js图片碎片效果（移动端也适用）

<!DOCTYPE html>

<html>

<head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">

    <title>利用JS实现文字的聚合动画效果</title>

    <style>

        .boxWrap1{width: 160px;height: 417px;position: relative;margin:0px auto;}

        .boxWrap1 img{width: 100%;}

        .boxWrap1 div{background: url(http://itakeo.com/wpimg/2_1.png) no-repeat;background-size: 160px auto; position: absolute; left: 0px;top: 0px;

        }

        .boxWrap1.set div{ opacity: 1!important;

            transform:perspective(800px) translate3d(0px,0px,0px) rotate(0deg) scale(1)!important;

            -moz-transform:perspective(800px) translate3d(0px,0px,0px) rotate(0deg) scale(1)!important;

            -webkit-transform:perspective(800px) translate3d(0px,0px,0px) rotate(0deg) scale(1)!important;

        }

        .boxSiteWrap{ width: 100%;overflow: hidden;height: auto; background: #000;padding: 140px 0}

        .boxSiteWrap button{cursor:pointer;display: block;font-size: 16px; width: 140px;height: 40px; background: #fff;color: #000;border:none;margin:30px auto;}

    </style>

</head>

<body>

<div class="boxSiteWrap">

    <div class="boxWrap1"></div>

    <button>重新加载</button>

</div>

<script>

    window.addEventListener('load',function(){

        ;(function(){

            function init(){

                var box = document.querySelector('.boxWrap1')

                 var c=4,r=8;

                var w = box.offsetWidth/c,h = box.offsetHeight/r;

                for(var i=0;i<r;i++){

                    for(var j=0;j<c;j++) {

                        var _div=document.createElement('div');

                        var _left = j * w,_top = i * h;

                        _div.style.cssText = 'width:'+w+'px;height:'+h+'px;left:'+_left+'px;top:'+_top+'px; opacity:0;background-position:'+(-_left) + 'px ' + (-_top) + 'px';

                        _div.style.transition = _div.style.MozTransition = _div.style.WebkitTransition = 'all '+ Random(1,1.8) +'s ease';

                        _div.style.transform = _div.style.MozTransform = _div.style.WebkitTransform = 'perspective(800px) translate3d('+Random(-200,200)+'px, '+Random(-200,200)+'px,300px) rotate('+Random(-90,90)+'deg) scale('+ Random(0,2) +')'

                        box.appendChild(_div);

                    };

                };

                setTimeout(function(){

                    box.classList.add('set')

                },100);

                function Random(start,end){

                    return Math.random()*(end-start)+start;

                };

            };

            init();

            var flag = true;

            document.querySelector('button').onclick = function(){

                if(flag){

                    document.querySelector('.boxWrap1').classList.remove('set')

                    setTimeout(function(){

                        document.querySelector('.boxWrap1').innerHTML = '';

                        init();

                        flag = true;

                    },1200);

                    flag = false;

                };

            };

        })();

    });

</script>

</body>

</html>
demo:https://controllerone.github.io/demo/piece.html
原文链接：http://itakeo.com/blog/2015/12/14/imgcover/?none=123
巴特西

js图片碎片效果（移动端也适用）

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