我无法通过多边形变换获得形状

Question

我在为li制作形状时遇到问题，我需要它具有对角线和平滑的边框，但我无法理解。这就是我现在得到的。

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  list-style-position: inside;
  display:flex;
}
li {
  position: relative;
  height: 40px;
  width: 300px;
  margin: 10px;
  padding-right: 30px;
  line-height: 40px;
  text-align: right;
  text-transform: uppercase;
  border-radius: 8px;
  background: crimson;
  color: white;
  -webkit-clip-path: polygon(0% 0%, 0% 50%, 10% 100%, 100% 100%, 100% 50%, 90% 0%);
  clip-path: polygon(0% 0%, 0% 50%, 10% 100%, 100% 100%, 100% 50%, 90% 0%);
}

<ul>
  <li>Menu Text 1</li>
  <li>Menu Text 2</li>
  <li>Menu Text 3</li>
</ul>

我需要这样的东西

Answer 1

您正在寻找偏斜变换而不是剪切路径：

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  list-style-position: inside;
  display: flex;
}

li {
  position: relative;
  z-index: 0;
  height: 40px;
  padding:0 20px;
  margin: 10px;
  line-height: 40px;
  text-align: right;
  text-transform: uppercase;
  color: white;
}

li::before {
  content: "";
  position: absolute;
  z-index:-1;
  top: 0;
  left: 50%;
  right: 0;
  bottom: 0;
  transform: skew(15deg); /* use negative value to have the other direction */
  transform-origin:bottom; /* use top with negative value*/
  border-radius: 0 8px 8px 0;
  background: crimson;
}
li::after {
  content: "";
  position: absolute;
  z-index:-1;
  top: 0;
  left: 0;
  right: 50%;
  bottom: 0;
  border-radius: 8px 0 0 8px;
  background: crimson;
}

<ul>
  <li>Menu Text 1</li>
  <li>Menu Text 2</li>
  <li>Menu Text 3</li>
</ul>