闪耀你的div

 1.flash-wrap {
 2  position: relative;
 3  overflow: hidden;
 4}
 5
 6.flash-wrap::after {
 7  content: "";
 8  position: absolute;
 9  left: -100%;
10  top: 0;
11  width: 100%;
12  height: 100%;
13  transform: skewx(-25deg);
14  background-image:
15    -webkit-linear-gradient(0deg, rgba(255, 255, 255, 0),
16    rgba(255, 255, 255, .5),
17    rgba(255, 255, 255, 0));
18  z-index: 10;
19}
20
21.flash-wrap:hover::after {
22  animation: flash 2s ease infinite;
23  animation-delay: .5s;
24}
25
26@keyframes flash {
27  0% {
28    left: -100%;
29  }
30
31  100% {
32    left: 100%;
33  }
34}