在div上过渡：在野生动物园中不起作用

Question

div上的转换：在safari中不起作用之后 以下是代码：

HTML：

.bbtn {
  width: 151px;
  height: 48px;
  background: #ef2e41;
  margin: auto;
  margin-top: 32px;
  -webkit-transition: all 0.3s ease-in-out;
  -moz-transition: all 0.3s ease-in-out;
  -o-transition: all 0.3s ease-in-out;
  -ms-transition: all 0.3s ease-in-out;
  transition: all 0.3s ease-in-out;
  position: relative;
  border: 2px solid #5f121a;
}
.bbtn input {
  font-size: 25px;
  text-transform: uppercase;
  text-align: center;
  color: #fff;
  background: none;
  border: 0;
  width: 100%;
  padding: 6px 0;
  position: relative;
  z-index: 10;
}
.bbtn:hover {
  border: 2px solid #373737;
}
.bbtn::after,
.bbtn::before {
  content: "";
  position: absolute;
  -webkit-transition: all 0.9s ease-in-out;
  -moz-transition: all 0.9s ease-in-out;
  -o-transition: all 0.9s ease-in-out;
  -ms-transition: all 0.9s ease-in-out;
  transition: all 0.9s ease-in-out;
  width: 0%;
  height: 100%;
  top: 0;
  left: 0;
  background: #202020;
}
.bbtn:hover::after {
  width: 100%;
  -webkit-transition: all 0.9s ease-in-out;
  -moz-transition: all 0.9s ease-in-out;
  -o-transition: all 0.9s ease-in-out;
  -ms-transition: all 0.9s ease-in-out;
  transition: all 0.9s ease-in-out;
}

<div class="bbtn">
  <input name="" type="submit" value="search">
</div>

在这里，您可以找到我的fiddle。

Answer 1

你的野生动物园版本是什么？它仅支持Safari 6.1及更高版本。

请参阅：http://css-tricks.com/transitions-and-animations-on-css-generated-content/