"use strict";function t(){return(t=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n=arguments[e];for(var i in n)Object.prototype.hasOwnProperty.call(n,i)&&(t[i]=n[i])}return t}).apply(this,arguments)}Object.defineProperty(exports,"__esModule",{value:!0});var e=function(t,e){return void 0===e&&(e=.996),t*e/(1-e)};function n(t){return t[t.length-1]}function i(t){return t.reduce((function(t,e){return t+e}))/t.length}var r=function(t,e,n){return Math.min(Math.max(e,t),n)};function o(t,e){if(t.length!==e.length)throw new Error("vectors must be same length");return t.map((function(t,n){return t+e[n]}))}function a(t){return Math.max.apply(Math,t.map(Math.abs))}function s(t){return Object.freeze(t),Object.values(t).forEach((function(t){null===t||"object"!=typeof t||Object.isFrozen(t)||s(t)})),t}var u=[1,18,"undefined"!=typeof window&&window.innerHeight||800],c=[-1,-1,-1],l=s({preventWheelAction:!0,reverseSign:[!0,!0,!1]});function f(f){void 0===f&&(f={});var m,d,p,v=function(){var t={};function e(e,n){t[e]=(t[e]||[]).filter((function(t){return t!==n}))}return s({on:function(n,i){return t[n]=(t[n]||[]).concat(i),function(){return e(n,i)}},off:e,dispatch:function(e,n){e in t&&t[e].forEach((function(t){return t(n)}))}})}(),h=v.on,x=v.off,M=v.dispatch,b=l,g={isStarted:!1,isStartPublished:!1,isMomentum:!1,startTime:0,lastAbsDelta:Infinity,axisMovement:[0,0,0],axisVelocity:[0,0,0],accelerationFactors:[],scrollPoints:[],scrollPointsToMerge:[],willEndTimeout:400},S=!1,y=function(t){Array.isArray(t)?t.forEach((function(t){return T(t)})):T(t)},D=function(e){return void 0===e&&(e={}),Object.values(e).some((function(t){return null==t}))?b:b=s(t({},l,b,e))},P=function(n){var i=t({event:m,isStart:!1,isEnding:!1,isMomentumCancel:!1,isMomentum:g.isMomentum,axisDelta:[0,0,0],axisVelocity:g.axisVelocity,axisMovement:g.axisMovement,get axisMovementProjection(){return o(i.axisMovement,i.axisVelocity.map((function(t){return 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Math.abs(o)>=t;default:return!1}}(f,s)&&e.preventDefault(),g.isStarted?g.isMomentum&&f>Math.max(2,2*g.lastAbsDelta)&&(C(!0),z()):z(),0===f&&Object.is&&Object.is(e.deltaX,-0)?S=!0:(m=e,g.axisMovement=o(g.axisMovement,s),g.lastAbsDelta=f,g.scrollPointsToMerge.push({axisDelta:s,timeStamp:l}),w(),P({axisDelta:s,isStart:!g.isStartPublished}),g.isStartPublished=!0,W())},w=function(){2===g.scrollPointsToMerge.length?(g.scrollPoints.unshift({axisDeltaSum:g.scrollPointsToMerge.map((function(t){return t.axisDelta})).reduce(o),timeStamp:i(g.scrollPointsToMerge.map((function(t){return t.timeStamp})))}),j(),g.scrollPointsToMerge.length=0,g.scrollPoints.length=1,g.isMomentum||A()):g.isStartPublished||E()},E=function(){g.axisVelocity=n(g.scrollPointsToMerge).axisDelta.map((function(t){return t/g.willEndTimeout}))},j=function(){var t=g.scrollPoints,e=t[0],n=t[1];if(n&&e){var i=e.timeStamp-n.timeStamp;if(!(i<=0)){var r=e.axisDeltaSum.map((function(t){return t/i})),o=r.map((function(t,e){return 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