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tt.html
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no">
<title>html5+ js +css3 点击后水波纹扩散效果 兼容移动端-幸凡学习网</title>
<style>
body {margin:0;padding:0;}
.center{text-align:center}
.btn {position:relative;width:13em;height:3em;margin:2em;border:none;outline:none;-webkit-appearance: none;-webkit-tap-highlight-color: rgba(0, 0, 0, 0);letter-spacing:.2em;font-weight:bold;background:#999;cursor:pointer;overflow:hidden;user-select:none;border-radius:2px;color:#fff;}
button:nth-child(2) {background:#4285f4;}
button:nth-child(3) {background:#00bad2;}
button:nth-child(4) {background:#ff8a80;}
button:nth-child(5) {background:#ffae00;}
button:nth-child(6) {background:#aec156;}
button:nth-child(7) {background:#a060a8;}
button:nth-child(8) {background:#a78660;}
button:nth-child(9) {background:#5da065;}
button:nth-child(10) {background:#5e6b9a;}
button:nth-child(11) {background:#9a5e5e;}
button:nth-child(12) {background:#666;}
.ripple {position:absolute;background:rgba(0,0,0,.15);border-radius:100%;transform:scale(0);pointer-events:none;}
.ripple.show {animation:ripple .75s ease-out;}
@keyframes ripple {to {transform:scale(2);opacity:0;}}
</style>
</head>
<body>
<div class="main center">
<button class="btn">BUTTON</button>
<button class="btn">BUTTON</button>
<button class="btn">BUTTON</button>
<button class="btn">BUTTON</button>
<button class="btn">BUTTON</button>
<button class="btn">BUTTON</button>
<button class="btn">BUTTON</button>
<button class="btn">BUTTON</button>
<button class="btn">BUTTON</button>
<button class="btn">BUTTON</button>
<button class="btn">BUTTON</button>
<button class="btn">BUTTON</button>
</div>
<script>
var addRippleEffect = function (e) {
var target = e.target;
if (target.className.toLowerCase() !== 'btn') return false;
var rect = target.getBoundingClientRect();
var ripple = null;
var box = null;
box = document.createElement('div');
ripple = document.createElement('span');
ripple.className = 'ripple';
ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + 'px';
target.appendChild(ripple);
ripple.classList.remove('show');
var top = e.offsetY- (ripple.offsetHeight / 2);
var left = e.offsetX - (ripple.offsetWidth / 2);
ripple.style.top = top + 'px';
ripple.style.left = left + 'px';
ripple.classList.add('show');
setTimeout(()=>{
target.removeChild(ripple)
},1000);
return false;
};
document.addEventListener('click', addRippleEffect, false);
</script>
</body>
</html>