Detailed explanation of the use of the clip-path property in CSS

body {
  background-color: #000;
}

.fa {
  border: 1px solid #fff;
  color:yellowgreen;
  padding: 10px;
  margin: 10px;
}

.fa>div {
  width: 110px;
  height: 110px;
  background-color: yellowgreen;
  margin: 20px auto;
}

.polygon1 {
  clip-path: polygon(50% 0px, 100% 100%, 0px 100%)
}

.polygon2 {
  clip-path: polygon(0px 50%, 50% 0, 100% 50%, 50% 100%)
}

.polygon3 {
  clip-path: polygon(0% 60%, 20% 0%, 60% 0%, 40% 60%)
}

<div class="fa">
  <p>polygon</p>
  <p>The value is composed of multiple coordinate points. The first value is in the x direction, and the second value is in the y direction. </p>
  <p>The upper left corner is the origin, and the lower right corner is the point (100%, 100%). </p>
  <div class="polygon1"></div>
  <div class="polygon2"></div>
  <div class="polygon3"></div>
</div> 

body {
  background-color: #000;
}

.fa {
  border: 1px solid #fff;
  color:yellowgreen;
  padding: 10px;
  margin: 10px;
}

.fa>div {
  width: 110px;
  height: 110px;
  background-color: yellowgreen;
  margin: 20px auto;
}

.circle1 {
  clip-path: circle(50% at 50% 50%)
}

.circle2 {
  clip-path: circle(70% at 50% 50%)
}

.circle3 {
  clip-path: circle(30% at 10% 10%)
}

<div class="fa">
  <p>circle</p>
  <p>The value consists of a coordinate point and a radius. </p>
  <p>The upper left corner is the origin, and the lower right corner is the point (100%, 100%). </p>
  <p>When defining the radius, you can use the at keyword to define the coordinates. </p>
  <div class="circle1"></div>
  <div class="circle2"></div>
  <div class="circle3"></div>
</div> 

body {
  background-color: #000;
}

.fa {
  border: 1px solid #fff;
  color:yellowgreen;
  padding: 10px;
  margin: 10px;
}

.fa>div {
  width: 110px;
  height: 110px;
  background-color: yellowgreen;
  margin: 20px auto;
}

.ellipse1 {
  clip-path: ellipse(30% 20% at 50% 50%)
}

.ellipse2 {
  clip-path: ellipse(20% 30% at 50% 50%)
}

.ellipse3 {
  clip-path: ellipse(60% 10% at 10% 10%)
}

<div class="fa">
  <p>ellipse</p>
  <p>The value consists of the x-axis radius of the ellipse, the y-axis radius, and the coordinates of the positioning ellipse. </p>
  <p>The upper left corner is the origin, and the lower right corner is the point (100%, 100%). </p>
  <p>The at keyword separates the radius from the coordinates</p>
  <div class="ellipse1"></div>
  <div class="ellipse2"></div>
  <div class="ellipse3"></div>
</div>

body {
  background-color: #000;
}

.fa {
  border: 1px solid #fff;
  color:yellowgreen;
  padding: 10px;
  margin: 10px;
}

.fa>div {
  width: 110px;
  height: 110px;
  background-color: yellowgreen;
  margin: 20px auto;
}

.inset1 {
  clip-path: inset(25% 0% 25% 0% round 0% 25% 0% 25%)
}

.inset2 {
  clip-path: inset(0% 25% 25% 0% round 25% 25% 25% 0%)
}

.inset3 {
  clip-path: inset(25% 25% 0% 0% round 0% 25% 0% 25%)
}

<div class="fa">
  <p>inset</p>
  <p>The value is (top right bottom left round top left radius top right radius bottom right radius bottom left radius)</p>
  <p>The value before round indicates the distance. If the first value is 25%, it means that the image is drawn starting from 25% on the top</p>
  <div class="inset1"></div>
  <div class="inset2"></div>
  <div class="inset3"></div>
</div>