bootstrap 4响应实用程序可见/隐藏的xs sm lg不起作用

问题描述

在迁移到 Bootstrap 4 时，新的响应实用程序隐藏/可见类出现问题.我知道.hidden-类已从v3中删除并替换为 .hidden-*-up .hidden-*-down.使用新的.hidden-*-up.hidden-*-down类，但元素未更改为可见/隐藏.不知道为什么.

Having an issue with the new responsive utilities hidden / visible classes, when migrating to Bootstrap 4. I am aware that .hidden- classes have been removed from v3 and replaced with .hidden-*-up .hidden-*-down. Using the new .hidden-*-up.hidden-*-down classes but the elements aren't changing to visible/hidden. Can't figure out why.

<div class="col hidden-xs-down">
    <span class="vcard">
        …
    </span>
</div>
<div class="col hidden-lg-down">
    <div class="hidden-sm-down">
                …
    </div>
    <div class="hidden-xs-down">
                …
    </div>
</div>

* 在此示例中，屏幕大小(Safari，自适应设计模式)均不隐藏任何内容

推荐答案

使用Bootstrap 4 .hidden-* 类已完全删除(是的，它们已由hidden-*-*替换，但这些类也已消失来自v4 alphas).

With Bootstrap 4 .hidden-* classes were completely removed (yes, they were replaced by hidden-*-* but those classes are also gone from v4 alphas).

从v4-beta开始，您可以组合.d-*-none和.d-*-block类以达到相同的结果.

Starting with v4-beta, you can combine .d-*-none and .d-*-block classes to achieve the same result.

可见-*也已删除；不要使用显式的.visible-*类，而应通过不隐藏元素来使其可见(再次，使用.d-none .d-md-block的组合).这是工作示例:

visible-* was removed as well; instead of using explicit .visible-* classes, make the element visible by not hiding it (again, use combinations of .d-none .d-md-block). Here is the working example:

<div class="col d-none d-sm-block">
    <span class="vcard">
        …
    </span>
</div>
<div class="col d-none d-xl-block">
    <div class="d-none d-md-block">
                …
    </div>
    <div class="d-none d-sm-block">
                …
    </div>
</div>

class="hidden-xs"变为class="d-none d-sm-block"(或 d-done d-sm-inline-block )...

<span class="d-none d-sm-inline">hidden-xs</span>

<span class="d-none d-sm-inline-block">hidden-xs</span>

Bootstrap 4响应实用程序的示例:

<div class="d-none d-sm-block"> hidden-xs
  <div class="d-none d-md-block"> visible-md and up (hidden-sm and down)
    <div class="d-none d-lg-block"> visible-lg and up  (hidden-md and down)
      <div class="d-none d-xl-block"> visible-xl </div>
    </div>
  </div>
</div>

<div class="d-sm-none"> eXtra Small <576px </div>
<div class="d-none d-sm-block d-md-none d-lg-none d-xl-none"> SMall ≥576px </div>
<div class="d-none d-md-block d-lg-none d-xl-none"> MeDium ≥768px </div>
<div class="d-none d-lg-block d-xl-none"> LarGe ≥992px </div>
<div class="d-none d-xl-block"> eXtra Large ≥1200px </div>

<div class="d-xl-none"> hidden-xl (visible-lg and down)
  <div class="d-lg-none d-xl-none"> visible-md and down (hidden-lg and up)
    <div class="d-md-none d-lg-none d-xl-none"> visible-sm and down  (or hidden-md and up)
      <div class="d-sm-none"> visible-xs </div>
    </div>
  </div>
</div>

• codepen.io/_yatko/pen/ZJXQxy
• codepen.io/_yatko/pen/ZJXQxy

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