lines of text<br>Line2<br>Line3<br>Line4</p>
        </div>
        <div class="col-md-6">
            <h1>Topic 2</h1>
            <p>Two lines of text<br>Line2</p>
        </div>
    </div>

    <div class="row">
        <div class="col-md-6">
            <h2>Subtopic 1</h2>
            <p>Number of lines<br>do not matter</p>
        </div>
        <div class="col-md-6">
            <h2>Subtopic 2</h2>
            <p>But Subtopic 1 and Subtopic 2 should be<br>vertically aligned while >=md<br>and when <md, Subtopic 1 shold be below Topic 1, not below Topic 2</p>
        </div>
    </div>

<hr>

<!-- Display on mobile is correct but subtitles on desktop are not aligned anymore -->
    <div class="row">
        <div class="col-md-6">
            <h1>Topic 1</h1>
            <p>Four lines of text<br>Line2<br>Line3<br>Line4</p>
            <div class="row">
                <div class="col">
                    <h2>Subtopic 1</h2>
                    <p>Number of lines<br>do not matter</p>
                </div>
            </div>
        </div>
        <div class="col-md-6">
            <h1>Topic 2</h1>
            <p>Two lines of text<br>Line2</p>
            <div class="row">
                <div class="col">
                    <h2>Subtopic 2</h2>
                    <p>But Subtopic 1 and Subtopic 2 should be<br>vertically aligned while >=sm<br>and when <sm, Subtopic 1 shold be below Topic 1, not below Topic 2</p>
                </div>
            </div>
        </div>
    </div>

</div>

我很惊讶我不知道如何解决这个问题。非常感谢任何提示。

Answer 1

一种方法是使用来自 Bootstrap 的 order 实用程序类并调整所有元素的标记以使其处于同一级别:

<div class="container-fluid">
    <div class="row">
        <div class="order-0 order-md-0 col-md-6">
            <h1>Topic 1</h1>
            <p>Four lines of text<br>Line2<br>Line3<br>Line4</p>
        </div>
        <div class="order-2 order-md-1 col-md-6">
            <h1>Topic 2</h1>
            <p>Two lines of text<br>Line2</p>
        </div>
        <div class="order-1 order-md-2 col-md-6">
            <h2>Subtopic 1</h2>
            <p>Number of lines<br>do not matter</p>
        </div>
        <div class="order-3 order-md-3 col-md-6">
            <h2>Subtopic 2</h2>
            <p>But Subtopic 1 and Subtopic 2 should be<br>vertically aligned while &gt;=md<br>and when &lt;md, Subtopic 1
                    shold be below Topic 1, not below Topic 2</p> </div> </div> <hr>
        </div>
    </div>
</div>

查看文档 here .

另一种方法是为您的主题列设置预定义的固定高度，或者获取最高主题高度并在页面加载和窗口调整大小时使用 JavaScript 将其设置为所有其他高度。