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Filename : lenis.min.js
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var t,e;t=this,e=function(){function t(t,e,i){return Math.max(t,Math.min(e,i))}class e{advance(e){if(!this.isRunning)return;let i=!1;if(this.lerp)this.value=(s=this.value,o=this.to,n=60*this.lerp,r=e,function(t,e,i){return(1-i)*t+i*e}(s,o,1-Math.exp(-n*r))),Math.round(this.value)===this.to&&(this.value=this.to,i=!0);else{this.currentTime+=e;const s=t(0,this.currentTime/this.duration,1);i=s>=1;const o=i?1:this.easing(s);this.value=this.from+(this.to-this.from)*o}var s,o,n,r;this.onUpdate?.(this.value,i),i&&this.stop()}stop(){this.isRunning=!1}fromTo(t,e,{lerp:i=.1,duration:s=1,easing:o=(t=>t),onStart:n,onUpdate:r}){this.from=this.value=t,this.to=e,this.lerp=i,this.duration=s,this.easing=o,this.currentTime=0,this.isRunning=!0,n?.(),this.onUpdate=r}}class i{constructor({wrapper:t,content:e,autoResize:i=!0}={}){if(this.wrapper=t,this.content=e,i){const t=function(t,e){let i;return function(){let e=arguments,s=this;clearTimeout(i),i=setTimeout((function(){t.apply(s,e)}),250)}}(this.resize);this.wrapper!==window&&(this.wrapperResizeObserver=new ResizeObserver(t),this.wrapperResizeObserver.observe(this.wrapper)),this.contentResizeObserver=new ResizeObserver(t),this.contentResizeObserver.observe(this.content)}this.resize()}destroy(){this.wrapperResizeObserver?.disconnect(),this.contentResizeObserver?.disconnect()}resize=()=>{this.onWrapperResize(),this.onContentResize()};onWrapperResize=()=>{this.wrapper===window?(this.width=window.innerWidth,this.height=window.innerHeight):(this.width=this.wrapper.clientWidth,this.height=this.wrapper.clientHeight)};onContentResize=()=>{this.scrollHeight=this.content.scrollHeight,this.scrollWidth=this.content.scrollWidth};get limit(){return{x:this.scrollWidth-this.width,y:this.scrollHeight-this.height}}}class s{constructor(){this.events={}}emit(t,...e){let i=this.events[t]||[];for(let t=0,s=i.length;t<s;t++)i[t](...e)}on(t,e){return this.events[t]?.push(e)||(this.events[t]=[e]),()=>{this.events[t]=this.events[t]?.filter((t=>e!==t))}}off(t,e){this.events[t]=this.events[t]?.filter((t=>e!==t))}destroy(){this.events={}}}class o{constructor(t,{wheelMultiplier:e=1,touchMultiplier:i=2,normalizeWheel:o=!1}){this.element=t,this.wheelMultiplier=e,this.touchMultiplier=i,this.normalizeWheel=o,this.touchStart={x:null,y:null},this.emitter=new s,this.element.addEventListener("wheel",this.onWheel,{passive:!1}),this.element.addEventListener("touchstart",this.onTouchStart,{passive:!1}),this.element.addEventListener("touchmove",this.onTouchMove,{passive:!1}),this.element.addEventListener("touchend",this.onTouchEnd,{passive:!1})}on(t,e){return this.emitter.on(t,e)}destroy(){this.emitter.destroy(),this.element.removeEventListener("wheel",this.onWheel,{passive:!1}),this.element.removeEventListener("touchstart",this.onTouchStart,{passive:!1}),this.element.removeEventListener("touchmove",this.onTouchMove,{passive:!1}),this.element.removeEventListener("touchend",this.onTouchEnd,{passive:!1})}onTouchStart=t=>{const{clientX:e,clientY:i}=t.targetTouches?t.targetTouches[0]:t;this.touchStart.x=e,this.touchStart.y=i,this.lastDelta={x:0,y:0},this.emitter.emit("scroll",{deltaX:0,deltaY:0,event:t})};onTouchMove=t=>{const{clientX:e,clientY:i}=t.targetTouches?t.targetTouches[0]:t,s=-(e-this.touchStart.x)*this.touchMultiplier,o=-(i-this.touchStart.y)*this.touchMultiplier;this.touchStart.x=e,this.touchStart.y=i,this.lastDelta={x:s,y:o},this.emitter.emit("scroll",{deltaX:s,deltaY:o,event:t})};onTouchEnd=t=>{this.emitter.emit("scroll",{deltaX:this.lastDelta.x,deltaY:this.lastDelta.y,event:t})};onWheel=e=>{let{deltaX:i,deltaY:s}=e;this.normalizeWheel&&(i=t(-100,i,100),s=t(-100,s,100)),i*=this.wheelMultiplier,s*=this.wheelMultiplier,this.emitter.emit("scroll",{deltaX:i,deltaY:s,event:e})}}return class{constructor({wrapper:t=window,content:n=document.documentElement,wheelEventsTarget:r=t,eventsTarget:l=r,smoothWheel:h=!0,smoothTouch:a=!1,syncTouch:c=!1,syncTouchLerp:p=.075,touchInertiaMultiplier:u=35,duration:d,easing:m=(t=>Math.min(1,1.001-Math.pow(2,-10*t))),lerp:g=!d&&.1,infinite:v=!1,orientation:S="vertical",gestureOrientation:f="vertical",touchMultiplier:w=1,wheelMultiplier:y=1,normalizeWheel:T=!1,autoResize:z=!0}={}){window.lenisVersion="1.0.33",t!==document.documentElement&&t!==document.body||(t=window),this.options={wrapper:t,content:n,wheelEventsTarget:r,eventsTarget:l,smoothWheel:h,smoothTouch:a,syncTouch:c,syncTouchLerp:p,touchInertiaMultiplier:u,duration:d,easing:m,lerp:g,infinite:v,gestureOrientation:f,orientation:S,touchMultiplier:w,wheelMultiplier:y,normalizeWheel:T,autoResize:z},this.animate=new e,this.emitter=new s,this.dimensions=new i({wrapper:t,content:n,autoResize:z}),this.toggleClass("lenis",!0),this.velocity=0,this.isLocked=!1,this.isStopped=!1,this.isSmooth=c||h||a,this.isScrolling=!1,this.targetScroll=this.animatedScroll=this.actualScroll,this.options.wrapper.addEventListener("scroll",this.onNativeScroll,{passive:!1}),this.virtualScroll=new o(l,{touchMultiplier:w,wheelMultiplier:y,normalizeWheel:T}),this.virtualScroll.on("scroll",this.onVirtualScroll)}destroy(){this.emitter.destroy(),this.options.wrapper.removeEventListener("scroll",this.onNativeScroll,{passive:!1}),this.virtualScroll.destroy(),this.dimensions.destroy(),this.toggleClass("lenis",!1),this.toggleClass("lenis-smooth",!1),this.toggleClass("lenis-scrolling",!1),this.toggleClass("lenis-stopped",!1),this.toggleClass("lenis-locked",!1)}on(t,e){return this.emitter.on(t,e)}off(t,e){return this.emitter.off(t,e)}setScroll(t){this.isHorizontal?this.rootElement.scrollLeft=t:this.rootElement.scrollTop=t}onVirtualScroll=({deltaX:t,deltaY:e,event:i})=>{if(i.ctrlKey)return;const s=i.type.includes("touch"),o=i.type.includes("wheel");if((this.options.smoothTouch||this.options.syncTouch)&&s&&"touchstart"===i.type)return void this.reset();const n=0===t&&0===e,r="vertical"===this.options.gestureOrientation&&0===e||"horizontal"===this.options.gestureOrientation&&0===t;if(n||r)return;let l=i.composedPath();if(l=l.slice(0,l.indexOf(this.rootElement)),l.find((t=>t.hasAttribute?.("data-lenis-prevent")||s&&t.hasAttribute?.("data-lenis-prevent-touch")||o&&t.hasAttribute?.("data-lenis-prevent-wheel")||t.classList?.contains("lenis"))))return;if(this.isStopped||this.isLocked)return void i.preventDefault();if(this.isSmooth=(this.options.smoothTouch||this.options.syncTouch)&&s||this.options.smoothWheel&&o,!this.isSmooth)return this.isScrolling=!1,void this.animate.stop();i.preventDefault();let h=e;"both"===this.options.gestureOrientation?h=Math.abs(e)>Math.abs(t)?e:t:"horizontal"===this.options.gestureOrientation&&(h=t);const a=s&&this.options.syncTouch,c=s&&"touchend"===i.type&&Math.abs(h)>5;c&&(h=this.velocity*this.options.touchInertiaMultiplier),this.scrollTo(this.targetScroll+h,{programmatic:!1,...a?{lerp:c?this.options.syncTouchLerp:1}:{lerp:this.options.lerp,duration:this.options.duration,easing:this.options.easing}})};resize(){this.dimensions.resize()}emit(){this.emitter.emit("scroll",this)}onNativeScroll=()=>{if(!this.__preventNextScrollEvent&&!this.isScrolling){const t=this.animatedScroll;this.animatedScroll=this.targetScroll=this.actualScroll,this.velocity=0,this.direction=Math.sign(this.animatedScroll-t),this.emit()}};reset(){this.isLocked=!1,this.isScrolling=!1,this.animatedScroll=this.targetScroll=this.actualScroll,this.velocity=0,this.animate.stop()}start(){this.isStopped=!1,this.reset()}stop(){this.isStopped=!0,this.animate.stop(),this.reset()}raf(t){const e=t-(this.time||t);this.time=t,this.animate.advance(.001*e)}scrollTo(e,{offset:i=0,immediate:s=!1,lock:o=!1,duration:n=this.options.duration,easing:r=this.options.easing,lerp:l=!n&&this.options.lerp,onComplete:h=null,force:a=!1,programmatic:c=!0}={}){if(!this.isStopped&&!this.isLocked||a){if(["top","left","start"].includes(e))e=0;else if(["bottom","right","end"].includes(e))e=this.limit;else{let t;if("string"==typeof e?t=document.querySelector(e):e?.nodeType&&(t=e),t){if(this.options.wrapper!==window){const t=this.options.wrapper.getBoundingClientRect();i-=this.isHorizontal?t.left:t.top}const s=t.getBoundingClientRect();e=(this.isHorizontal?s.left:s.top)+this.animatedScroll}}if("number"==typeof e){if(e+=i,e=Math.round(e),this.options.infinite?c&&(this.targetScroll=this.animatedScroll=this.scroll):e=t(0,e,this.limit),s)return this.animatedScroll=this.targetScroll=e,this.setScroll(this.scroll),this.reset(),void h?.(this);if(!c){if(e===this.targetScroll)return;this.targetScroll=e}this.animate.fromTo(this.animatedScroll,e,{duration:n,easing:r,lerp:l,onStart:()=>{o&&(this.isLocked=!0),this.isScrolling=!0},onUpdate:(t,e)=>{this.isScrolling=!0,this.velocity=t-this.animatedScroll,this.direction=Math.sign(this.velocity),this.animatedScroll=t,this.setScroll(this.scroll),c&&(this.targetScroll=t),e||this.emit(),e&&(this.reset(),this.emit(),h?.(this),this.__preventNextScrollEvent=!0,requestAnimationFrame((()=>{delete this.__preventNextScrollEvent})))}})}}}get rootElement(){return this.options.wrapper===window?document.documentElement:this.options.wrapper}get limit(){return this.dimensions.limit[this.isHorizontal?"x":"y"]}get isHorizontal(){return"horizontal"===this.options.orientation}get actualScroll(){return this.isHorizontal?this.rootElement.scrollLeft:this.rootElement.scrollTop}get scroll(){return this.options.infinite?(this.animatedScroll%(t=this.limit)+t)%t:this.animatedScroll;var t}get progress(){return 0===this.limit?1:this.scroll/this.limit}get isSmooth(){return this.__isSmooth}set isSmooth(t){this.__isSmooth!==t&&(this.__isSmooth=t,this.toggleClass("lenis-smooth",t))}get isScrolling(){return this.__isScrolling}set isScrolling(t){this.__isScrolling!==t&&(this.__isScrolling=t,this.toggleClass("lenis-scrolling",t))}get isStopped(){return this.__isStopped}set isStopped(t){this.__isStopped!==t&&(this.__isStopped=t,this.toggleClass("lenis-stopped",t))}get isLocked(){return this.__isLocked}set isLocked(t){this.__isLocked!==t&&(this.__isLocked=t,this.toggleClass("lenis-locked",t))}get className(){let t="lenis";return this.isStopped&&(t+=" lenis-stopped"),this.isLocked&&(t+=" lenis-locked"),this.isScrolling&&(t+=" lenis-scrolling"),this.isSmooth&&(t+=" lenis-smooth"),t}toggleClass(t,e){this.rootElement.classList.toggle(t,e),this.emitter.emit("className change",this)}}},"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).Lenis=e();