CSS3悬停效果

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html

css

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html

css

body{
  margin: 0px;
  padding: 0px;
  background: #e74c3c;
  font-family: 'Lato', sans-serif;
}

nav{
  float: none; 
  clear: both;
  width: 30%; 
  margin: 10% auto;
  background: #eee;
}

nav ul {
  list-style: none;
  margin: 0px;
  padding: 0px;
}

nav li{
	float: none; 
  width: 100%;
}

nav li a{
  display: block; 
  width: 100%; 
  padding: 20px; 
  border-left: 5px solid; 
  position: relative; 
  z-index: 2;
  text-decoration: none;
  color: #444;
  box-sizing: border-box;  
  -moz-box-sizing: border-box;  
  -webkit-box-sizing: border-box; 
}
	
nav li a:hover{ border-bottom: 0px; color: #fff;}
nav li:first-child a{ border-left: 10px solid #3498db; }
nav li:nth-child(2) a{ border-left: 10px solid #ffd071; }
nav li:nth-child(3) a{ border-left: 10px solid #f0776c; }
nav li:last-child a{ border-left: 10px solid #1abc9c; }

nav li a:after { 
  content: "";
  height: 100%; 
  left: 0; 
  top: 0; 
  width: 0px;  
  position: absolute; 
  transition: all 0.3s ease 0s; 
  -webkit-transition: all 0.3s ease 0s; 
  z-index: -1;
}

nav li a:hover:after{ width: 100%; }
nav li:first-child a:after{ background: #3498db; }
nav li:nth-child(2) a:after{ background: #ffd071; }
nav li:nth-child(3) a:after{ background: #f0776c; }
nav li:last-child a:after{ background: #1abc9c; }

JavaScript

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