详解CSS中左上朝向三角形(Top-Left Triangle)的几种制作方式

#triangle-topleft {
  border: 30px solid #e6686e;
  height: 0;
  width: 0;
  border-right-color: transparent;
  border-bottom-color: transparent;
}

#triangle-topleft {
  width: 0;
  height: 0;
  border-top: 60px solid #e6686e;
  border-right: 60px solid transparent;
}

#triangle-topleft {
  border: 60px solid transparent;
  width: 0;
  height: 0;
  border-left-color: #e6686e;
  border-top-width: 0;
}