以下是 复选框和单选按钮动画效果代码 的示例演示效果:
部分效果截图1:
部分效果截图2:
部分效果截图3:
部分效果截图4:
部分效果截图5:
HTML代码(index.html):
<!DOCTYPE html>
<html lang="en" class="no-js">
<head>
<meta charset="gb2312" />
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>复选框和单选按钮动画效果</title>
<link rel="stylesheet" type="text/css" href="css/normalize.css" />
<link rel="stylesheet" type="text/css" href="css/demo.css" />
<link rel="stylesheet" type="text/css" href="css/component.css" />
<script src="js/modernizr.custom.js"></script>
</head>
<body>
<div class="container">
<section>
<form class="ac-custom ac-checkbox ac-cross" autocomplete="off">
<h2>How do you collaboratively administrate empowered markets via plug-and-play networks?</h2>
<ul>
<li><input id="cb1" name="cb1" type="checkbox"><label for="cb1">Efficiently unleash information</label></li>
<li><input id="cb2" name="cb2" type="checkbox"><label for="cb2">Quickly maximize timely deliverables</label></li>
<li><input id="cb3" name="cb3" type="checkbox"><label for="cb3">Dramatically maintain solutions</label></li>
<li><input id="cb4" name="cb4" type="checkbox"><label for="cb4">Completely synergize relationships</label></li>
<li><input id="cb5" name="cb5" type="checkbox"><label for="cb5">Professionally cultivate customer service</label></li>
</ul>
</form>
</section>
<section>
<form class="ac-custom ac-radio ac-fill" autocomplete="off">
<h2>Where do you proactively envision multimedia based expertise and cross-media growth strategies?</h2>
<ul>
<li><input id="r1" name="r1" type="radio"><label for="r1">Seamlessly visualize quality intellectual capital</label></li>
<li><input id="r2" name="r1" type="radio"><label for="r2">Collaboratively administrate turnkey channels</label></li>
<li><input id="r3" name="r1" type="radio"><label for="r3">Objectively seize scalable metrics</label></li>
<li><input id="r4" name="r1" type="radio"><label for="r4">Energistically scale future-proof core competencies</label></li>
</ul>
</form>
</section>
<section>
<form class="ac-custom ac-checkbox ac-checkmark" autocomplete="off">
<h2>Why do you interactively procrastinate high-payoff content without backward-compatible data?</h2>
<ul>
<li><input id="cb6" name="cb6" type="checkbox"><label for="cb6">Credibly reintermediate backend ideas</label></li>
<li><input id="cb7" name="cb7" type="checkbox"><label for="cb7">Continually reintermediate integrated processes</label></li>
<li><input id="cb8" name="cb8" type="checkbox"><label for="cb8">Distinctively exploit optimal alignments</label></li>
<li><input id="cb9" name="cb9" type="checkbox"><label for="cb9">Quickly coordinate e-business applications</label></li>
<ul>
</form>
</section>
<section>
<form class="ac-custom ac-radio ac-circle" autocomplete="off">
<h2>How would you dynamically target high-payoff intellectual capital for customized technologies?</h2>
<ul>
<li><input id="r5" name="r2" type="radio"><label for="r5">Objectively integrate emerging core competencies</label></li>
<li><input id="r6" name="r2" type="radio"><label for="r6">Progressively maintain extensive infomediaries</label></li>
<li><input id="r7" name="r2" type="radio"><label for="r7">Proactively fabricate one-to-one materials</label></li>
<li><input id="r8" name="r2" type="radio"><label for="r8">Quickly aggregate B2B users</label></li>
</ul>
</form>
</section>
<section>
<form class="ac-custom ac-checkbox ac-boxfill" autocomplete="off">
<h2>How can you appropriately empower dynamic leadership skills after business portals?</h2>
<ul>
<li><input id="cb10" name="cb10" type="checkbox"><label for="cb10">Professionally fashion wireless leadership</label></li>
<li><input id="cb11" name="cb11" type="checkbox"><label for="cb11">Dynamically reinvent market-driven opportunities</label></li>
<li><input id="cb12" name="cb12" type="checkbox"><label for="cb12">Compellingly embrace empowered e-business</label></li>
<li><input id="cb13" name="cb13" type="checkbox"><label for="cb13">Synergistically deliver performance based methods</label></li>
</ul>
</form>
</section>
<section>
<form class="ac-custom ac-radio ac-swirl" autocomplete="off">
<h2>How do you interactively productize premium technologies whereas interdependent quality vectors?</h2>
<ul>
<li><input id="r9" name="r3" type="radio"><label for="r9">Uniquely matrix economically sound value</label></li>
<li><input id="r10" name="r3" type="radio"><label for="r10">Competently parallel task fully researched data</label></li>
<li><input id="r11" name="r3" type="radio"><label for="r11">Collaboratively expedite quality manufactured products</label></li>
<li><input id="r12" name="r3" type="radio"><label for="r12">Quickly communicate enabled technology and leadership skills</label></li>
</ul>
</form>
</section>
<section>
<form class="ac-custom ac-checkbox ac-diagonal" autocomplete="off">
<h2>Do you rapaciously seize adaptive infomediaries and user-centric intellectual capital and how?</h2>
<ul>
<li><input id="cb14" name="cb14" type="checkbox"><label for="cb14">Collaboratively unleash market-driven "outside the box" thinking</label></li>
<li><input id="cb15" name="cb15" type="checkbox"><label for="cb15">Enthusiastically engage process improvements</label></li>
<li><input id="cb16" name="cb16" type="checkbox"><label for="cb16">Efficiently myocardinate market-driven innovation</label></li>
<li><input id="cb17" name="cb17" type="checkbox"><label for="cb17">Phosfluorescently expedite impactful supply chains</label></li>
</ul>
</form>
</section>
<section>
<form class="ac-custom ac-list" autocomplete="off">
<h2>Your to do list to uniquely deploy cross-unit benefits with wireless testing procedures:</h2>
<ol>
<li><input id="cb18" name="cb18" type="checkbox"><label for="cb18"><span>Quickly incentivize impactful actions</span></label></li>
<li><input id="cb19" name="cb19" type="checkbox"><label for="cb19"><span>Monotonically engage market-driven capital</span></label></li>
<li><input id="cb20" name="cb20" type="checkbox"><label for="cb20"><span>Globally harness multimedia collaboration</span></label></li>
<li><input id="cb21" name="cb21" type="checkbox"><label for="cb21"><span>Professionally cultivate customer service</span></label></li>
<ol>
</form>
</section>
</div><!-- /container -->
<script src="js/svgcheckbx.js"></script>
</body>
</html>
JS代码(modernizr.custom.js):
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JS代码(svgcheckbx.js):
if( document.createElement('svg').getAttributeNS ){
var checkbxsCross = Array.prototype.slice.call( document.querySelectorAll( 'form.ac-cross input[type="checkbox"]' ) ),radiobxsFill = Array.prototype.slice.call( document.querySelectorAll( 'form.ac-fill input[type="radio"]' ) ),checkbxsCheckmark = Array.prototype.slice.call( document.querySelectorAll( 'form.ac-checkmark input[type="checkbox"]' ) ),radiobxsCircle = Array.prototype.slice.call( document.querySelectorAll( 'form.ac-circle input[type="radio"]' ) ),checkbxsBoxfill = Array.prototype.slice.call( document.querySelectorAll( 'form.ac-boxfill input[type="checkbox"]' ) ),radiobxsSwirl = Array.prototype.slice.call( document.querySelectorAll( 'form.ac-swirl input[type="radio"]' ) ),checkbxsDiagonal = Array.prototype.slice.call( document.querySelectorAll( 'form.ac-diagonal input[type="checkbox"]' ) ),checkbxsList = Array.prototype.slice.call( document.querySelectorAll( 'form.ac-list input[type="checkbox"]' ) ),pathDefs ={
cross:['M 10 10 L 90 90','M 90 10 L 10 90'],fill:['M15.833,24.334c2.179-0.443,4.766-3.995,6.545-5.359 c1.76-1.35,4.144-3.732,6.256-4.339c-3.983,3.844-6.504,9.556-10.047,13.827c-2.325,2.802-5.387,6.153-6.068,9.866 c2.081-0.474,4.484-2.502,6.425-3.488c5.708-2.897,11.316-6.804,16.608-10.418c4.812-3.287,11.13-7.53,13.935-12.905 c-0.759,3.059-3.364,6.421-4.943,9.203c-2.728,4.806-6.064,8.417-9.781,12.446c-6.895,7.477-15.107,14.109-20.779,22.608 c3.515-0.784,7.103-2.996,10.263-4.628c6.455-3.335,12.235-8.381,17.684-13.15c5.495-4.81,10.848-9.68,15.866-14.988 c1.905-2.016,4.178-4.42,5.556-6.838c0.051,1.256-0.604,2.542-1.03,3.672c-1.424,3.767-3.011,7.432-4.723,11.076 c-2.772,5.904-6.312,11.342-9.921,16.763c-3.167,4.757-7.082,8.94-10.854,13.205c-2.456,2.777-4.876,5.977-7.627,8.448 c9.341-7.52,18.965-14.629,27.924-22.656c4.995-4.474,9.557-9.075,13.586-14.446c1.443-1.924,2.427-4.939,3.74-6.56 c-0.446,3.322-2.183,6.878-3.312,10.032c-2.261,6.309-5.352,12.53-8.418,18.482c-3.46,6.719-8.134,12.698-11.954,19.203 c-0.725,1.234-1.833,2.451-2.265,3.77c2.347-0.48,4.812-3.199,7.028-4.286c4.144-2.033,7.787-4.938,11.184-8.072 c3.142-2.9,5.344-6.758,7.925-10.141c1.483-1.944,3.306-4.056,4.341-6.283c0.041,1.102-0.507,2.345-0.876,3.388 c-1.456,4.114-3.369,8.184-5.059,12.212c-1.503,3.583-3.421,7.001-5.277,10.411c-0.967,1.775-2.471,3.528-3.287,5.298 c2.49-1.163,5.229-3.906,7.212-5.828c2.094-2.028,5.027-4.716,6.33-7.335c-0.256,1.47-2.07,3.577-3.02,4.809'],checkmark:['M16.667,62.167c3.109,5.55,7.217,10.591,10.926,15.75 c2.614,3.636,5.149,7.519,8.161,10.853c-0.046-0.051,1.959,2.414,2.692,2.343c0.895-0.088,6.958-8.511,6.014-7.3 c5.997-7.695,11.68-15.463,16.931-23.696c6.393-10.025,12.235-20.373,18.104-30.707C82.004,24.988,84.802,20.601,87,16'],circle:['M34.745,7.183C25.078,12.703,13.516,26.359,8.797,37.13 c-13.652,31.134,9.219,54.785,34.77,55.99c15.826,0.742,31.804-2.607,42.207-17.52c6.641-9.52,12.918-27.789,7.396-39.713 C85.873,20.155,69.828-5.347,41.802,13.379'],boxfill:['M6.987,4.774c15.308,2.213,30.731,1.398,46.101,1.398 c9.74,0,19.484,0.084,29.225,0.001c2.152-0.018,4.358-0.626,6.229,1.201c-5.443,1.284-10.857,2.58-16.398,2.524 c-9.586-0.096-18.983,2.331-28.597,2.326c-7.43-0.003-14.988-0.423-22.364,1.041c-4.099,0.811-7.216,3.958-10.759,6.81 c8.981-0.104,17.952,1.972,26.97,1.94c8.365-0.029,16.557-1.168,24.872-1.847c2.436-0.2,24.209-4.854,24.632,2.223 c-14.265,5.396-29.483,0.959-43.871,0.525c-12.163-0.368-24.866,2.739-36.677,6.863c14.93,4.236,30.265,2.061,45.365,2.425 c7.82,0.187,15.486,1.928,23.337,1.903c2.602-0.008,6.644-0.984,9,0.468c-2.584,1.794-8.164,0.984-10.809,1.165 c-13.329,0.899-26.632,2.315-39.939,3.953c-6.761,0.834-13.413,0.95-20.204,0.938c-1.429-0.001-2.938-0.155-4.142,0.436 c5.065,4.68,15.128,2.853,20.742,2.904c11.342,0.104,22.689-0.081,34.035-0.081c9.067,0,20.104-2.412,29.014,0.643 c-4.061,4.239-12.383,3.389-17.056,4.292c-11.054,2.132-21.575,5.041-32.725,5.289c-5.591,0.124-11.278,1.001-16.824,2.088 c-4.515,0.885-9.461,0.823-13.881,2.301c2.302,3.186,7.315,2.59,10.13,2.694c15.753,0.588,31.413-0.231,47.097-2.172 c7.904-0.979,15.06,1.748,22.549,4.877c-12.278,4.992-25.996,4.737-38.58,5.989c-8.467,0.839-16.773,1.041-25.267,0.984 c-4.727-0.031-10.214-0.851-14.782,1.551c12.157,4.923,26.295,2.283,38.739,2.182c7.176-0.06,14.323,1.151,21.326,3.07 c-2.391,2.98-7.512,3.388-10.368,4.143c-8.208,2.165-16.487,3.686-24.71,5.709c-6.854,1.685-13.604,3.616-20.507,4.714 c-1.707,0.273-3.337,0.483-4.923,1.366c2.023,0.749,3.73,0.558,5.95,0.597c9.749,0.165,19.555,0.31,29.304-0.027 c15.334-0.528,30.422-4.721,45.782-4.653'],swirl:['M49.346,46.341c-3.79-2.005,3.698-10.294,7.984-8.89 c8.713,2.852,4.352,20.922-4.901,20.269c-4.684-0.33-12.616-7.405-14.38-11.818c-2.375-5.938,7.208-11.688,11.624-13.837 c9.078-4.42,18.403-3.503,22.784,6.651c4.049,9.378,6.206,28.09-1.462,36.276c-7.091,7.567-24.673,2.277-32.357-1.079 c-11.474-5.01-24.54-19.124-21.738-32.758c3.958-19.263,28.856-28.248,46.044-23.244c20.693,6.025,22.012,36.268,16.246,52.826 c-5.267,15.118-17.03,26.26-33.603,21.938c-11.054-2.883-20.984-10.949-28.809-18.908C9.236,66.096,2.704,57.597,6.01,46.371 c3.059-10.385,12.719-20.155,20.892-26.604C40.809,8.788,58.615,1.851,75.058,12.031c9.289,5.749,16.787,16.361,18.284,27.262 c0.643,4.698,0.646,10.775-3.811,13.746'],diagonal:['M16.053,91.059c0.435,0,0.739-0.256,0.914-0.768 c3.101-2.85,5.914-6.734,8.655-9.865C41.371,62.438,56.817,44.11,70.826,24.721c3.729-5.16,6.914-10.603,10.475-15.835 c0.389-0.572,0.785-1.131,1.377-1.521'],list:['M1.986,8.91c41.704,4.081,83.952,5.822,125.737,2.867 c17.086-1.208,34.157-0.601,51.257-0.778c21.354-0.223,42.706-1.024,64.056-1.33c18.188-0.261,36.436,0.571,54.609,0.571','M3.954,25.923c9.888,0.045,19.725-0.905,29.602-1.432 c16.87-0.897,33.825-0.171,50.658-2.273c14.924-1.866,29.906-1.407,44.874-1.936c19.9-0.705,39.692-0.887,59.586,0.45 c35.896,2.407,71.665-1.062,107.539-1.188']}
,animDefs ={
cross:{
speed:.2,easing:'ease-in-out'}
,fill:{
speed:.8,easing:'ease-in-out'}
,checkmark:{
speed:.2,easing:'ease-in-out'}
,circle:{
speed:.2,easing:'ease-in-out'}
,boxfill:{
speed:.8,easing:'ease-in'}
,swirl:{
speed:.8,easing:'ease-in'}
,diagonal:{
speed:.2,easing:'ease-in-out'}
,list:{
speed:.3,easing:'ease-in-out'}
}
;
function createSVGEl( def ){
var svg = document.createElementNS("http://www.w3.org/2000/svg","svg");
if( def ){
svg.setAttributeNS( null,'viewBox',def.viewBox );
svg.setAttributeNS( null,'preserveAspectRatio',def.preserveAspectRatio );
}
else{
svg.setAttributeNS( null,'viewBox','0 0 100 100' );
}
svg.setAttribute( 'xmlns','http://www.w3.org/2000/svg' );
return svg;
}
function controlCheckbox( el,type,svgDef ){
var svg = createSVGEl( svgDef );
el.parentNode.appendChild( svg );
el.addEventListener( 'change',function(){
if( el.checked ){
draw( el,type );
}
else{
reset( el );
}
}
);
}
function controlRadiobox( el,type ){
var svg = createSVGEl();
el.parentNode.appendChild( svg );
el.addEventListener( 'change',function(){
resetRadio( el );
draw( el,type );
}
);
}
checkbxsCross.forEach( function( el,i ){
controlCheckbox( el,'cross' );
}
);
radiobxsFill.forEach( function( el,i ){
controlRadiobox( el,'fill' );
}
);
checkbxsCheckmark.forEach( function( el,i ){
controlCheckbox( el,'checkmark' );
}
);
radiobxsCircle.forEach( function( el,i ){
controlRadiobox( el,'circle' );
}
);
checkbxsBoxfill.forEach( function( el,i ){
controlCheckbox( el,'boxfill' );
}
);
radiobxsSwirl.forEach( function( el,i ){
controlRadiobox( el,'swirl' );
}
);
checkbxsDiagonal.forEach( function( el,i ){
controlCheckbox( el,'diagonal' );
}
);
checkbxsList.forEach( function( el ){
controlCheckbox( el,'list',{
viewBox:'0 0 300 100',preserveAspectRatio:'none'}
);
}
);
function draw( el,type ){
var paths = [],pathDef,animDef,svg = el.parentNode.querySelector( 'svg' );
switch( type ){
case 'cross':pathDef = pathDefs.cross;
animDef = animDefs.cross;
break;
case 'fill':pathDef = pathDefs.fill;
animDef = animDefs.fill;
break;
case 'checkmark':pathDef = pathDefs.checkmark;
animDef = animDefs.checkmark;
break;
case 'circle':pathDef = pathDefs.circle;
animDef = animDefs.circle;
break;
case 'boxfill':pathDef = pathDefs.boxfill;
animDef = animDefs.boxfill;
break;
case 'swirl':pathDef = pathDefs.swirl;
animDef = animDefs.swirl;
break;
case 'diagonal':pathDef = pathDefs.diagonal;
animDef = animDefs.diagonal;
break;
case 'list':pathDef = pathDefs.list;
animDef = animDefs.list;
break;
}
;
paths.push( document.createElementNS('http://www.w3.org/2000/svg','path' ) );
if( type === 'cross' || type === 'list' ){
paths.push( document.createElementNS('http://www.w3.org/2000/svg','path' ) );
}
for( var i = 0,len = paths.length;
i < len;
++i ){
var path = paths[i];
svg.appendChild( path );
path.setAttributeNS( null,'d',pathDef[i] );
var length = path.getTotalLength();
// Clear any previous transition//path.style.transition = path.style.WebkitTransition = path.style.MozTransition = 'none';
// Set up the starting positionspath.style.strokeDasharray = length + ' ' + length;
if( i === 0 ){
path.style.strokeDashoffset = Math.floor( length ) - 1;
}
else path.style.strokeDashoffset = length;
// Trigger a layout so styles are calculated & the browser// picks up the starting position before animatingpath.getBoundingClientRect();
// Define our transitionpath.style.transition = path.style.WebkitTransition = path.style.MozTransition = 'stroke-dashoffset ' + animDef.speed + 's ' + animDef.easing + ' ' + i * animDef.speed + 's';
// Go!path.style.strokeDashoffset = '0';
}
}
function reset( el ){
Array.prototype.slice.call( el.parentNode.querySelectorAll( 'svg > path' ) ).forEach( function( el ){
el.parentNode.removeChild( el );
}
);
}
function resetRadio( el ){
Array.prototype.slice.call( document.querySelectorAll( 'input[type="radio"][name="' + el.getAttribute( 'name' ) + '"]' ) ).forEach( function( el ){
var path = el.parentNode.querySelector( 'svg > path' );
if( path ){
path.parentNode.removeChild( path );
}
}
);
}
}
CSS代码(component.css):
*,*:after,*::before{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;}
.ac-custom{padding:0 3em;max-width:900px;margin:0 auto;}
.ac-custom h2{font-size:3em;font-weight:300;padding:0 0 0.5em;margin:0 0 30px;}
.ac-custom ul,.ac-custom ol{list-style:none;padding:0;margin:0 auto;max-width:800px;}
.ac-custom li{margin:0 auto;padding:2em 0;position:relative;}
.ac-custom label{display:inline-block;position:relative;font-size:2em;padding:0 0 0 80px;vertical-align:top;color:rgba(0,0,0,0.2);cursor:pointer;-webkit-transition:color 0.3s;transition:color 0.3s;}
.ac-custom input[type="checkbox"],.ac-custom input[type="radio"],.ac-custom label::before{width:50px;height:50px;top:50%;left:0;margin-top:-25px;position:absolute;cursor:pointer;}
.ac-custom input[type="checkbox"],.ac-custom input[type="radio"]{opacity:0;-webkit-appearance:none;display:inline-block;vertical-align:middle;z-index:100;}
.ac-custom label::before{content:'';border:4px solid #fff;-webkit-transition:opacity 0.3s;transition:opacity 0.3s;}
.ac-radio label::before{border-radius:50%;}
.ac-custom input[type="checkbox"]:checked + label,.ac-custom input[type="radio"]:checked + label{color:#fff;}
.ac-custom input[type="checkbox"]:checked + label::before,.ac-custom input[type="radio"]:checked + label::before{opacity:0.8;}
/* General SVG and path styles */
.ac-custom svg{position:absolute;width:40px;height:40px;top:50%;margin-top:-20px;left:5px;pointer-events:none;}
.ac-custom svg path{stroke:#fdfcd3;stroke-width:13px;stroke-linecap:round;stroke-linejoin:round;fill:none;}
/* Specific input,SVG and path styles */
/* Circle */
.ac-circle input[type="checkbox"],.ac-circle input[type="radio"],.ac-circle label::before{width:30px;height:30px;margin-top:-15px;left:10px;position:absolute;}
.ac-circle label::before{background-color:#fff;border:none;}
.ac-circle svg{width:70px;height:70px;margin-top:-35px;left:-10px;}
.ac-circle svg path{stroke-width:5px;}
/* Box Fill */
.ac-boxfill svg path{stroke-width:8px;}
/* Swirl */
.ac-swirl svg path{stroke-width:8px;}
/* List */
.ac-list ol{list-style:decimal;list-style-position:inside;}
.ac-list ol li{font-size:2em;padding:1em 1em 0 2em;text-indent:-40px;}
.ac-list ol li label{font-size:1em;text-indent:0;padding-left:30px;}
.ac-list label::before{display:none;}
.ac-list svg{width:100%;height:80px;left:0;top:1.2em;margin-top:0px;}
.ac-list svg path{stroke-width:4px;}
/* Media Queries */
@media screen and (max-width:50em){section{font-size:80%;}
}
CSS代码(demo.css):
@import url(http://fonts.googleapis.com/css?family=Lato:300,400,700);@font-face{font-family:'codropsicons';src:url('../fonts/codropsicons/codropsicons.eot');src:url('../fonts/codropsicons/codropsicons.eot?#iefix') format('embedded-opentype'),url('../fonts/codropsicons/codropsicons.woff') format('woff'),url('../fonts/codropsicons/codropsicons.ttf') format('truetype'),url('../fonts/codropsicons/codropsicons.svg#codropsicons') format('svg');font-weight:normal;font-style:normal;}
body{background:#fb887c;color:#fff;font-family:'Lato',Arial,sans-serif;}
a{color:#fff;opacity:0.7;text-decoration:none;}
a:hover,a:focus{opacity:1;}
.container > header{margin:0 auto;padding:4em 2em;text-align:center;background:rgba(0,0,0,.05);}
.container > header h1{font-size:2.625em;line-height:1.3;margin:0;font-weight:300;}
.container > header span{display:block;font-size:60%;color:rgba(0,0,0,.2);font-weight:400;padding:0 0 0.6em 0.1em;}
section{padding:7em 0;}
section:nth-child(even){background:rgba(0,0,0,.05);}
section.related{text-align:center;font-size:1.6em;}
.related p{margin:0;padding:1.1em;}
/* To Navigation Style */
.codrops-top{text-transform:uppercase;width:100%;font-size:0.69em;line-height:2.2;font-weight:700;}
.codrops-top a{text-decoration:none;padding:0 1em;letter-spacing:0.1em;display:inline-block;}
.codrops-top span.right{float:right;}
.codrops-top span.right a{float:left;display:block;}
.codrops-icon:before{font-family:'codropsicons';margin:0 4px;speak:none;font-style:normal;font-weight:normal;font-variant:normal;text-transform:none;line-height:1;-webkit-font-smoothing:antialiased;}
.codrops-icon-drop:before{content:"\e001";}
.codrops-icon-prev:before{content:"\e004";}
@media screen and (max-width:25em){.codrops-icon span{display:none;}
}
CSS代码(normalize.css):
article,aside,details,figcaption,figure,footer,header,hgroup,main,nav,section,summary{display:block;}
audio,canvas,video{display:inline-block;}
audio:not([controls]){display:none;height:0;}
[hidden]{display:none;}
html{font-family:sans-serif;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%;}
body{margin:0;}
a:focus{outline:thin dotted;}
a:active,a:hover{outline:0;}
h1{font-size:2em;margin:0.67em 0;}
abbr[title]{border-bottom:1px dotted;}
b,strong{font-weight:bold;}
dfn{font-style:italic;}
hr{-moz-box-sizing:content-box;box-sizing:content-box;height:0;}
mark{background:#ff0;color:#000;}
code,kbd,pre,samp{font-family:monospace,serif;font-size:1em;}
pre{white-space:pre-wrap;}
q{quotes:"\201C" "\201D" "\2018" "\2019";}
small{font-size:80%;}
sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline;}
sup{top:-0.5em;}
sub{bottom:-0.25em;}
img{border:0;}
svg:not(:root){overflow:hidden;}
figure{margin:0;}
fieldset{border:1px solid #c0c0c0;margin:0 2px;padding:0.35em 0.625em 0.75em;}
legend{border:0;padding:0;}
button,input,select,textarea{font-family:inherit;font-size:100%;margin:0;}
button,input{line-height:normal;}
button,select{text-transform:none;}
button,html input[type="button"],input[type="reset"],input[type="submit"]{-webkit-appearance:button;cursor:pointer;}
button[disabled],html input[disabled]{cursor:default;}
input[type="checkbox"],input[type="radio"]{box-sizing:border-box;padding:0;}
input[type="search"]{-webkit-appearance:textfield;-moz-box-sizing:content-box;-webkit-box-sizing:content-box;box-sizing:content-box;}
input[type="search"]::-webkit-search-cancel-button,input[type="search"]::-webkit-search-decoration{-webkit-appearance:none;}
button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0;}
textarea{overflow:auto;vertical-align:top;}
table{border-collapse:collapse;border-spacing:0;}
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