@studio-freight/lenis/dist/lenis.mjs.map

Lenis is a smooth scroll library to normalize and smooth the scrolling experience across devices

{"version":3,"file":"lenis.mjs","sources":["../src/maths.js","../src/animate.js","../src/dimensions.js","../src/debounce.js","../src/emitter.js","../src/virtual-scroll.js","../../src/index.ts"],"sourcesContent":["// Clamp a value between a minimum and maximum value\r\nexport function clamp(min, input, max) {\r\n  return Math.max(min, Math.min(input, max))\r\n}\r\n\r\n// Truncate a floating-point number to a specified number of decimal places\r\nexport function truncate(value, decimals = 0) {\r\n  return parseFloat(value.toFixed(decimals))\r\n}\r\n\r\n// Linearly interpolate between two values using an amount (0 <= t <= 1)\r\nexport function lerp(x, y, t) {\r\n  return (1 - t) * x + t * y\r\n}\r\n\r\n// http://www.rorydriscoll.com/2016/03/07/frame-rate-independent-damping-using-lerp/\r\nexport function damp(x, y, lambda, dt) {\r\n  return lerp(x, y, 1 - Math.exp(-lambda * dt))\r\n}\r\n\r\n// Calculate the modulo of the dividend and divisor while keeping the result within the same sign as the divisor\r\n// https://anguscroll.com/just/just-modulo\r\nexport function modulo(n, d) {\r\n  return ((n % d) + d) % d\r\n}\r\n","import { clamp, damp } from './maths'\r\n\r\n// Animate class to handle value animations with lerping or easing\r\nexport class Animate {\r\n  // Advance the animation by the given delta time\r\n  advance(deltaTime) {\r\n    if (!this.isRunning) return\r\n\r\n    let completed = false\r\n\r\n    if (this.lerp) {\r\n      this.value = damp(this.value, this.to, this.lerp * 60, deltaTime)\r\n      if (Math.round(this.value) === this.to) {\r\n        this.value = this.to\r\n        completed = true\r\n      }\r\n    } else {\r\n      this.currentTime += deltaTime\r\n      const linearProgress = clamp(0, this.currentTime / this.duration, 1)\r\n\r\n      completed = linearProgress >= 1\r\n      const easedProgress = completed ? 1 : this.easing(linearProgress)\r\n      this.value = this.from + (this.to - this.from) * easedProgress\r\n    }\r\n\r\n    // Call the onUpdate callback with the current value and completed status\r\n    this.onUpdate?.(this.value, completed)\r\n\r\n    if (completed) {\r\n      this.stop()\r\n    }\r\n  }\r\n\r\n  // Stop the animation\r\n  stop() {\r\n    this.isRunning = false\r\n  }\r\n\r\n  // Set up the animation from a starting value to an ending value\r\n  // with optional parameters for lerping, duration, easing, and onUpdate callback\r\n  fromTo(\r\n    from,\r\n    to,\r\n    { lerp = 0.1, duration = 1, easing = (t) => t, onStart, onUpdate }\r\n  ) {\r\n    this.from = this.value = from\r\n    this.to = to\r\n    this.lerp = lerp\r\n    this.duration = duration\r\n    this.easing = easing\r\n    this.currentTime = 0\r\n    this.isRunning = true\r\n\r\n    onStart?.()\r\n    this.onUpdate = onUpdate\r\n  }\r\n}\r\n","import { debounce } from './debounce'\r\n\r\nexport class Dimensions {\r\n  constructor({\r\n    wrapper,\r\n    content,\r\n    autoResize = true,\r\n    debounce: debounceValue = 250,\r\n  } = {}) {\r\n    this.wrapper = wrapper\r\n    this.content = content\r\n\r\n    if (autoResize) {\r\n      this.debouncedResize = debounce(this.resize, debounceValue)\r\n\r\n      if (this.wrapper === window) {\r\n        window.addEventListener('resize', this.debouncedResize, false)\r\n      } else {\r\n        this.wrapperResizeObserver = new ResizeObserver(this.debouncedResize)\r\n        this.wrapperResizeObserver.observe(this.wrapper)\r\n      }\r\n\r\n      this.contentResizeObserver = new ResizeObserver(this.debouncedResize)\r\n      this.contentResizeObserver.observe(this.content)\r\n    }\r\n\r\n    this.resize()\r\n  }\r\n\r\n  destroy() {\r\n    this.wrapperResizeObserver?.disconnect()\r\n    this.contentResizeObserver?.disconnect()\r\n    window.removeEventListener('resize', this.debouncedResize, false)\r\n  }\r\n\r\n  resize = () => {\r\n    this.onWrapperResize()\r\n    this.onContentResize()\r\n  }\r\n\r\n  onWrapperResize = () => {\r\n    if (this.wrapper === window) {\r\n      this.width = window.innerWidth\r\n      this.height = window.innerHeight\r\n    } else {\r\n      this.width = this.wrapper.clientWidth\r\n      this.height = this.wrapper.clientHeight\r\n    }\r\n  }\r\n\r\n  onContentResize = () => {\r\n    if (this.wrapper === window) {\r\n      this.scrollHeight = this.content.scrollHeight\r\n      this.scrollWidth = this.content.scrollWidth\r\n    } else {\r\n      this.scrollHeight = this.wrapper.scrollHeight\r\n      this.scrollWidth = this.wrapper.scrollWidth\r\n    }\r\n  }\r\n\r\n  get limit() {\r\n    return {\r\n      x: this.scrollWidth - this.width,\r\n      y: this.scrollHeight - this.height,\r\n    }\r\n  }\r\n}\r\n","export function debounce(callback, delay) {\r\n  let timer\r\n  return function () {\r\n    let args = arguments\r\n    let context = this\r\n    clearTimeout(timer)\r\n    timer = setTimeout(function () {\r\n      callback.apply(context, args)\r\n    }, delay)\r\n  }\r\n}\r\n","export class Emitter {\r\n  constructor() {\r\n    this.events = {}\r\n  }\r\n\r\n  emit(event, ...args) {\r\n    let callbacks = this.events[event] || []\r\n    for (let i = 0, length = callbacks.length; i < length; i++) {\r\n      callbacks[i](...args)\r\n    }\r\n  }\r\n\r\n  on(event, cb) {\r\n    // Add the callback to the event's callback list, or create a new list with the callback\r\n    this.events[event]?.push(cb) || (this.events[event] = [cb])\r\n\r\n    // Return an unsubscribe function\r\n    return () => {\r\n      this.events[event] = this.events[event]?.filter((i) => cb !== i)\r\n    }\r\n  }\r\n\r\n  off(event, callback) {\r\n    this.events[event] = this.events[event]?.filter((i) => callback !== i)\r\n  }\r\n\r\n  destroy() {\r\n    this.events = {}\r\n  }\r\n}\r\n","import { Emitter } from './emitter'\r\n\r\nconst LINE_HEIGHT = 100 / 6\r\n\r\nexport class VirtualScroll {\r\n  constructor(element, { wheelMultiplier = 1, touchMultiplier = 1 }) {\r\n    this.element = element\r\n    this.wheelMultiplier = wheelMultiplier\r\n    this.touchMultiplier = touchMultiplier\r\n\r\n    this.touchStart = {\r\n      x: null,\r\n      y: null,\r\n    }\r\n\r\n    this.emitter = new Emitter()\r\n    window.addEventListener('resize', this.onWindowResize, false)\r\n    this.onWindowResize()\r\n\r\n    this.element.addEventListener('wheel', this.onWheel, { passive: false })\r\n    this.element.addEventListener('touchstart', this.onTouchStart, {\r\n      passive: false,\r\n    })\r\n    this.element.addEventListener('touchmove', this.onTouchMove, {\r\n      passive: false,\r\n    })\r\n    this.element.addEventListener('touchend', this.onTouchEnd, {\r\n      passive: false,\r\n    })\r\n  }\r\n\r\n  // Add an event listener for the given event and callback\r\n  on(event, callback) {\r\n    return this.emitter.on(event, callback)\r\n  }\r\n\r\n  // Remove all event listeners and clean up\r\n  destroy() {\r\n    this.emitter.destroy()\r\n\r\n    window.removeEventListener('resize', this.onWindowResize, false)\r\n\r\n    this.element.removeEventListener('wheel', this.onWheel, {\r\n      passive: false,\r\n    })\r\n    this.element.removeEventListener('touchstart', this.onTouchStart, {\r\n      passive: false,\r\n    })\r\n    this.element.removeEventListener('touchmove', this.onTouchMove, {\r\n      passive: false,\r\n    })\r\n    this.element.removeEventListener('touchend', this.onTouchEnd, {\r\n      passive: false,\r\n    })\r\n  }\r\n\r\n  // Event handler for 'touchstart' event\r\n  onTouchStart = (event) => {\r\n    const { clientX, clientY } = event.targetTouches\r\n      ? event.targetTouches[0]\r\n      : event\r\n\r\n    this.touchStart.x = clientX\r\n    this.touchStart.y = clientY\r\n\r\n    this.lastDelta = {\r\n      x: 0,\r\n      y: 0,\r\n    }\r\n\r\n    this.emitter.emit('scroll', {\r\n      deltaX: 0,\r\n      deltaY: 0,\r\n      event,\r\n    })\r\n  }\r\n\r\n  // Event handler for 'touchmove' event\r\n  onTouchMove = (event) => {\r\n    const { clientX, clientY } = event.targetTouches\r\n      ? event.targetTouches[0]\r\n      : event\r\n\r\n    const deltaX = -(clientX - this.touchStart.x) * this.touchMultiplier\r\n    const deltaY = -(clientY - this.touchStart.y) * this.touchMultiplier\r\n\r\n    this.touchStart.x = clientX\r\n    this.touchStart.y = clientY\r\n\r\n    this.lastDelta = {\r\n      x: deltaX,\r\n      y: deltaY,\r\n    }\r\n\r\n    this.emitter.emit('scroll', {\r\n      deltaX,\r\n      deltaY,\r\n      event,\r\n    })\r\n  }\r\n\r\n  onTouchEnd = (event) => {\r\n    this.emitter.emit('scroll', {\r\n      deltaX: this.lastDelta.x,\r\n      deltaY: this.lastDelta.y,\r\n      event,\r\n    })\r\n  }\r\n\r\n  // Event handler for 'wheel' event\r\n  onWheel = (event) => {\r\n    let { deltaX, deltaY, deltaMode } = event\r\n\r\n    const multiplierX =\r\n      deltaMode === 1 ? LINE_HEIGHT : deltaMode === 2 ? this.windowWidth : 1\r\n    const multiplierY =\r\n      deltaMode === 1 ? LINE_HEIGHT : deltaMode === 2 ? this.windowHeight : 1\r\n\r\n    deltaX *= multiplierX\r\n    deltaY *= multiplierY\r\n\r\n    deltaX *= this.wheelMultiplier\r\n    deltaY *= this.wheelMultiplier\r\n\r\n    this.emitter.emit('scroll', { deltaX, deltaY, event })\r\n  }\r\n\r\n  onWindowResize = () => {\r\n    this.windowWidth = window.innerWidth\r\n    this.windowHeight = window.innerHeight\r\n  }\r\n}\r\n","import { version } from '../package.json'\r\nimport { Animate } from './animate'\r\nimport { Dimensions } from './dimensions'\r\nimport { Emitter } from './emitter'\r\nimport { clamp, modulo } from './maths'\r\nimport { VirtualScroll } from './virtual-scroll'\r\n\r\n// Technical explanation\r\n// - listen to 'wheel' events\r\n// - prevent 'wheel' event to prevent scroll\r\n// - normalize wheel delta\r\n// - add delta to targetScroll\r\n// - animate scroll to targetScroll (smooth context)\r\n// - if animation is not running, listen to 'scroll' events (native context)\r\n\r\ntype EasingFunction = (t: number) => number\r\ntype Orientation = 'vertical' | 'horizontal'\r\ntype GestureOrientation = 'vertical' | 'horizontal' | 'both'\r\n\r\nexport type LenisOptions = {\r\n  wrapper?: Window | HTMLElement\r\n  content?: HTMLElement\r\n  wheelEventsTarget?: Window | HTMLElement\r\n  eventsTarget?: Window | HTMLElement\r\n  smoothWheel?: boolean\r\n  syncTouch?: boolean\r\n  syncTouchLerp?: number\r\n  touchInertiaMultiplier?: number\r\n  duration?: number\r\n  easing?: EasingFunction\r\n  lerp?: number\r\n  infinite?: boolean\r\n  orientation?: Orientation\r\n  gestureOrientation?: GestureOrientation\r\n  touchMultiplier?: number\r\n  wheelMultiplier?: number\r\n  autoResize?: boolean\r\n  __experimental__naiveDimensions?: boolean\r\n}\r\n\r\nexport default class Lenis {\r\n  __isSmooth: boolean = false // true if scroll should be animated\r\n  __isScrolling: boolean = false // true when scroll is animating\r\n  __isStopped: boolean = false // true if user should not be able to scroll - enable/disable programmatically\r\n  __isLocked: boolean = false // same as isStopped but enabled/disabled when scroll reaches target\r\n\r\n  constructor({\r\n    wrapper = window,\r\n    content = document.documentElement,\r\n    wheelEventsTarget = wrapper, // deprecated\r\n    eventsTarget = wheelEventsTarget,\r\n    smoothWheel = true,\r\n    syncTouch = false,\r\n    syncTouchLerp = 0.075,\r\n    touchInertiaMultiplier = 35,\r\n    duration, // in seconds\r\n    easing = (t) => Math.min(1, 1.001 - Math.pow(2, -10 * t)),\r\n    lerp = !duration && 0.1,\r\n    infinite = false,\r\n    orientation = 'vertical', // vertical, horizontal\r\n    gestureOrientation = 'vertical', // vertical, horizontal, both\r\n    touchMultiplier = 1,\r\n    wheelMultiplier = 1,\r\n    autoResize = true,\r\n    __experimental__naiveDimensions = false,\r\n  }: LenisOptions = {}) {\r\n    window.lenisVersion = version\r\n\r\n    // if wrapper is html or body, fallback to window\r\n    if (wrapper === document.documentElement || wrapper === document.body) {\r\n      wrapper = window\r\n    }\r\n\r\n    this.options = {\r\n      wrapper,\r\n      content,\r\n      wheelEventsTarget,\r\n      eventsTarget,\r\n      smoothWheel,\r\n      syncTouch,\r\n      syncTouchLerp,\r\n      touchInertiaMultiplier,\r\n      duration,\r\n      easing,\r\n      lerp,\r\n      infinite,\r\n      gestureOrientation,\r\n      orientation,\r\n      touchMultiplier,\r\n      wheelMultiplier,\r\n      autoResize,\r\n      __experimental__naiveDimensions,\r\n    }\r\n\r\n    this.animate = new Animate()\r\n    this.emitter = new Emitter()\r\n    this.dimensions = new Dimensions({ wrapper, content, autoResize })\r\n    this.toggleClassName('lenis', true)\r\n\r\n    this.velocity = 0\r\n    this.isLocked = false\r\n    this.isStopped = false\r\n    this.isSmooth = syncTouch || smoothWheel\r\n    this.isScrolling = false\r\n    this.targetScroll = this.animatedScroll = this.actualScroll\r\n\r\n    this.options.wrapper.addEventListener('scroll', this.onNativeScroll, false)\r\n\r\n    this.virtualScroll = new VirtualScroll(eventsTarget, {\r\n      touchMultiplier,\r\n      wheelMultiplier,\r\n    })\r\n    this.virtualScroll.on('scroll', this.onVirtualScroll)\r\n  }\r\n\r\n  destroy() {\r\n    this.emitter.destroy()\r\n\r\n    this.options.wrapper.removeEventListener(\r\n      'scroll',\r\n      this.onNativeScroll,\r\n      false\r\n    )\r\n\r\n    this.virtualScroll.destroy()\r\n    this.dimensions.destroy()\r\n\r\n    this.toggleClassName('lenis', false)\r\n    this.toggleClassName('lenis-smooth', false)\r\n    this.toggleClassName('lenis-scrolling', false)\r\n    this.toggleClassName('lenis-stopped', false)\r\n    this.toggleClassName('lenis-locked', false)\r\n  }\r\n\r\n  on(event: string, callback: Function) {\r\n    return this.emitter.on(event, callback)\r\n  }\r\n\r\n  off(event: string, callback: Function) {\r\n    return this.emitter.off(event, callback)\r\n  }\r\n\r\n  private setScroll(scroll) {\r\n    // apply scroll value immediately\r\n    if (this.isHorizontal) {\r\n      this.rootElement.scrollLeft = scroll\r\n    } else {\r\n      this.rootElement.scrollTop = scroll\r\n    }\r\n  }\r\n\r\n  private onVirtualScroll = ({ deltaX, deltaY, event }) => {\r\n    // keep zoom feature\r\n    if (event.ctrlKey) return\r\n\r\n    const isTouch = event.type.includes('touch')\r\n    const isWheel = event.type.includes('wheel')\r\n\r\n    const isTapToStop =\r\n      this.options.syncTouch &&\r\n      isTouch &&\r\n      event.type === 'touchstart' &&\r\n      !this.isStopped &&\r\n      !this.isLocked\r\n\r\n    if (isTapToStop) {\r\n      this.reset()\r\n      return\r\n    }\r\n\r\n    const isClick = deltaX === 0 && deltaY === 0 // click event\r\n\r\n    // const isPullToRefresh =\r\n    //   this.options.gestureOrientation === 'vertical' &&\r\n    //   this.scroll === 0 &&\r\n    //   !this.options.infinite &&\r\n    //   deltaY <= 5 // touch pull to refresh, not reliable yet\r\n\r\n    const isUnknownGesture =\r\n      (this.options.gestureOrientation === 'vertical' && deltaY === 0) ||\r\n      (this.options.gestureOrientation === 'horizontal' && deltaX === 0)\r\n\r\n    if (isClick || isUnknownGesture) {\r\n      // console.log('prevent')\r\n      return\r\n    }\r\n\r\n    // catch if scrolling on nested scroll elements\r\n    let composedPath = event.composedPath()\r\n    composedPath = composedPath.slice(0, composedPath.indexOf(this.rootElement)) // remove parents elements\r\n\r\n    if (\r\n      !!composedPath.find(\r\n        (node) =>\r\n          node.hasAttribute?.('data-lenis-prevent') ||\r\n          (isTouch && node.hasAttribute?.('data-lenis-prevent-touch')) ||\r\n          (isWheel && node.hasAttribute?.('data-lenis-prevent-wheel')) ||\r\n          (node.classList?.contains('lenis') &&\r\n            !node.classList?.contains('lenis-stopped')) // nested lenis instance\r\n      )\r\n    )\r\n      return\r\n\r\n    if (this.isStopped || this.isLocked) {\r\n      event.preventDefault() // this will stop forwarding the event to the parent, this is problematic\r\n      return\r\n    }\r\n\r\n    this.isSmooth =\r\n      (this.options.syncTouch && isTouch) ||\r\n      (this.options.smoothWheel && isWheel)\r\n\r\n    if (!this.isSmooth) {\r\n      this.isScrolling = false\r\n      this.animate.stop()\r\n      return\r\n    }\r\n\r\n    event.preventDefault()\r\n\r\n    let delta = deltaY\r\n    if (this.options.gestureOrientation === 'both') {\r\n      delta = Math.abs(deltaY) > Math.abs(deltaX) ? deltaY : deltaX\r\n    } else if (this.options.gestureOrientation === 'horizontal') {\r\n      delta = deltaX\r\n    }\r\n\r\n    const syncTouch = isTouch && this.options.syncTouch\r\n    const isTouchEnd = isTouch && event.type === 'touchend'\r\n\r\n    const hasTouchInertia = isTouchEnd && Math.abs(delta) > 5\r\n\r\n    if (hasTouchInertia) {\r\n      delta = this.velocity * this.options.touchInertiaMultiplier\r\n    }\r\n\r\n    this.scrollTo(this.targetScroll + delta, {\r\n      programmatic: false,\r\n      ...(syncTouch\r\n        ? {\r\n            lerp: hasTouchInertia ? this.options.syncTouchLerp : 1,\r\n          }\r\n        : {\r\n            lerp: this.options.lerp,\r\n            duration: this.options.duration,\r\n            easing: this.options.easing,\r\n          }),\r\n    })\r\n  }\r\n\r\n  resize() {\r\n    this.dimensions.resize()\r\n  }\r\n\r\n  private emit() {\r\n    this.emitter.emit('scroll', this)\r\n  }\r\n\r\n  private onNativeScroll = () => {\r\n    if (this.__preventNextScrollEvent) return\r\n\r\n    if (!this.isScrolling) {\r\n      const lastScroll = this.animatedScroll\r\n      this.animatedScroll = this.targetScroll = this.actualScroll\r\n      this.velocity = 0\r\n      this.direction = Math.sign(this.animatedScroll - lastScroll)\r\n      this.emit()\r\n    }\r\n  }\r\n\r\n  private reset() {\r\n    this.isLocked = false\r\n    this.isScrolling = false\r\n    this.animatedScroll = this.targetScroll = this.actualScroll\r\n    this.velocity = 0\r\n    this.animate.stop()\r\n  }\r\n\r\n  start() {\r\n    if (!this.isStopped) return\r\n    this.isStopped = false\r\n\r\n    this.reset()\r\n  }\r\n\r\n  stop() {\r\n    if (this.isStopped) return\r\n    this.isStopped = true\r\n    this.animate.stop()\r\n\r\n    this.reset()\r\n  }\r\n\r\n  raf(time: number) {\r\n    const deltaTime = time - (this.time || time)\r\n    this.time = time\r\n\r\n    this.animate.advance(deltaTime * 0.001)\r\n  }\r\n\r\n  scrollTo(\r\n    target: number | string | HTMLElement,\r\n    {\r\n      offset = 0,\r\n      immediate = false,\r\n      lock = false,\r\n      duration = this.options.duration,\r\n      easing = this.options.easing,\r\n      lerp = !duration && this.options.lerp,\r\n      onComplete,\r\n      force = false, // scroll even if stopped\r\n      programmatic = true, // called from outside of the class\r\n    }: {\r\n      offset?: number\r\n      immediate?: boolean\r\n      lock?: boolean\r\n      duration?: number\r\n      easing?: EasingFunction\r\n      lerp?: number\r\n      onComplete?: (lenis: Lenis) => void\r\n      force?: boolean\r\n      programmatic?: boolean\r\n    } = {}\r\n  ) {\r\n    if ((this.isStopped || this.isLocked) && !force) return\r\n\r\n    // keywords\r\n    if (['top', 'left', 'start'].includes(target)) {\r\n      target = 0\r\n    } else if (['bottom', 'right', 'end'].includes(target)) {\r\n      target = this.limit\r\n    } else {\r\n      let node\r\n\r\n      if (typeof target === 'string') {\r\n        // CSS selector\r\n        node = document.querySelector(target)\r\n      } else if (target?.nodeType) {\r\n        // Node element\r\n        node = target\r\n      }\r\n\r\n      if (node) {\r\n        if (this.options.wrapper !== window) {\r\n          // nested scroll offset correction\r\n          const wrapperRect = this.options.wrapper.getBoundingClientRect()\r\n          offset -= this.isHorizontal ? wrapperRect.left : wrapperRect.top\r\n        }\r\n\r\n        const rect = node.getBoundingClientRect()\r\n\r\n        target =\r\n          (this.isHorizontal ? rect.left : rect.top) + this.animatedScroll\r\n      }\r\n    }\r\n\r\n    if (typeof target !== 'number') return\r\n\r\n    target += offset\r\n    target = Math.round(target)\r\n\r\n    if (this.options.infinite) {\r\n      if (programmatic) {\r\n        this.targetScroll = this.animatedScroll = this.scroll\r\n      }\r\n    } else {\r\n      target = clamp(0, target, this.limit)\r\n    }\r\n\r\n    if (immediate) {\r\n      this.animatedScroll = this.targetScroll = target\r\n      this.setScroll(this.scroll)\r\n      this.reset()\r\n      onComplete?.(this)\r\n      return\r\n    }\r\n\r\n    if (!programmatic) {\r\n      if (target === this.targetScroll) return\r\n\r\n      this.targetScroll = target\r\n    }\r\n\r\n    this.animate.fromTo(this.animatedScroll, target, {\r\n      duration,\r\n      easing,\r\n      lerp,\r\n      onStart: () => {\r\n        // started\r\n        if (lock) this.isLocked = true\r\n        this.isScrolling = true\r\n      },\r\n      onUpdate: (value: number, completed: boolean) => {\r\n        this.isScrolling = true\r\n\r\n        // updated\r\n        this.velocity = value - this.animatedScroll\r\n        this.direction = Math.sign(this.velocity)\r\n\r\n        this.animatedScroll = value\r\n        this.setScroll(this.scroll)\r\n\r\n        if (programmatic) {\r\n          // wheel during programmatic should stop it\r\n          this.targetScroll = value\r\n        }\r\n\r\n        if (!completed) this.emit()\r\n\r\n        if (completed) {\r\n          this.reset()\r\n          this.emit()\r\n          onComplete?.(this)\r\n\r\n          // avoid emitting event twice\r\n          this.__preventNextScrollEvent = true\r\n          requestAnimationFrame(() => {\r\n            delete this.__preventNextScrollEvent\r\n          })\r\n        }\r\n      },\r\n    })\r\n  }\r\n\r\n  get rootElement() {\r\n    return this.options.wrapper === window\r\n      ? document.documentElement\r\n      : this.options.wrapper\r\n  }\r\n\r\n  get limit() {\r\n    if (this.options.__experimental__naiveDimensions) {\r\n      if (this.isHorizontal) {\r\n        return this.rootElement.scrollWidth - this.rootElement.clientWidth\r\n      } else {\r\n        return this.rootElement.scrollHeight - this.rootElement.clientHeight\r\n      }\r\n    } else {\r\n      return this.dimensions.limit[this.isHorizontal ? 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boolean) {\r\n    this.rootElement.classList.toggle(name, value)\r\n    this.emitter.emit('className change', this)\r\n  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