引用这里
http://t.zoukankan.com/yhhBKY-p-12196510.html
<div class="row-1">clip-path:我是row-1</div> <div class="row-2">我是row-2</div> <div class="row-3"> <div>clip-path:我是row-3</div> </div> <div class="row-4">我是row-4</div> <div class="row-5">我是row-5</div>
.row-1{
margin: 20px auto;
width: 200px;
height: 50px;
color: #fff;
line-height: 50px;
text-align: center;
background: teal;
/* 箭头靠右边 */
clip-path: polygon(0 0, 88% 0, 88% 35%, 95% 50%, 88% 65%, 88% 100%, 0 100%);
/* 箭头靠下边 */
/* clip-path: polygon(0 0, 100% 0, 100% 85%,35% 85%, 30% 100%,25% 85%,0% 85%); */
/* 箭头靠左边 */
/* clip-path: polygon(5% 0, 100% 0, 100% 100%,5% 100%, 5% 65%,0 50%,5% 35%); */
/* 箭头靠下边 */
/* clip-path: polygon(0 15%, 25% 15%, 30% 0,35% 15%, 100% 15%,100% 100%,0% 100%); */
border: 1px solid teal;
}
.row-2{
margin: 20px auto;
position: relative;
width: 200px;
height: 50px;
color: #fff;
line-height: 50px;
text-align: center;
border: 1px solid teal;
border-radius: 5px;
background: teal;
}
.row-2::after{
content: '';
position: absolute;
width: 0;
height: 0;
/* 箭头靠右边 */
top: 13px;
right: -10px;
border-top: 10px solid transparent;
border-bottom: 10px solid transparent;
border-left: 10px solid teal;
/* 箭头靠下边 */
/* left: 25px;
bottom: -10px;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-top: 10px solid teal; */
/* 箭头靠左边 */
/* top: 13px;
left: -10px;
border-top: 10px solid transparent;
border-bottom: 10px solid transparent;
border-right: 10px solid teal; */
/* 箭头靠下边 */
/* top: -10px;
left: 25px;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-bottom: 10px solid teal; */
}
.row-3{
margin: 20px auto;
width: 200px;
height: 50px;
background: teal;
/* 箭头靠右边 */
clip-path: polygon(0 0, 88% 0, 88% 35%, 95% 50%, 88% 65%, 88% 100%, 0 100%);
/* 箭头靠下边 */
/* clip-path: polygon(0 0, 100% 0, 100% 85%,35% 85%, 30% 100%,25% 85%,0% 85%); */
/* 箭头靠左边 */
/* clip-path: polygon(5% 0, 100% 0, 100% 100%,5% 100%, 5% 65%,0 50%,5% 35%); */
/* 箭头靠下边 */
/* clip-path: polygon(0 15%, 25% 15%, 30% 0,35% 15%, 100% 15%,100% 100%,0% 100%); */
border: 1px solid teal;
}
.row-3 div{
text-align: center;
line-height: 45px;
width: 198px;
height: 48px;
background: #fff;
/* 箭头靠右边 */
clip-path: polygon(0 0, 88% 0, 88% 35%, 95% 50%, 88% 65%, 88% 100%, 0 100%);
/* 箭头靠下边 */
/* clip-path: polygon(0 0, 100% 0, 100% 85%,35% 85%, 30% 100%,25% 85%,0% 85%); */
/* 箭头靠左边 */
/* clip-path: polygon(5% 0, 100% 0, 100% 100%,5% 100%, 5% 65%,0 50%,5% 35%); */
/* 箭头靠下边 */
/* clip-path: polygon(0 15%, 25% 15%, 30% 0,35% 15%, 100% 15%,100% 100%,0% 100%); */
border: 1px solid #fff;
}
.row-4{
margin: 40px auto;
width: 200px;
height: 50px;
color: #fff;
line-height: 50px;
text-align: center;
position: relative;
background: teal;
border-radius: 5px;
}
.row-4::after{
content: '';
position: absolute;
width: 0;
height: 0;
/* 箭头靠右边 skewY(50deg)和skewY(-50deg)可以调节箭头方向*/
top: 25px;
right: -20px;
border-top: 10px solid transparent;
border-bottom: 10px solid transparent;
border-left: 20px solid teal;
transform: skewY(50deg);
/* 箭头靠下边 skewX(50deg)和skewX(-50deg)可以调节箭头方向 */
/* left: 35px;
bottom: -20px;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-top: 20px solid teal;
transform: skewX(50deg); */
/* 箭头靠左边 skewY(50deg)和skewY(-50deg)可以调节箭头方向*/
/* top: 25px;
left: -20px;
border-top: 10px solid transparent;
border-bottom: 10px solid transparent;
border-right: 20px solid teal;
transform: skewY(-50deg); */
/* 箭头靠下边 skewX(50deg)和skewX(-50deg)可以调节箭头方向*/
/* left: 25px;
top: -20px;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-bottom: 20px solid teal;
transform: skewX(50deg); */
}
.row-5{
margin: 20px auto;
width: 200px;
height: 50px;
line-height: 50px;
text-align: center;
position: relative;
border-radius: 5px;
border: 1px solid teal;
}
.row-5::before{
content: '';
position: absolute;
width: 0;
height: 0;
/* 箭头靠右边 */
top: 13px;
right: -15px;
border-top: 10px solid transparent;
border-bottom: 10px solid transparent;
border-left: 15px solid teal;
/* 箭头靠下边 */
/* left: 20px;
bottom: -15px;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-top: 15px solid teal; */
/* 箭头靠左边 */
/* top: 13px;
left: -15px;
border-top: 10px solid transparent;
border-bottom: 10px solid transparent;
border-right: 15px solid teal; */
/* 箭头靠下边 */
/* left: 20px;
top: -15px;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-bottom: 15px solid teal; */
}
.row-5::after{
content: '';
position: absolute;
width: 0;
height: 0;
/* 箭头靠右边 */
top: 13px;
right: -13px;
border-top: 10px solid transparent;
border-bottom: 10px solid transparent;
border-left: 15px solid #fff;
/* 箭头靠下边 */
/* left: 20px;
bottom: -13px;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-top: 15px solid #fff; */
/* 箭头靠左边 */
/* top: 13px;
left: -13px;
border-top: 10px solid transparent;
border-bottom: 10px solid transparent;
border-right: 15px solid #fff; */
/* 箭头靠下边 */
/* left: 20px;
top: -13px;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-bottom: 15px solid #fff; */
最终效果
标签：solid,100%,transparent,箭头,10px,border,下拉框,css From： https://www.cnblogs.com/sgdkg/p/16966510.html