预加载加进度条完整特效代码

效果图

Html

<div class="preloader"><div class="preloader__wrap"><div class="circle-pulse"><div class="circle-pulse__1"></div>

<div class="circle-pulse__2"></div>

</div>

<div class="preloader__progress"><span></span></div>

</div>

</div>

Style/Css

.preloader{position:fixed;top:0;left:0;z-index:1106;display:-webkit-flex;display:-ms-flexbox;display:-moz-box;display:flex;overflow:hidden;width:100%;height:100%;background-color:#fff;text-align:center;opacity:1;-webkit-align-items:center;-ms-flex-align:center;align-items:center;justify-content:center;}
.preloader__wrap{width:100%;max-width:150px;}
.circle-pulse>*{position:absolute;top:50%;left:50%;box-sizing:border-box;border-radius:50%;transform:scale(0,0);animation:pulse 1.6s linear infinite;}
.circle-pulse__1{margin-top:-3rem;margin-left:-3rem;width:6rem;height:6rem;background-color:#2196f3;}
.circle-pulse__2{margin-top:-2.4rem;margin-left:-2.4rem;width:4.8rem;height:4.8rem;background-color:#2196f370;animation-delay:-.3s;-webkit-animation:pulse 1s;}
.preloader__progress{position:absolute;top:0;left:0;overflow:hidden;width:100%;height:2px;background:#fff;}
.preloader__progress span{position:absolute;top:0;left:0;width:0;height:100%;background:#0045ff;transition:opacity .5s linear;}
.preloader__progress .done{opacity:0;}
@-webkit-keyframes pulse{
30%{opacity:1;}
60%{opacity:1;}
100%{opacity:1;transform:scale(1,1);}
}

JavaScript

$(document).ready(function() {
$(function () {
 setInterval(function(){ 
     $(".preloader").fadeOut(); 
 },1000); //设定1秒之后隐藏
});
$({property: 0}).animate({property: 100},{
 duration: 1000, step: function(){
 var percentage = Math.round(this.property);
 $('.preloader__progress span').css('width', percentage+"%");
 if(percentage == 100){
 $(".preloader__progress span").addClass("done");
 }
 }
});
});