html - 倾斜或扭曲的边框形状

Question

我对是否可以使用 CSS 创建环绕(或者更准确地说是扭曲)边框感兴趣。我要达到的效果如图。

Answer 1

最简单和简洁的解决方案是使用 svg 来创建边框。

#container {
  position: relative;
  width: 200px;
  height: 30px;
}
#content {
  text-transform: uppercase;
  position: absolute;
  width: 200px;
  height: 30px;
  top: 0;
  text-align: center;
  line-height: 30px;
}

<div id="container">
  <svg width="200" height="30" viewBox="-1 -2 201 33">
    <path d="M0,0 h200 l-15,15 l15,15 h-200 l15,-15z" stroke="black" stroke-width="2" fill="none" />
  </svg>
  <div id="content">lorem ipsum</div>
</div>

---

您甚至可以使用二次曲线来增加一些曲线。

#container {
  position: relative;
  width: 200px;
  height: 30px;
  margin-bottom: 30px;
}
#content {
  text-transform: uppercase;
  position: absolute;
  width: 200px;
  height: 30px;
  top: 0;
  text-align: center;
  line-height: 30px;
}

<div id="container">
  <svg width="200" height="30" viewBox="-1 -1 201 33">
    <path d="M0,0 h200 q-20,15 0,30 h-200 q20,-15 0,-30" stroke="black" stroke-linejoin="round" stroke-width="2" fill="none" />
  </svg>
  <div id="content">lorem ipsum</div>
</div>

<div id="container">
  <svg width="200" height="30" viewBox="-1 -1 201 33">
    <path d="M0,0 h200 q0,10 -15,15 q10,0 15,15 h-200 q0,-10 15,-15 q-10,0 -15,-15" stroke="black" stroke-linejoin="round" stroke-width="2" fill="none" />
  </svg>
  <div id="content">lorem ipsum</div>
</div>

<div id="container">
  <svg width="200" height="30" viewBox="-1 -1 201 33">
    <path d="M0,0 h200 q-10,0 -15,12.5 l15,2.5 l-15,2.5 q0,10 15,13 h-200 q10,0 15,-12.5 l-15,-2.5 l15,-2.5 q0,-10 -15,-12.5" stroke="black" stroke-linejoin="round" stroke-width="2" fill="none" />
  </svg>
  <div id="content">lorem ipsum</div>
</div>

---

您可以轻松添加投影效果。

#container {
  position: relative;
  width: 200px;
  height: 30px;
  margin-bottom: 30px;
}
#content {
  text-transform: uppercase;
  position: absolute;
  width: 200px;
  height: 30px;
  top: 0;
  text-align: center;
  line-height: 30px;
}

<div id="container">
  <svg width="205" height="35" viewBox="-1 -1 205 38">
    <filter id="f">
      <feGaussianBlur stdDeviation="1.5" />
    </filter>
    <path filter="url(#f)" d="M0,0 h200 l-15,15 l15,15 h-200 l15,-15z" stroke="black" stroke-linejoin="round" stroke-width="2" transform="translate(0,3)" fill="black" />
    <path id="shape" d="M0,0 h200 l-15,15 l15,15 h-200 l15,-15z" stroke="black" stroke-linejoin="round" stroke-width="2" fill="white" />
  </svg>
  <div id="content">lorem ipsum</div>
</div>

<div id="container">
  <svg width="205" height="35" viewBox="-1 -1 205 38">
    <path filter="url(#f)" d="M0,0 h200 q0,10 -15,15 q10,0 15,15 h-200 q0,-10 15,-15 q-10,0 -15,-15" stroke="black" stroke-linejoin="round" stroke-width="2" transform="translate(0,3)" fill="black" />
    <path d="M0,0 h200 q0,10 -15,15 q10,0 15,15 h-200 q0,-10 15,-15 q-10,0 -15,-15" stroke="black" stroke-linejoin="round" stroke-width="2" fill="white" />
  </svg>
  <div id="content">lorem ipsum</div>
</div>

<div id="container">
  <svg width="205" height="35" viewBox="-1 -1 205 38">
    <path filter="url(#f)" d="M0,0 h200 q-10,0 -15,12.5 l15,2.5 l-15,2.5 q0,10 15,13 h-200 q10,0 15,-12.5 l-15,-2.5 l15,-2.5 q0,-10 -15,-12.5" stroke="black" stroke-linejoin="round" stroke-width="2" transform="translate(0,3)" fill="black" />
    <path d="M0,0 h200 q-10,0 -15,12.5 l15,2.5 l-15,2.5 q0,10 15,13 h-200 q10,0 15,-12.5 l-15,-2.5 l15,-2.5 q0,-10 -15,-12.5" stroke="black" stroke-linejoin="round" stroke-width="2" fill="white" />
  </svg>
  <div id="content">lorem ipsum</div>
</div>

---

或者，您始终可以使用 :after 和 :before :伪元素。

:after 和 :before 的 width 和 height :pseudo-elements 是使用一些计算出来的基本三 Angular 函数。

对面是:after和:before<的width和height/:伪元素。左边的一个被赋予上边框和右边框，右边的一个被赋予上边框和左边框。然后，左边的旋转 45deg，右边的旋转 -45deg。

div {
  position: relative;
  text-transform: uppercase;
  width: 200px;
  height: 30px;
  text-align: center;
  line-height: 27px;
  border-top: 3px solid black;
  border-bottom: 3px solid black;
  box-sizing: border-box;
}
div:after,
div:before {
  position: absolute;
  content: '';
  width: 21.21px;
  height: 21.21px;
  border-top: 3px solid black;
  border-right: 3px solid black;
  transform: rotate(45deg);
  box-sizing: border-box;
  top: 1px;
  left: -9px;
}
div:after {
  border-right: 0;
  border-left: 3px solid black;
  left: 100%;
  margin-left: -10px;
  transform: rotate(-45deg);
}

<div>lorem ipsum</div>