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l(e){var t=this;h(this,l),this.params=this._setParams(e),this._flakes=[],this._isBody=this.params.container===document.body;var n=this._container=document.createElement("div");n.classList.add("snowflakes"),this._isBody&&n.classList.add("snowflakes_body"),m(n,{zIndex:this.params.zIndex}),this.params.container.appendChild(n),this.params.stop&&this.stop(),l._mainStyleNode||(l._mainStyleNode=this._injectStyle(".snowflakes_paused .snowflake,.snowflakes_paused .snowflake__inner,.snowflakes_paused .snowflake__inner:before{-webkit-animation-play-state:paused;animation-play-state:paused}.snowflakes_body{position:fixed;left:0;top:0;width:100%}.snowflake{position:absolute;-webkit-animation:snowflake_y 10s infinite linear;animation:snowflake_y 10s infinite linear;will-change:transform;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;pointer-events:none}.snowflake__inner{position:absolute;left:0;right:0;top:0;bottom:0}.snowflake__inner:before{position:absolute;left:0;right:0;top:0;bottom:0;content:'';background-size:100% 100%}.snowflake__inner_wind{-webkit-animation:snowflake_x_8 1s infinite alternate ease-in-out;animation:snowflake_x_8 1s infinite alternate ease-in-out}.snowflake__inner_rotation:before{-webkit-animation:snowflake_rotation 2s infinite linear;animation:snowflake_rotation 2s infinite linear}.snowflake__inner_rotation_reverse:before{-webkit-animation:snowflake_rotation_reverse 2s infinite linear;animation:snowflake_rotation_reverse 2s infinite linear}@-webkit-keyframes snowflake_rotation{from{-webkit-transform:rotate(0deg);transform:rotate(0deg)}to{-webkit-transform:rotate(360deg);transform:rotate(360deg)}}@keyframes snowflake_rotation{from{-webkit-transform:rotate(0deg);transform:rotate(0deg)}to{-webkit-transform:rotate(360deg);transform:rotate(360deg)}}@-webkit-keyframes snowflake_rotation_reverse{from{-webkit-transform:rotate(0deg);transform:rotate(0deg)}to{-webkit-transform:rotate(-360deg);transform:rotate(-360deg)}}@keyframes snowflake_rotation_reverse{from{-webkit-transform:rotate(0deg);transform:rotate(0deg)}to{-webkit-transform:rotate(-360deg);transform:rotate(-360deg)}}"),l._count=(l._count||0)+1),this._winHeight=this._getWindowHeight(),this._onResize=function(){t._winHeight=t._getWindowHeight();var a=t._height();m(n,{display:"none"}),t._flakes.forEach(function(e){return e.resize(a,t.params)}),t._updateAnimationStyle(),m(n,{display:"block"})},this._imagesStyleNode=this._injectStyle(s.replace(/%7Bcolor%7D/g,encodeURIComponent(this.params.color))),this._animationStyleNode=this._injectStyle(this._getAnimationStyle()),window.addEventListener("resize",this._onResize,!1);for(var a=0;a<this.params.count;a++)this._flakes.push(new r(n,this._height(),this.params))}return e(l,[{key:"destroy",value:function(){this._removeStyle(),this._container&&this._container.parentNode.removeChild(this._container),delete this._container,window.removeEventListener("resize",this._onResize,!1),this._flakes.forEach(function(e){return e.destroy()}),delete this._flakes,delete this.params}},{key:"start",value:function(){this._container.classList.remove("snowflakes_paused")}},{key:"stop",value:function(){this._container.classList.add("snowflakes_paused")}},{key:"_setParams",value:function(l){l=l||{};var i={};return[["color","#5ECDEF"],["container",document.body],["count",50],["speed",1],["stop",!1],["rotation",!0],["minOpacity",.6],["maxOpacity",1],["minSize",8],["maxSize",18],["types",6],["width"],["height"],["wind",!0],["zIndex",9999]].forEach(function(e){var a=o(e,2),t=a[0],n=a[1];i[t]="boolean"==typeof n?t in l?l[t]:n:l[t]||n}),i}},{key:"_getAnimationStyle",value:function(){for(var e=this._height()+this.params.maxSize+"px",a="@-webkit-keyframes snowflake_y{from{-webkit-transform:translateY(0px)}to{-webkit-transform:translateY(".concat(e,");}}\n@keyframes snowflake_y{from{transform:translateY(0px)}to{transform:translateY(").concat(e,")}}"),t=0;t<=r.maxInnerSize;t++){var n=4*(r.calcSize(t,this.params)-this.params.minSize)+"px";a+="@-webkit-keyframes snowflake_x_".concat(t,"{from{-webkit-transform:translateX(0px)}to{-webkit-transform:translateX(").concat(n,");}}\n@keyframes snowflake_x_").concat(t,"{from{transform:translateX(0px)}to{transform:translateX(").concat(n,")}}")}return a}},{key:"_updateAnimationStyle",value:function(){this._injectStyle(this._getAnimationStyle(),this._animationStyleNode)}},{key:"_injectStyle",value:function(e,a){return a||(a=document.createElement("style"),document.body.appendChild(a)),a.styleSheet?a.styleSheet.cssText=e:"textContent"in a?a.textContent=e:a.innerHTML=e,a}},{key:"_removeStyle",value:function(){--l._count<=0&&(l._count=0,l._mainStyleNode&&(l._mainStyleNode.parentNode.removeChild(l._mainStyleNode),delete l._mainStyleNode)),this._animationStyleNode&&(this._animationStyleNode.parentNode.removeChild(this._animationStyleNode),delete this._animationStyleNode),this._imagesStyleNode&&(this._imagesStyleNode.parentNode.removeChild(this._imagesStyleNode),delete this._imagesStyleNode)}},{key:"_height",value:function(){return this.params.height||(this._isBody?this._winHeight:this.params.container.offsetHeight+this.params.maxSize)}},{key:"_getWindowHeight",value:function(){var e,a=document.body,t=document.documentElement;return window.innerHeight?e=window.innerHeight:t&&t.clientHeight?e=t.clientHeight:a&&(e=a.clientHeight),e}}]),l}();return function(e){return new d(e)}}); |