jquery.scrollme.min.js

// ----------------------------------------------------------------------------------------------------
// ScrollMe
// A jQuery plugin for adding simple scrolling effects to web pages
// http://scrollme.nckprsn.com
// ----------------------------------------------------------------------------------------------------
var scrollme=(function(a){var d={};var c=a(document);var b=a(window);d.body_height=0;d.viewport_height=0;d.viewport_top=0;d.viewport_bottom=0;d.viewport_top_previous=-1;d.elements=[];d.elements_in_view=[];d.property_defaults={opacity:1,translatex:0,translatey:0,translatez:0,rotatex:0,rotatey:0,rotatez:0,scale:1,scalex:1,scaley:1,scalez:1};d.scrollme_selector=".scrollme";d.animateme_selector=".animateme";d.update_interval=10;d.easing_functions={linear:function(e){return e},easeout:function(e){return e*e*e},easein:function(e){e=1-e;return 1-(e*e*e)},easeinout:function(e){if(e<0.5){return(4*e*e*e)}else{e=1-e;return 1-(4*e*e*e)}}};d.init_events=["ready","page:load","page:change"];d.init_if=function(){return true};d.init=function(){if(!d.init_if()){return false}d.init_elements();d.on_resize();b.on("resize orientationchange",function(){d.on_resize()});b.load(function(){setTimeout(function(){d.on_resize()},100)});setInterval(d.update,d.update_interval);return true};d.init_elements=function(){a(d.scrollme_selector).each(function(){var e={};e.element=a(this);var f=[];a(this).find(d.animateme_selector).addBack(d.animateme_selector).each(function(){var h={};h.element=a(this);h.when=h.element.data("when");h.from=h.element.data("from");h.to=h.element.data("to");if(h.element.is("[data-crop]")){h.crop=h.element.data("crop")}else{h.crop=true}if(h.element.is("[data-easing]")){h.easing=d.easing_functions[h.element.data("easing")]}else{h.easing=d.easing_functions.easeout}var g={};if(h.element.is("[data-opacity]")){g.opacity=h.element.data("opacity")}if(h.element.is("[data-translatex]")){g.translatex=h.element.data("translatex")}if(h.element.is("[data-translatey]")){g.translatey=h.element.data("translatey")}if(h.element.is("[data-translatez]")){g.translatez=h.element.data("translatez")}if(h.element.is("[data-rotatex]")){g.rotatex=h.element.data("rotatex")}if(h.element.is("[data-rotatey]")){g.rotatey=h.element.data("rotatey")}if(h.element.is("[data-rotatez]")){g.rotatez=h.element.data("rotatez")}if(h.element.is("[data-scale]")){g.scale=h.element.data("scale")}if(h.element.is("[data-scalex]")){g.scalex=h.element.data("scalex")}if(h.element.is("[data-scaley]")){g.scaley=h.element.data("scaley")}if(h.element.is("[data-scalez]")){g.scalez=h.element.data("scalez")}h.properties=g;f.push(h)});e.effects=f;d.elements.push(e)})};d.update=function(){window.requestAnimationFrame(function(){d.update_viewport_position();if(d.viewport_top_previous!=d.viewport_top){d.update_elements_in_view();d.animate()}d.viewport_top_previous=d.viewport_top})};d.animate=function(){var C=d.elements_in_view.length;for(var A=0;A<C;A++){var h=d.elements_in_view[A];var f=h.effects.length;for(var D=0;D<f;D++){var w=h.effects[D];switch(w.when){case"view":case"span":var r=h.top-d.viewport_height;var n=h.bottom;break;case"exit":var r=h.bottom-d.viewport_height;var n=h.bottom;break;default:var r=h.top-d.viewport_height;var n=h.top;break}if(w.crop){if(r<0){r=0}if(n>(d.body_height-d.viewport_height)){n=d.body_height-d.viewport_height}}var g=(d.viewport_top-r)/(n-r);var x=w.from;var j=w.to;var o=j-x;var k=(g-x)/o;var v=w.easing(k);var l=d.animate_value(g,v,x,j,w,"opacity");var t=d.animate_value(g,v,x,j,w,"translatey");var u=d.animate_value(g,v,x,j,w,"translatex");var s=d.animate_value(g,v,x,j,w,"translatez");var B=d.animate_value(g,v,x,j,w,"rotatex");var z=d.animate_value(g,v,x,j,w,"rotatey");var y=d.animate_value(g,v,x,j,w,"rotatez");var E=d.animate_value(g,v,x,j,w,"scale");var q=d.animate_value(g,v,x,j,w,"scalex");var p=d.animate_value(g,v,x,j,w,"scaley");var m=d.animate_value(g,v,x,j,w,"scalez");if("scale" in w.properties){q=E;p=E;m=E}w.element.css({opacity:l,transform:"translate3d( "+u+"px , "+t+"px , "+s+"px ) rotateX( "+B+"deg ) rotateY( "+z+"deg ) rotateZ( "+y+"deg ) scale3d( "+q+" , "+p+" , "+m+" )"})}}};d.animate_value=function(i,h,j,k,n,m){var g=d.property_defaults[m];if(!(m in n.properties)){return g}var e=n.properties[m];var f=(k>j)?true:false;if(i<j&&f){return g}if(i>k&&f){return e}if(i>j&&!f){return g}if(i<k&&!f){return e}var l=g+(h*(e-g));switch(m){case"opacity":l=l.toFixed(2);break;case"translatex":l=l.toFixed(0);break;case"translatey":l=l.toFixed(0);break;case"translatez":l=l.toFixed(0);break;case"rotatex":l=l.toFixed(1);break;case"rotatey":l=l.toFixed(1);break;case"rotatez":l=l.toFixed(1);break;case"scale":l=l.toFixed(3);break;default:break}return l};d.update_viewport_position=function(){d.viewport_top=b.scrollTop();d.viewport_bottom=d.viewport_top+d.viewport_height};d.update_elements_in_view=function(){d.elements_in_view=[];var f=d.elements.length;for(var e=0;e<f;e++){if((d.elements[e].top<d.viewport_bottom)&&(d.elements[e].bottom>d.viewport_top)){d.elements_in_view.push(d.elements[e])}}};d.on_resize=function(){d.update_viewport();d.update_element_heights();d.update_viewport_position();d.update_elements_in_view();d.animate()};d.update_viewport=function(){d.body_height=c.height();d.viewport_height=b.height()};d.update_element_heights=function(){var g=d.elements.length;for(var f=0;f<g;f++){var h=d.elements[f].element.outerHeight();var e=d.elements[f].element.offset();d.elements[f].height=h;d.elements[f].top=e.top;d.elements[f].bottom=e.top+h}};c.on(d.init_events.join(" "),function(){d.init()});return d})(jQuery);