使用溢出时不可见伪元素

时间：2019-06-26 02:40:58

标签： html css pseudo-element

我正在尝试使用伪元素before在溢出div中使用竖线：

.comments:before {
  width: 3px;
  top: -20px;
  bottom: -20px;
  background: rgba(0,0,0,0.1);
}

在演示中可以看到的问题是，竖线仅在div的可见部分中创建。预期结果是整个div中的竖线，即使在隐藏部分也是如此。

.comments {
  overflow: auto;
  height: 200px;
}

.comment {
  overflow: hidden;
  padding: 0 0 1em;
  margin: 0 0 1em;
  *zoom: 1;
}

.comment-img {
  float: left;
  margin-right: 33px;
  border-radius: 5px;
  overflow: hidden;
}

.comment-img img {
  display: block;
}

.comment-body {
  overflow: hidden;
}

.comment .text {
  padding: 10px;
  border: 1px solid #e5e5e5;
  border-radius: 5px;
  background: #fff;
}

.comment .text p:last-child {
  margin: 0;
}

.comment .attribution {
  margin: 0.5em 0 0;
  font-size: 14px;
  color: #666;
}


/* Decoration */

.comments,
.comment {
  position: relative;
}

.comments:before,
.comment:before,
.comment .text:before {
  content: "";
  position: absolute;
  top: 0;
  left: 65px;
}

.comments:before {
  width: 3px;
  top: -20px;
  bottom: -20px;
  background: rgba(0, 0, 0, 0.1);
}

.comment:before {
  width: 9px;
  height: 9px;
  border: 3px solid #fff;
  border-radius: 100px;
  margin: 16px 0 0 -6px;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2), inset 0 1px 1px rgba(0, 0, 0, 0.1);
  background: #ccc;
}

.comment:hover:before {
  background: orange;
}

.comment .text:before {
  top: 18px;
  left: 78px;
  width: 9px;
  height: 9px;
  border-width: 0 0 1px 1px;
  border-style: solid;
  border-color: #e5e5e5;
  background: #fff;
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
}

​
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">

<section class="comments">
  <article class="comment">
    <a class="comment-img" href="#non">
      <img src="https://pbs.twimg.com/profile_images/444197466133385216/UA08zh-B.jpeg" alt="" width="50" height="50">
    </a>
    <div class="comment-body">
      <div class="text">
        <p>Hello, this is an example from me</p>
      </div>
      <p class="attribution">by <a href="#non">Besnik Hetemi</a> at 14:23pm, 4 Dec 2015</p>
    </div>
  </article>
  <article class="comment">
    <a class="comment-img" href="#non">
      <img src="https://pbs.twimg.com/profile_images/444197466133385216/UA08zh-B.jpeg" alt="" width="50" height="50">
    </a>
    <div class="comment-body">
      <div class="text">
        <p>if you are interested for more about me visited my profile on social page</p>
        <p>To visit me you can click my name <a target="_blank" href="http://www.facebook.com/besnik.hetemii">Besnik Hetemi</a> and send me frends request or send me a message in inbox</p>
      </div>
      <p class="attribution">by <a href="#non">Besnik Hetemi</a> at 14:23pm, 4 Dec 2015</p>
    </div>
  </article>
  <article class="comment">
    <a class="comment-img" href="#non">
      <img src="https://pbs.twimg.com/profile_images/444197466133385216/UA08zh-B.jpeg" alt="" width="50" height="50">
    </a>
    <div class="comment-body">
      <div class="text">
        <p>if you are interested for more about me visited my profile on social page</p>
        <p>To visit me you can click my name <a target="_blank" href="http://www.facebook.com/besnik.hetemii">Besnik Hetemi</a> and send me frends request or send me a message in inbox</p>
      </div>
      <p class="attribution">by <a href="#non">Besnik Hetemi</a> at 14:23pm, 4 Dec 2015</p>
    </div>
  </article>
  <article class="comment">
    <a class="comment-img" href="#non">
      <img src="https://pbs.twimg.com/profile_images/444197466133385216/UA08zh-B.jpeg" alt="" width="50" height="50">
    </a>
    <div class="comment-body">
      <div class="text">
        <p>if you are interested for more about me visited my profile on social page</p>
        <p>To visit me you can click my name <a target="_blank" href="http://www.facebook.com/besnik.hetemii">Besnik Hetemi</a> and send me frends request or send me a message in inbox</p>
      </div>
      <p class="attribution">by <a href="#non">Besnik Hetemi</a> at 14:23pm, 4 Dec 2015</p>
    </div>
  </article>
  <article class="comment">
    <a class="comment-img" href="#non">
      <img src="https://pbs.twimg.com/profile_images/444197466133385216/UA08zh-B.jpeg" alt="" width="50" height="50">
    </a>
    <div class="comment-body">
      <div class="text">
        <p>if you are interested for more about me visited my profile on social page</p>
        <p>To visit me you can click my name <a target="_blank" href="http://www.facebook.com/besnik.hetemii">Besnik Hetemi</a> and send me frends request or send me a message in inbox</p>
      </div>
      <p class="attribution">by <a href="#non">Besnik Hetemi</a> at 14:23pm, 4 Dec 2015</p>
    </div>
  </article>
  <article class="comment">
    <a class="comment-img" href="#non">
      <img src="https://pbs.twimg.com/profile_images/444197466133385216/UA08zh-B.jpeg" alt="" width="50" height="50">
    </a>
    <div class="comment-body">
      <div class="text">
        <p>if you are interested for more about me visited my profile on social page</p>
        <p>To visit me you can click my name <a target="_blank" href="http://www.facebook.com/besnik.hetemii">Besnik Hetemi</a> and send me frends request or send me a message in inbox</p>
      </div>
      <p class="attribution">by <a href="#non">Besnik Hetemi</a> at 14:23pm, 4 Dec 2015</p>
    </div>
  </article>
</section>

View on JSFiddle

1 个答案:

答案 0 :(得分：1)

您可以为wrapper元素添加一个comments元素，并在该元素上应用垂直条 pseudo元素。现在，您可以通过将comments元素设置为flexbox来使竖线和wrapper部分的高度相等（默认align-items: stretch将使高度相等）。

请参见下面的演示（更改以内联方式标记）：

.comments {
  overflow: auto;
  height: 200px;
}

.comment {
  overflow: hidden;
  padding: 0 0 1em;
  margin: 0 0 1em;
  *zoom: 1;
}

.comment-img {
  float: left;
  margin-right: 33px;
  border-radius: 5px;
  overflow: hidden;
}

.comment-img img {
  display: block;
}

.comment-body {
  overflow: hidden;
}

.comment .text {
  padding: 10px;
  border: 1px solid #e5e5e5;
  border-radius: 5px;
  background: #fff;
}

.comment .text p:last-child {
  margin: 0;
}

.comment .attribution {
  margin: 0.5em 0 0;
  font-size: 14px;
  color: #666;
}


/* Decoration */

.comments,
.comment {
  position: relative;
}

.comments:before,
.comment:before,
.comment .text:before {
  content: "";
  position: absolute;
  top: 0;
  left: 65px;
}

.wrapper {
  /* added */
  display: flex;
}


/* .comments:before changed to this */

.wrapper:before {
  content: '';
  width: 3px;
  background: rgba(0, 0, 0, 0.1);
  position: relative;
  left: 65px;
}

.comment:before {
  width: 9px;
  height: 9px;
  border: 3px solid #fff;
  border-radius: 100px;
  margin: 16px 0 0 -6px;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2), inset 0 1px 1px rgba(0, 0, 0, 0.1);
  background: #ccc;
}

.comment:hover:before {
  background: orange;
}

.comment .text:before {
  top: 18px;
  left: 78px;
  width: 9px;
  height: 9px;
  border-width: 0 0 1px 1px;
  border-style: solid;
  border-color: #e5e5e5;
  background: #fff;
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
}
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<section class="wrapper"> <!-- <-- new wrapper container -->
  <section class="comments">
    <article class="comment">
      <a class="comment-img" href="#non">
        <img src="https://pbs.twimg.com/profile_images/444197466133385216/UA08zh-B.jpeg" alt="" width="50" height="50">
      </a>
      <div class="comment-body">
        <div class="text">
          <p>Hello, this is an example from me</p>
        </div>
        <p class="attribution">by <a href="#non">Besnik Hetemi</a> at 14:23pm, 4 Dec 2015</p>
      </div>
    </article>
    <article class="comment">
      <a class="comment-img" href="#non">
        <img src="https://pbs.twimg.com/profile_images/444197466133385216/UA08zh-B.jpeg" alt="" width="50" height="50">
      </a>
      <div class="comment-body">
        <div class="text">
          <p>if you are interested for more about me visited my profile on social page</p>
          <p>To visit me you can click my name <a target="_blank" href="http://www.facebook.com/besnik.hetemii">Besnik Hetemi</a> and send me frends request or send me a message in inbox</p>
        </div>
        <p class="attribution">by <a href="#non">Besnik Hetemi</a> at 14:23pm, 4 Dec 2015</p>
      </div>
    </article>
    <article class="comment">
      <a class="comment-img" href="#non">
        <img src="https://pbs.twimg.com/profile_images/444197466133385216/UA08zh-B.jpeg" alt="" width="50" height="50">
      </a>
      <div class="comment-body">
        <div class="text">
          <p>if you are interested for more about me visited my profile on social page</p>
          <p>To visit me you can click my name <a target="_blank" href="http://www.facebook.com/besnik.hetemii">Besnik Hetemi</a> and send me frends request or send me a message in inbox</p>
        </div>
        <p class="attribution">by <a href="#non">Besnik Hetemi</a> at 14:23pm, 4 Dec 2015</p>
      </div>
    </article>
    <article class="comment">
      <a class="comment-img" href="#non">
        <img src="https://pbs.twimg.com/profile_images/444197466133385216/UA08zh-B.jpeg" alt="" width="50" height="50">
      </a>
      <div class="comment-body">
        <div class="text">
          <p>if you are interested for more about me visited my profile on social page</p>
          <p>To visit me you can click my name <a target="_blank" href="http://www.facebook.com/besnik.hetemii">Besnik Hetemi</a> and send me frends request or send me a message in inbox</p>
        </div>
        <p class="attribution">by <a href="#non">Besnik Hetemi</a> at 14:23pm, 4 Dec 2015</p>
      </div>
    </article>
    <article class="comment">
      <a class="comment-img" href="#non">
        <img src="https://pbs.twimg.com/profile_images/444197466133385216/UA08zh-B.jpeg" alt="" width="50" height="50">
      </a>
      <div class="comment-body">
        <div class="text">
          <p>if you are interested for more about me visited my profile on social page</p>
          <p>To visit me you can click my name <a target="_blank" href="http://www.facebook.com/besnik.hetemii">Besnik Hetemi</a> and send me frends request or send me a message in inbox</p>
        </div>
        <p class="attribution">by <a href="#non">Besnik Hetemi</a> at 14:23pm, 4 Dec 2015</p>
      </div>
    </article>
    <article class="comment">
      <a class="comment-img" href="#non">
        <img src="https://pbs.twimg.com/profile_images/444197466133385216/UA08zh-B.jpeg" alt="" width="50" height="50">
      </a>
      <div class="comment-body">
        <div class="text">
          <p>if you are interested for more about me visited my profile on social page</p>
          <p>To visit me you can click my name <a target="_blank" href="http://www.facebook.com/besnik.hetemii">Besnik Hetemi</a> and send me frends request or send me a message in inbox</p>
        </div>
        <p class="attribution">by <a href="#non">Besnik Hetemi</a> at 14:23pm, 4 Dec 2015</p>
      </div>
    </article>
  </section>
</section> <!-- new wrapper container ends-->

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