Question

div中的高度为100％iframe，父级显示Y滚动。为什么会溢出？

.root{
  position:absolute;
  height:100%;
  width:100%
}
iframe {
  pointer-events: all;
  width: 100%;
  height: 100%;
  border: 0;
  overflow-y: hidden !important;
  overflow-x: hidden !important;
  overflow: hidden;
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.2/css/bootstrap.min.css" rel="stylesheet"/>

<div class="d-flex flex-column root">
  <div style="background:yellow">
  Head
  </div>
  <div class="flex-grow-1 overflow-auto">
    <iframe frameborder="0" allowfullscreen src="https://www.portotheme.com/"></iframe>
  </div>
</div>

iframe设置为height：100％。为什么父级显示滚动条？ JSFiddle。

Answer 1

添加到 root 类的 overflow-y 属性中。也就是说，overflow-y: hidden;

.root{
  overflow-y: hidden;
}

HTML的更改

<div class="d-flex flex-column root">
  <div style="background:yellow">
  Head
  </div>
  <div class="h-100">
    <iframe frameborder="0" allowfullscreen src="https://www.portotheme.com/"></iframe>
  </div>
</div>

Flex栏，子iframe高度为100％，显示父级滚动

1 个答案:

`Codepen demo`

`JSFiddle demo`