在div上添加小三角

&::before{ width: 0; height: 0; position: absolute; content: ""; right: 10px; top: 9px; border-right: 7px dashed transparent; border-bottom: 7px solid currentColor; border-left: 7px dashed transparent;}

之后再调样式等

转载于:https://www.cnblogs.com/king94Boy/p/11114663.html

相关资源：css小三角的做法与使用