css 效果集合

1.css hover滑入滑出效果

  

  div {
      position: absolute;
      width: 200px;
      height: 60px;
    }

    div::before {
      content: "";
      position: absolute;
      left: 0;
      bottom: 0;
      width: 200px;
      height: 3px;
      background: deeppink;
      transition: transform .5s;
      transform: scaleX(0);
      transform-origin: 100% 0;
    }

    div:hover::before {
      transform: scaleX(1);
      transform-origin: 0 0;
    }

<div>
   <h2>hover Me</h2>
</div>