Question

我想使用CSS3为元素的边框设置动画，无论它是处于悬停状态还是正常状态。有人可以为我提供代码片段或可以指导吗？

我可以使用jQuery做这个，但是寻找一些纯CSS3解决方案。

Answer 1

您可以使用CSS3 transition。看看这个例子：

这是主要代码：

#box {
  position : relative;
  width : 100px;
  height : 100px;
  background-color : gray;
  border : 5px solid black;
  -webkit-transition : border 500ms ease-out;
  -moz-transition : border 500ms ease-out;
  -o-transition : border 500ms ease-out;
  transition : border 500ms ease-out;
}

#box:hover {
   border : 10px solid red;   
}

Answer 2

您也可以试试这个......

button {
  background: none;
  border: 0;
  box-sizing: border-box;
  margin: 1em;
  padding: 1em 2em;
  box-shadow: inset 0 0 0 2px #f45e61;
  color: #f45e61;
  font-size: inherit;
  font-weight: 700;
  position: relative;
  vertical-align: middle;
}
button::before, button::after {
  box-sizing: inherit;
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
}

.draw {
  -webkit-transition: color 0.25s;
  transition: color 0.25s;
}
.draw::before, .draw::after {
  border: 2px solid transparent;
  width: 0;
  height: 0;
}
.draw::before {
  top: 0;
  left: 0;
}
.draw::after {
  bottom: 0;
  right: 0;
}
.draw:hover {
  color: #60daaa;
}
.draw:hover::before, .draw:hover::after {
  width: 100%;
  height: 100%;
}
.draw:hover::before {
  border-top-color: #60daaa;
  border-right-color: #60daaa;
  -webkit-transition: width 0.25s ease-out, height 0.25s ease-out 0.25s;
  transition: width 0.25s ease-out, height 0.25s ease-out 0.25s;
}
.draw:hover::after {
  border-bottom-color: #60daaa;
  border-left-color: #60daaa;
  -webkit-transition: border-color 0s ease-out 0.5s, width 0.25s ease-out 0.5s, height 0.25s ease-out 0.75s;
  transition: border-color 0s ease-out 0.5s, width 0.25s ease-out 0.5s, height 0.25s ease-out 0.75s;
}

<section class="buttons">
  <button class="draw">Draw</button>
  </section

Answer 3

如果您需要无限运行转换，请尝试以下示例：

#box {
  position: relative;
  width: 100px;
  height: 100px;
  background-color: gray;
  border: 5px solid black;
  display: block;
}

#box:hover {
  border-color: red;
  animation-name: flash_border;
  animation-duration: 2s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  -webkit-animation-name: flash_border;
  -webkit-animation-duration: 2s;
  -webkit-animation-timing-function: linear;
  -webkit-animation-iteration-count: infinite;
  -moz-animation-name: flash_border;
  -moz-animation-duration: 2s;
  -moz-animation-timing-function: linear;
  -moz-animation-iteration-count: infinite;
}

@keyframes flash_border {
  0% {
    border-color: red;
  }
  50% {
    border-color: black;
  }
  100% {
    border-color: red;
  }
}

@-webkit-keyframes flash_border {
  0% {
    border-color: red;
  }
  50% {
    border-color: black;
  }
  100% {
    border-color: red;
  }
}

@-moz-keyframes flash_border {
  0% {
    border-color: red;
  }
  50% {
    border-color: black;
  }
  100% {
    border-color: red;
  }
}

<div id="box">roll over me</div>

CSS3动画边框颜色

3 个答案: