html - 证明内容 flex-end 不适用于 IE

Question

Flex-end 适用于 chrome 和 firefox，但不适用于 ie，请执行以下代码

.flex-container {  display: flex;
  flex-wrap: nowrap;
  background-color: DodgerBlue;    flex-direction: column;flex-flow:column;
      justify-content: flex-end;height:100px
}

<h1>Flexible Boxes</h1>

<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
  <div>4</div>
  <div>5</div>
  <div>6</div>  
  <div>7</div>
  <div>8</div>
</div>

<p>Try to resize the browser window.</p>
<p>A container with "flex-wrap: nowrap;" will never wrap its items.</p>
<p><strong>Note:</strong> Flexbox is not supported in Internet Explorer 10 or earlier versions.</p>

Answer 1

IE 似乎使用 justify-content 当出现溢出时 以不同方式对齐元素。它不仅发生在 flex-end 上，使用 center 时也会遇到同样的情况。任何会造成顶部溢出的值都不会按预期工作。

在行方向也会发生。任何会产生左溢出的属性都将不起作用。

对齐无效的示例:

.container {
  display:inline-flex;
  height:50px;
  width:50px;
  margin:50px;
  border:2px solid green;
}
.container span {
  flex-shrink:0;
  width:200%;
  background:red;
}

.alt {
  flex-direction:column;
}

.alt span {
  height:200%;
  width:auto;
}

<div class="container" style="justify-content:flex-end;">
  <span></span>
</div> 

<div class="container" style="justify-content:center;">
  <span></span>
</div>

<div class="container alt" style="justify-content:flex-end;">
  <span></span>
</div>

<div class="container alt" style="justify-content:center;">
  <span></span>
</div>

我很惊讶这么说，但似乎 IE 在这些情况下做得很好，因为它防止了不必要的溢出，这可能会产生如本问题 Centered flex-container grows beyond top 中所述的问题。还有这个Can't scroll to top of flex item that is overflowing container

考虑到这一点，很难说这是不是一个错误。这可能是设计使然，IE 团队决定避免不良 溢出。 ¹

---

这就是说，这里有一个hack，它使用了一些负边距，可以让您在 IE 上获得所需的行为:

.flex-container {
  display: flex;
  flex-wrap: nowrap;
  background-color: DodgerBlue;
  flex-direction: column;
  flex-flow: column;
  justify-content: flex-end;
  height: 100px
}
.flex-container > div:first-child {
  margin-top:-100vh; /*put a very big margin here*/
}

<h1>Flexible Boxes</h1>

<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <div>5</div>
  <div>6</div>
  <div>7</div>
  <div>8</div>
</div>

同样的技巧适用于前面的例子:

.container {
  display:inline-flex;
  height:50px;
  width:50px;
  margin:50px;
  border:2px solid green;
}
.container span {
  flex-shrink:0;
  width:200%;
  background:red;
}

.alt {
  flex-direction:column;
}

.alt span {
  height:200%;
  width:auto;
}

<div class="container" style="justify-content:flex-end;">
  <span style="margin-left:-100%;"></span>
</div> 

<div class="container" style="justify-content:center;">
  <span style="margin: 0 -100%;"></span>
</div>

<div class="container alt" style="justify-content:flex-end;">
  <span style="margin-top:-100%;"></span>
</div>

<div class="container alt" style="justify-content:center;">
  <span style="margin:-100% 0;"></span>
</div>

^{1:我暂时没有任何官方证明。}