javascript SmoothScroll - Отличныйскролдлявсегосайта

Posted 2021-05-03

// Original Code 
// https://codepen.io/ezra_siton/pen/JVVjLW

!function(){var s,i,c,a,o={frameRate:150,animationTime:400,stepSize:100,pulseAlgorithm:!0,pulseScale:4,pulseNormalize:1,accelerationDelta:50,accelerationMax:3,keyboardSupport:!0,arrowScroll:50,fixedBackground:!0,excluded:""},p=o,u=!1,d=!1,l={x:0,y:0},f=!1,m=document.documentElement,h=[],w=/^Mac/.test(navigator.platform),v={left:37,up:38,right:39,down:40,spacebar:32,pageup:33,pagedown:34,end:35,home:36},y={37:1,38:1,39:1,40:1};function b(){if(!f&&document.body){f=!0;var e=document.body,t=document.documentElement,o=window.innerHeight,n=e.scrollHeight;if(m=0<=document.compatMode.indexOf("CSS")?t:e,s=e,p.keyboardSupport&&Y("keydown",D),top!=self)d=!0;else if(Q&&o<n&&(e.offsetHeight<=o||t.offsetHeight<=o)){var r,a=document.createElement("div");a.style.cssText="position:absolute; z-index:-10000; top:0; left:0; right:0; 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B[t]}(d)&&(d.$scrollBehavior=d.style.scrollBehavior,d.style.scrollBehavior="auto");var w=function(e){for(var t=Date.now(),o=0,n=0,r=0;r<g.length;r++){var a=g[r],l=t-a.start,i=l>=p.animationTime,c=i?1:l/p.animationTime;p.pulseAlgorithm&&(c=F(c));var s=a.x*c-a.lastX>>0,u=a.y*c-a.lastY>>0;o+=s,n+=u,a.lastX+=s,a.lastY+=u,i&&(g.splice(r,1),r--)}h?window.scrollBy(o,n):(o&&(d.scrollLeft+=o),n&&(d.scrollTop+=n)),f||m||(g=[]),g.length?j(w,d,1e3/p.frameRate+1):(S=!1,null!=d.$scrollBehavior&&(d.style.scrollBehavior=d.$scrollBehavior,d.$scrollBehavior=null))};j(w,d,0),S=!0}}function e(e){f||b();var t=e.target;if(e.defaultPrevented||e.ctrlKey)return!0;if(N(s,"embed")||N(t,"embed")&&/\.pdf/i.test(t.src)||N(s,"object")||t.shadowRoot)return!0;var o=-e.wheelDeltaX||e.deltaX||0,n=-e.wheelDeltaY||e.deltaY||0;w&&(e.wheelDeltaX&&K(e.wheelDeltaX,120)&&(o=e.wheelDeltaX/Math.abs(e.wheelDeltaX)*-120),e.wheelDeltaY&&K(e.wheelDeltaY,120)&&(n=e.wheelDeltaY/Math.abs(e.wheelDeltaY)*-120)),o||n||(n=-e.wheelDelta||0),1===e.deltaMode&&(o*=40,n*=40);var r=z(t);return r?!!function(e){if(!e)return;h.length||(h=[e,e,e]);e=Math.abs(e),h.push(e),h.shift(),clearTimeout(a),a=setTimeout(function(){try{localStorage.SS_deltaBuffer=h.join(",")}catch(e){}},1e3);var t=120<e&&P(e);return!P(120)&&!P(100)&&!t}(n)||(1.2<Math.abs(o)&&(o*=p.stepSize/120),1.2<Math.abs(n)&&(n*=p.stepSize/120),k(r,o,n),e.preventDefault(),void C()):!d||!W||(Object.defineProperty(e,"target",{value:window.frameElement}),parent.wheel(e))}function D(e){var t=e.target,o=e.ctrlKey||e.altKey||e.metaKey||e.shiftKey&&e.keyCode!==v.spacebar;document.body.contains(s)||(s=document.activeElement);var n=/^(button|submit|radio|checkbox|file|color|image)$/i;if(e.defaultPrevented||/^(textarea|select|embed|object)$/i.test(t.nodeName)||N(t,"input")&&!n.test(t.type)||N(s,"video")||function(e){var t=e.target,o=!1;if(-1!=document.URL.indexOf("www.youtube.com/watch"))do{if(o=t.classList&&t.classList.contains("html5-video-controls"))break}while(t=t.parentNode);return o}(e)||t.isContentEditable||o)return!0;if((N(t,"button")||N(t,"input")&&n.test(t.type))&&e.keyCode===v.spacebar)return!0;if(N(t,"input")&&"radio"==t.type&&y[e.keyCode])return!0;var r=0,a=0,l=z(s);if(!l)return!d||!W||parent.keydown(e);var i=l.clientHeight;switch(l==document.body&&(i=window.innerHeight),e.keyCode){case v.up:a=-p.arrowScroll;break;case v.down:a=p.arrowScroll;break;case v.spacebar:a=-(e.shiftKey?1:-1)*i*.9;break;case v.pageup:a=.9*-i;break;case v.pagedown:a=.9*i;break;case v.home:l==document.body&&document.scrollingElement&&(l=document.scrollingElement),a=-l.scrollTop;break;case v.end:var 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A(e,t,o){window.removeEventListener(e,t,o||!1)}function N(e,t){return e&&(e.nodeName||"").toLowerCase()===t.toLowerCase()}if(window.localStorage&&localStorage.SS_deltaBuffer)try{h=localStorage.SS_deltaBuffer.split(",")}catch(e){}function K(e,t){return Math.floor(e/t)==e/t}function P(e){return K(h[0],e)&&K(h[1],e)&&K(h[2],e)}var $,j=window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||function(e,t,o){window.setTimeout(e,o||1e3/60)},R=window.MutationObserver||window.WebKitMutationObserver||window.MozMutationObserver,q=($=document.scrollingElement,function(){if(!$){var e=document.createElement("div");e.style.cssText="height:10000px;width:1px;",document.body.appendChild(e);var t=document.body.scrollTop;document.documentElement.scrollTop,window.scrollBy(0,3),$=document.body.scrollTop!=t?document.body:document.documentElement,window.scrollBy(0,-3),document.body.removeChild(e)}return $});function V(e){var t;return((e*=p.pulseScale)<1?e-(1-Math.exp(-e)):(e-=1,(t=Math.exp(-1))+(1-Math.exp(-e))*(1-t)))*p.pulseNormalize}function F(e){return 1<=e?1:e<=0?0:(1==p.pulseNormalize&&(p.pulseNormalize/=V(1)),V(e))}var I=window.navigator.userAgent,_=/Edge/.test(I),W=/chrome/i.test(I)&&!_,U=/safari/i.test(I)&&!_,G=/mobile/i.test(I),J=/Windows NT 6.1/i.test(I)&&/rv:11/i.test(I),Q=U&&(/Version\/8/i.test(I)||/Version\/9/i.test(I)),Z=(W||U||J)&&!G,ee=!1;try{window.addEventListener("test",null,Object.defineProperty({},"passive",{get:function(){ee=!0}}))}catch(e){}var te=!!ee&&{passive:!1},oe="onwheel"in document.createElement("div")?"wheel":"mousewheel";function ne(e){for(var t in e)o.hasOwnProperty(t)&&(p[t]=e[t])}oe&&Z&&(Y(oe,e,te),Y("mousedown",t),Y("load",b)),ne.destroy=function(){i&&i.disconnect(),A(oe,e),A("mousedown",t),A("keydown",D),A("resize",c),A("load",b)},window.SmoothScrollOptions&&ne(window.SmoothScrollOptions),"function"==typeof define&&define.amd?define(function(){return 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SmoothScroll({
  // Scrolling Core
  animationTime: 400, // [ms]
  stepSize: 100, // [px]

  // Acceleration
  accelerationDelta: 50, // 50
  accelerationMax: 3, // 3

  // Keyboard Settings
  keyboardSupport: true, // option
  arrowScroll: 50, // [px]

  // Pulse (less tweakable)
  // ratio of "tail" to "acceleration"
  pulseAlgorithm: true,
  pulseScale: 4,
  pulseNormalize: 1,

  // Other
  touchpadSupport: false, // ignore touchpad by default
  fixedBackground: true,
  excluded          : ''  
});