css3动画

不用click事件实现循环切换动画菜单图标使用纯CSS动画

input 类型checkbox  id = name = label的for属性

<nav class="menu">
  <input href="#" class="menu-open" name="menu-open" id="menu-open" type="checkbox">
  <label class="menu-open-button" for="menu-open">
    <span class="hamburger hamburger-1"></span>
    <span class="hamburger hamburger-2"></span>
    <span class="hamburger hamburger-3"></span>
  </label>
  <a href="#" class="menu-item"> <i class="fa fa-bar-chart"></i> </a>
  <a href="#" class="menu-item"> <i class="fa fa-plus"></i> </a>
  <a href="#" class="menu-item"> <i class="fa fa-heart"></i> </a>
  <a href="#" class="menu-item"> <i class="fa fa-envelope"></i> </a>
  <a href="#" class="menu-item"> <i class="fa fa-cog"></i> </a>
</nav>

css

.menu-item, .menu-open-button {background: #ff4081;border-radius: 100%;width: 80px;height: 80px;margin-left: -40px;position: absolute;top: 20px;color: white;text-align: center;line-height: 80px;
  -webkit-transform: translate3d(0, 0, 0);transform: translate3d(0, 0, 0);-webkit-transition: -webkit-transform ease-out 200ms;transition: transform ease-out 200ms;}
.menu-open {display:block;}

.hamburger {width: 25px;height: 3px;background: white;display: block;position: absolute;top: 50%;left: 50%; margin-left: -12.5px;margin-top: -1.5px;-webkit-transition: -webkit-transform 200ms; transition: transform 200ms;}
.hamburger-1 { -webkit-transform: translate3d(0, -8px, 0);transform: translate3d(0, -8px, 0);}
.hamburger-2 { -webkit-transform: translate3d(0, 0, 0); transform: translate3d(0, 0, 0);}
.hamburger-3 { -webkit-transform: translate3d(0, 8px, 0);transform: translate3d(0, 8px, 0);}

.menu-open:checked + .menu-open-button .hamburger-1 { -webkit-transform: translate3d(0, 0, 0) rotate(45deg); transform: translate3d(0, 0, 0) rotate(45deg);}
.menu-open:checked + .menu-open-button .hamburger-2 { -webkit-transform: translate3d(0, 0, 0) scale(0.1, 1); transform: translate3d(0, 0, 0) scale(0.1, 1);}
.menu-open:checked + .menu-open-button .hamburger-3 {-webkit-transform: translate3d(0, 0, 0) rotate(-45deg);transform: translate3d(0, 0, 0) rotate(-45deg);}

.menu-open:checked 既是点击之后的样式

 

过渡

.menu { position: absolute; left: 50%;margin-left: -190px; padding-top: 20px;  padding-left: 190px;  width: 380px;  height: 250px;  box-sizing: border-box; font-size: 20px;  text-align: left;}
.menu-item:hover {  background: white;  color: #ff4081;}
.menu-item:nth-child(3) {-webkit-transition-duration: 70ms;transition-duration: 70ms;}
.menu-item:nth-child(4) {-webkit-transition-duration: 130ms;transition-duration: 130ms;}
.menu-item:nth-child(5) {-webkit-transition-duration: 190ms;transition-duration: 190ms;}
.menu-item:nth-child(6) {-webkit-transition-duration: 250ms;transition-duration: 250ms;}
.menu-item:nth-child(7) { -webkit-transition-duration: 310ms;transition-duration: 310ms;}
.menu-open-button {z-index: 2;-webkit-transition-timing-function: cubic-bezier(0.175, 0.885, 0.32, 1.275);transition-timing-function: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  -webkit-transition-duration: 400ms;transition-duration: 400ms;
  -webkit-transform: scale(1.1, 1.1) translate3d(0, 0, 0);transform: scale(1.1, 1.1) translate3d(0, 0, 0);
  cursor: pointer;
}

.menu-open-button:hover { -webkit-transform: scale(1.2, 1.2) translate3d(0, 0, 0); transform: scale(1.2, 1.2) translate3d(0, 0, 0);}
.menu-open:checked + .menu-open-button {
  -webkit-transition-timing-function: linear;transition-timing-function: linear;
  -webkit-transition-duration: 200ms;transition-duration: 200ms;
  -webkit-transform: scale(0.8, 0.8) translate3d(0, 0, 0); transform: scale(0.8, 0.8) translate3d(0, 0, 0);
}
.menu-open:checked ~ .menu-item {-webkit-transition-timing-function: cubic-bezier(0.935, 0, 0.34, 1.33); transition-timing-function: cubic-bezier(0.935, 0, 0.34, 1.33);}
.menu-open:checked ~ .menu-item:nth-child(3) {
  -webkit-transition-duration: 160ms;transition-duration: 160ms;
  -webkit-transform: translate3d(114.42548px, 11.48084px, 0);transform: translate3d(114.42548px, 11.48084px, 0);
}
.menu-open:checked ~ .menu-item:nth-child(4) {
  -webkit-transition-duration: 240ms;transition-duration: 240ms;
  -webkit-transform: translate3d(77.18543px, 85.2491px, 0);transform: translate3d(77.18543px, 85.2491px, 0);
}
.menu-open:checked ~ .menu-item:nth-child(5) {
  -webkit-transition-duration: 320ms;transition-duration: 320ms;
  -webkit-transform: translate3d(0.09158px, 114.99996px, 0);transform: translate3d(0.09158px, 114.99996px, 0);
}
.menu-open:checked ~ .menu-item:nth-child(6) {
  -webkit-transition-duration: 400ms;transition-duration: 400ms;
  -webkit-transform: translate3d(-77.04956px, 85.37192px, 0);transform: translate3d(-77.04956px, 85.37192px, 0);
}
.menu-open:checked ~ .menu-item:nth-child(7) {
  -webkit-transition-duration: 480ms;transition-duration: 480ms;
  -webkit-transform: translate3d(-114.40705px, 11.66307px, 0); transform: translate3d(-114.40705px, 11.66307px, 0);
}

大腕font-awesome.css 字体图标 http://fontawesome.io/

为自己增加记忆

transition: property  duration   timing-function(默认ease)  delay（默认0)；

clip: rect(10px  350px  170px  0);上右下左