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css箭头作为前后伪元素[重复]

pseudo-element css html

Fjott · 技术社区 · 6 年前

在我下面的代码中,我有两个箭头指向我的somediv,只要页面没有调整大小,箭头就会附着到边框上。

调整大小后,它将成为箭头和边框之间的一个空格。我希望我可以添加箭头作为前后伪元素,而不是使用媒体查询。但我还没有设法在将arrow类更改为时显示箭头 div.front-some:before div.front-some:after .

这是可能实现的,还是媒体查询是我唯一的选择?

  body {
	  background: green;
	}

	h1.title {
	  color: red;
	  text-align: center;
	  text-transform: uppercase;
	  letter-spacing: 20px;
	  background: green;
	  max-width: 70%;
	  margin: -40px auto 0 auto;
	}

	div.inner {
	  border: 4px solid red;
	  color: #fff;
	  padding: 15px 50px 50px 50px;
	  margin-top: 100px;
	  box-sizing: content-box;
	}

	div.some {
	  text-align: center;
	  background: green;
	  max-width: 40%;
	  margin: 0 auto -60px auto;
	}

	.arrow-right {
	  border-right: 5px solid red;
	  border-bottom: 5px solid red;
	  width: 25px;
	  height: 25px;
	  transform: rotate(-45deg);
	  margin-bottom: -25px;
	  margin-left: 26.5%;
	}

	.arrow-left {
	  border-left: 5px solid red;
	  border-top: 5px solid red;
	  width: 25px;
	  height: 25px;
	  transform: rotate(-45deg);
	  margin-top: 37px;
	  margin-right: 26.5%;
	  float: right;
	}

<div class="inner">


  <h1 class="title">Hello World</h1>


  <p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industryâs standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It
    has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop
    publishing software like Aldus PageMaker including versions of Lorem Ipsum.</p>
  <br>

  <div class="arrow-right"></div>
  <div class="some"> SoMe

  </div>
  <!-- .social-icons -->
  <div class="arrow-left"></div>


</div>

2 回复 | 直到 6 年前

Dirk 6 年前

body {
  background: green;
}

h1.title {
  color: red;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 20px;
  background: green;
  max-width: 70%;
  margin: -40px auto 0 auto;
}

div.inner {
  border: 4px solid red;
  color: #fff;
  padding: 15px 50px 50px 50px;
  margin-top: 100px;
  box-sizing: content-box;
}

div.some {
  text-align: center;
  background: green;
  max-width: 40%;
  margin: 0 auto -60px auto;
  position: relative;
}

div.some::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  display: block;
  border-right: 5px solid red;
  border-bottom: 5px solid red;
  width: 25px;
  height: 25px;
  transform: translate(-50%, -50%) rotate(-45deg);
}

div.some::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  display: block;
  border-left: 5px solid red;
  border-top: 5px solid red;
  width: 25px;
  height: 25px;
  float: right;
  transform: translate(50%, -50%) rotate(-45deg);
}

<div class="inner">


  <h1 class="title">Hello World</h1>


  <p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industryâs standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It
    has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop
    publishing software like Aldus PageMaker including versions of Lorem Ipsum.</p>
  <br>


  <div class="some"> SoMe

  </div>


</div>

Josh Kelly 6 年前

content: '' .

尝试以下方法。红色箭头将出现。

.arrow-left:before {
  border-left: 5px solid red;
  border-top: 5px solid red;
  width: 25px;
  content: '';
  height: 25px;
  transform: rotate(-45deg);
  margin-top: 37px;
  margin-right: 26.5%;
  float: right;
}