单击后使用JavaScript旋转图像

img {
  display: block;
  margin: 20px;
  width: 50px;
  height: 50px;
}

.crossRotate {
  -webkit-transition-duration: 1s;
  -moz-transition-duration: 1s;
  -o-transition-duration: 1s;
  transition-duration: 1s;
  -webkit-transition-property: -webkit-transform;
  -moz-transition-property: -moz-transform;
  -o-transition-property: -o-transform;
  transition-property: transform;
  outline: 0;
}

.crossRotate.active {
  -webkit-transform: rotate(180deg);
  -moz-transform: rotate(180deg);
  -ms-transform: rotate(180deg);
  -o-transform: rotate(180deg);
  transform: rotate(180deg);
}img {
  display: block;
  margin: 2