Question

在下面的代码中，有两个箭头指向我的SoMe div，只要页面未调整大小，这些箭头就会附加到边框上。

调整大小后，它将变成箭头和边框之间的空间。我希望可以将箭头添加为伪元素之前和之后，而不是使用媒体查询。但是当将箭头类更改为div.front-some:before和div.front-some:after时，我还没有使箭头显示出来。

这是完全有可能实现的，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 industry’s 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>

Answer 1

没有content: ''，不会出现伪选择器。

尝试以下方法。将出现红色箭头。

.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;
}

Answer 2

喜欢这个吗？

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 industry’s 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>

CSS箭头作为伪元素之前和之后

2 个答案: