在页面加载时启动 CSS 动画 [重复]

Question

是否可以在页面加载时启动 css 动画。目前它只适用于悬停、焦点和活动状态。动画会导致项目摆动，但我希望它自动且持续地发生。

css如下：

@-webkit-keyframes hvr-bob {
  0% {
    -webkit-transform: translateY(-8px);
    transform: translateY(-8px);
  }

  50% {
    -webkit-transform: translateY(-4px);
    transform: translateY(-4px);
  }

  100% {
    -webkit-transform: translateY(-8px);
    transform: translateY(-8px);
  }
}

@keyframes hvr-bob {
  0% {
    -webkit-transform: translateY(-8px);
    transform: translateY(-8px);
  }

  50% {
    -webkit-transform: translateY(-4px);
    transform: translateY(-4px);
  }

  100% {
    -webkit-transform: translateY(-8px);
    transform: translateY(-8px);
  }
}

@-webkit-keyframes hvr-bob-float {
  100% {
    -webkit-transform: translateY(-8px);
    transform: translateY(-8px);
  }
}

@keyframes hvr-bob-float {
  100% {
    -webkit-transform: translateY(-8px);
    transform: translateY(-8px);
  }
}

.hvr-bob {
  display: inline-block;
  vertical-align: middle;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  box-shadow: 0 0 1px rgba(0, 0, 0, 0);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -moz-osx-font-smoothing: grayscale;
}
.hvr-bob:before, .hvr-bob:focus, .hvr-bob:active {
  -webkit-animation-name: hvr-bob-float, hvr-bob;
  animation-name: hvr-bob-float, hvr-bob;
  -webkit-animation-duration: .3s, 1.5s;
  animation-duration: .3s, 1.5s;
  -webkit-animation-delay: 0s, .3s;
  animation-delay: 0s, .3s;
  -webkit-animation-timing-function: ease-out, ease-in-out;
  animation-timing-function: ease-out, ease-in-out;
  -webkit-animation-iteration-count: 1, infinite;
  animation-iteration-count: 1, infinite;
  -webkit-animation-fill-mode: forwards;
  animation-fill-mode: forwards;
  -webkit-animation-direction: normal, alternate;
  animation-direction: normal, alternate;
}

Answer 1

改变这一行

.hvr-bob:before, .hvr-bob:focus, .hvr-bob:active {

到这里

.hvr-bob {

JSBIN