Flexbox无法在< button>元素 [英] Flexbox not working on <button> element in some browsers

问题描述

我试图用flexbox的 justify-content：center < button> c>。但Safari不会使它们居中。我可以应用相同的样式任何其他标签，它的工作原理（参见< p> -tag）。只有按钮左对齐。

尝试Firefox或Chrome，您可以看到差异。

有没有任何用户代理风格我不得不覆盖？或此问题的任何其他解决方案？

  div {display：flex; flex-direction：column; width：100％;} button，p {display：flex; flex-direction：row; justify-content：center;}  

 < div& < button> < span>测试< / span> < span>测试< / span> < / button> < p> < span>测试< / span> < span>测试< / span> < / p>< / div>  

：
http://jsfiddle.net/z3sfwtn2/2/

< button> 元素在某些浏览器中不能是flex容器。

根据浏览器的不同，某些HTML元素不会接受 display 更改。其中三个元素是：

• < button>


• < fieldset>


• < legend>

这个想法是在为HTML元素设计样式时保持常识。例如，该规则阻止作者将字段集转换为表。

但是，在这种情况下有一个简单的解决方法：

解决方案：将按钮的内容包含在 ，并使 span flex容器。




已调整的HTML （包含按钮内容 span ）

 < div> 
< button> 
< span><！ - 使用div也可以，但是无效HTML  - > 
< span>测试< / span> 
< span>测试< / span> 
< / span> 
< / button> 
< p> 
< span> Test< / span> 
< span>测试< / span> 
< / p> 
< / div> 
  

调整的CSS （目标 span ）

 按钮> span，p {
 display：flex; 
 flex-direction：row; 
 justify-content：center; 
} 
  

修订版演示

注意：虽然不能使用flex容器，但按钮

参考文献：

$
b $ b
• Bug 984869 - display：flex不适用于按钮元素


• 错误1176786 - Flexbox阻止了内容，但没有建立flex格式化上下文

I'm trying to center inner elements of a <button>-tag with flexbox's justify-content: center. But Safari does not center them. I can apply the same style to any other tags and it works as intended (see the <p>-tag). Only the button is left-aligned.

Try Firefox or Chrome and you can see the difference.

Is there any user agent style I have to overwrite? Or any other solution to this problem?

div {
  display: flex;
  flex-direction: column;
  width: 100%;
}
button, p {
  display: flex;
  flex-direction: row;
  justify-content: center;
}

<div>
  <button>
    <span>Test</span>
    <span>Test</span>
  </button>
  <p>
    <span>Test</span>
    <span>Test</span>
  </p>
</div>

And a jsfiddle: http://jsfiddle.net/z3sfwtn2/2/

解决方案

The problem is that the <button> element cannot be a flex container in some browsers.

Depending on the browser, certain HTML elements will not accept display changes. Three of these elements are:

• <button>
• <fieldset>
• <legend>

The idea is to maintain a level of common sense when styling HTML elements. For instance, the rule prevents authors from turning a fieldset into a table.

However, there is an easy workaround in this case:

Solution: Wrap the content of the button in a span, and make the span the flex container.

Adjusted HTML (wrapped button content in a span)

<div>
    <button>
        <span><!-- using a div also works but is not valid HTML -->
            <span>Test</span>
            <span>Test</span>
        </span>
    </button>
    <p>
        <span>Test</span>
        <span>Test</span>
    </p>
</div>

Adjusted CSS (targeted span)

button > span, p {
    display: flex;
    flex-direction: row;
    justify-content: center;
}

Revised Demo

NOTE: Although they cannot be flex containers, button elements can be flex items.

References:

• Bug 984869 - display: flex doesn't work for button elements
• Bug 1176786 - Flexbox on a blockifies the contents but doesn't establish a flex formatting context

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