如何使元素达到最大高度而不会导致页面滚动？

Question

我有一个对话框：

$(document).ready(function() {
  $('.ui.modal').modal('show');
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/fomantic-ui@2.7.6/dist/semantic.min.css" rel="stylesheet"/>
<script src="https://cdn.jsdelivr.net/npm/fomantic-ui@2.7.6/dist/semantic.min.js"></script>


<div class="ui overlay fullscreen modal">
  <div class="header">
    Dialog box
  </div>
  <div class="content">
    <div class="ui warning message">
      <div class="header">
        Be careful
      </div>
      This is a warning message
    </div>
    <div style="background-color: blueviolet">This is the container.<br />This is the container.</div>
  </div>
  <div class="actions">
    <div class="ui approve button">Save</div>
    <div class="ui cancel button">Cancel</div>
  </div>
</div>

我希望紫色 div（上面写着 "This is the container" 的）在不使页面滚动的情况下具有最大的高度，如下所示：

我试过使用 height:100%，但它没有任何作用。如何在不使用高度像素值的情况下获得图片中的结果？

Answer 1

使容器 (.content) 成为列方向的弹性容器。

将 flex: 1 添加到紫色框。

将此添加到您的 CSS:

.ui.modal > .content {
    display: flex;
    flex-direction: column;
}

.ui.modal > .content > div:last-child {
    flex: 1;
}

$(document).ready(function() {
  $('.ui.modal').modal('show');
});

.ui.modal > .content {
    display: flex !important;
    flex-direction: column;
}

.ui.modal > .content > div:last-child {
    flex: 1;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/fomantic-ui@2.7.6/dist/semantic.min.css" rel="stylesheet"/>
<script src="https://cdn.jsdelivr.net/npm/fomantic-ui@2.7.6/dist/semantic.min.js"></script>


<div class="ui overlay fullscreen modal">
  <div class="header">
    Dialog box
  </div>
  <div class="content">
    <div class="ui warning message">
      <div class="header">
        Be careful
      </div>
      This is a warning message
    </div>
    <div style="background-color: blueviolet">This is the container.<br />This is the container.</div>
  </div>
  <div class="actions">
    <div class="ui approve button">Save</div>
    <div class="ui cancel button">Cancel</div>
  </div>
</div>

如何使元素达到最大高度而不会导致页面滚动？

How do I make an element be the maximum height it can be without causing the page to scroll?

css

height

flexbox