如何在不使用 z-index 的情况下将一个项目隐藏在另一个项目下

How to hide an item under another item without using z-index

我在我的网站上使用此代码:https://codepen.io/dustindowell/pen/GgeWep?editors=1100

我需要隐藏在邮件正文下方的尾巴,如下所示:https://codepen.io/haygt/pen/KKPMBOL?editors=1100

但是我不能用z-index: -1;

因为,在那种情况下,尾巴完全消失了(我正在使用 vuetify,很可能它会覆盖 z-index,我不能使用负值)。

所以我尝试这样做:https://codepen.io/haygt/pen/eYOzyLv?editors=1100

但是如您所见,它不起作用,那么我该怎么做才能将绿尾隐藏在邮件正文下方?

更新:

要保持​​位置,请像我使用的那样用容器包裹它bubble-container

*,
*::before,
*::after {
  margin: 0;
  border: 0;
  padding: 0;
  word-wrap: break-word;
  box-sizing: border-box;
}

body {
  font-size: 1.5em;
  margin: 1em;
  background-color: rgba(8, 36, 64, 0.0625);
}


/* MIXIN STARTS HERE */


/* Requires LifeSaver Sass mixin linked externally */

.bubble-center {
  position: relative;
  display: flex;
  justify-content: center;
}

.bubble-right {
  position: relative;
  display: flex;
  justify-content: flex-end;
}

.bubble-left {
  position: relative;
  display: flex;
  justify-content: flex-start;
}

.bubble {
  margin: 0.25em;
  min-height: 1em;
  padding: 0.25em 0.75em;
  position: relative;
  border-radius: 0.5em;
  line-height: 1.5;
  color: white;
  background-color: dodgerblue;
  z-index: 10;
}

.tail {
  display: block;
  width: 0.75em;
  height: 0.5em;
  position: absolute;
  right: 0.1em;
  bottom: 0;
  border-left: 0.5em solid green;
  border-bottom-left-radius: 100%;
  z-index: 1;
}

.bubble-container {
  position: relative;
}
<div class="bubble-right">
  <div class="bubble-container">
    <div class="bubble">
      <p>The default bubble.</p>
    </div>
    <div class="tail"></div>
  </div>
</div>

<div class="bubble-left">
  <div class="bubble-container">
    <div class="bubble">
      <p>The default bubble.</p>
    </div>
    <div class="tail"></div>
  </div>
</div>

<div class="bubble-center">
  <div class="bubble-container">
    <div class="bubble">
      <p>The default bubble.</p>
    </div>
    <div class="tail"></div>
  </div>
</div>


您可以使用常规 div 而不是 ::before 来实现,因为您不能使用 z-index:-1.

*,
*::before,
*::after {
  margin: 0;
  border: 0;
  padding: 0;
  word-wrap: break-word;
  box-sizing: border-box;
}

body {
  font-size: 1.5em;
  margin: 1em;
  background-color: rgba(8, 36, 64, 0.0625);
}


/* MIXIN STARTS HERE */


/* Requires LifeSaver Sass mixin linked externally */

.bubble-center {
  text-align: right;
  position: relative;
}

.bubble {
  display: inline-block;
  margin: 0.25em;
  min-height: 1em;
  padding: 0.25em 0.75em;
  position: relative;
  border-radius: 0.5em;
  line-height: 1.5;
  color: white;
  background-color: dodgerblue;
  z-index: 10;
}

.tail {
  display: block;
  width: 0.75em;
  height: 0.5em;
  position: absolute;
  right: 0.1em;
  bottom: 0;
  border-left: 0.5em solid green;
  border-bottom-left-radius: 100%;
  z-index: 1;
}
<div class="bubble-center">
  <div class="bubble">
    <p>The default bubble.</p>
  </div>
  <div class="tail"></div>
</div>

哈巴狗

.bubble-center
  .bubble
    p The default bubble.
  .tail

You might need to convert this CSS to SCSS