[![LENIS](https://assets.darkroom.engineering/lenis/header.png)](https://github.com/darkroomengineering/lenis) [![npm](https://img.shields.io/npm/v/%40studio-freight%2Flenis?colorA=000000&colorB=ff98a2 )](https://www.npmjs.com/package/@studio-freight/lenis) [![downloads](https://img.shields.io/npm/dm/%40studio-freight%2Flenis?colorA=000000&colorB=ff98a2 )](https://www.npmjs.com/package/@studio-freight/lenis) [![size](https://img.shields.io/bundlephobia/minzip/@studio-freight/lenis?label=size&colorA=000000&colorB=ff98a2)](https://bundlephobia.com/package/@studio-freight/lenis) ## Introduction This is our take on smooth scroll, lightweight, hard-working, smooth as butter scroll. See [Demo](https://lenis.darkroom.engineering/).
## Installation ### JavaScript using a package manager: ```bash npm i @studio-freight/lenis ``` ```js import Lenis from '@studio-freight/lenis' ```
using scripts: ```html ```
## Setup ### Basic: ```js const lenis = new Lenis() lenis.on('scroll', (e) => { console.log(e) }) function raf(time) { lenis.raf(time) requestAnimationFrame(raf) } requestAnimationFrame(raf) ``` ### GSAP ScrollTrigger: ```js const lenis = new Lenis() lenis.on('scroll', (e) => { console.log(e) }) lenis.on('scroll', ScrollTrigger.update) gsap.ticker.add((time)=>{ lenis.raf(time * 1000) }) gsap.ticker.lagSmoothing(0) ``` ### React: See documentation for [react-lenis](https://github.com/darkroomengineering/lenis/tree/main/packages/react-lenis).
## Instance settings | Option | Type | Default | Description | |----------------------|-----------------------|----------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `wrapper` | `HTMLElement, Window` | `window` | The element that will be used as the scroll container | | `content` | `HTMLElement` | `document.documentElement` | The element that contains the content that will be scrolled, usually `wrapper`'s direct child | | `eventsTarget` | `HTMLElement, Window` | `wrapper` | The element that will listen to `wheel` and `touch` events | | `lerp` | `number` | `0.1` | Linear interpolation (lerp) intensity (between 0 and 1) | | `duration` | `number` | `1.2` | The duration of scroll animation (in seconds). Useless if lerp defined | | `easing` | `function` | `(t) => Math.min(1, 1.001 - Math.pow(2, -10 * t))` | The easing function to use for the scroll animation, our default is custom but you can pick one from [Easings.net](https://easings.net/en). Useless if lerp defined | | `orientation` | `string` | `vertical` | The orientation of the scrolling. Can be `vertical` or `horizontal` | | `gestureOrientation` | `string` | `vertical` | The orientation of the gestures. Can be `vertical`, `horizontal` or `both` | | `smoothWheel` | `boolean` | `true` | Whether or not to enable smooth scrolling for mouse wheel events | | `syncTouch` | `boolean` | `false` | Mimic touch device scroll while allowing scroll sync (can be unstable on iOS<16) | `syncTouchLerp` | `number` | `0.075` | Lerp applied during `syncTouch` inertia | | `touchInertiaMultiplier` | `number` | `35` | Manage the the strength of `syncTouch` inertia | | `wheelMultiplier` | `number` | `1` | The multiplier to use for mouse wheel events | | `touchMultiplier` | `number` | `1` | The multiplier to use for touch events | | `normalizeWheel` | `boolean` | `false` | Normalize wheel inputs across browsers (not reliable atm) | | `infinite` | `boolean` | `false` | Enable infinite scrolling! ([See example](https://codepen.io/ClementRoche/pen/OJqBLod)) | | `autoResize` | `boolean` | `true` | Resize instance automatically based on `ResizeObserver`. If `false` you must resize manually using `.resize()` |
## Instance Props | Property | Type | Description | |-------------------------|---------------|-------------------------------------------------------------| | `animatedScroll` | `number` | Current scroll value | | `dimensions` | `object` | Dimensions instance | | `direction` | `number` | `1`: scrolling up, `-1`: scrolling down | | `emitter` | `object` | Emitter instance | | `options` | `object` | Instance options | | `targetScroll` | `number` | Target scroll value | | `time` | `number` | Time elapsed since instance creation | | `actualScroll` | `number` | Current scroll value registered by the browser | | `velocity` | `number` | Current scroll velocity | | `isHorizontal` (getter) | `boolean` | Whether or not the instance is horizontal | | `isScrolling` (getter) | `boolean` | Whether or not the scroll is being animated | | `isSmooth` (getter) | `boolean` | Whether or not the scroll is animated | | `isStopped` (getter) | `boolean` | Whether or not the user should be able to scroll | | `limit` (getter) | `number` | Maximum scroll value | | `progress` (getter) | `number` | Scroll progress from `0` to `1` | | `rootElement` (getter) | `HTMLElement` | Element on which Lenis is instanced | | `scroll` (getter) | `number` | Current scroll value (handles infinite scroll if activated) | | `className` (getter) | `string` | `rootElement` className |
## Instance Methods | Method | Description | Arguments | |-----------------------------|---------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `raf(time)` | Must be called every frame for internal usage. | `time`: in ms | | `scrollTo(target, options)` | Scroll to target. | `target`: goal to reach

`number`: value to scroll in pixels
`string`: CSS selector or keyword (`top`, `left`, `start`, `bottom`, `right`, `end`)
`HTMLElement`: DOM element

`options`

`offset`(`number`): equivalent to [`scroll-padding-top`](https://developer.mozilla.org/en-US/docs/Web/CSS/scroll-padding-top)
`lerp`(`number`): animation lerp intensity
`duration`(`number`): animation duration (in seconds)
`easing`(`function`): animation easing
`immediate`(`boolean`): ignore duration, easing and lerp
`lock`(`boolean`): whether or not to prevent the user from scrolling until the target is reached
`force`(`boolean`): reach target even if instance is stopped
`onComplete`(`function`): called when the target is reached

| | `on(id, function)` | `id` can be any of the following [instance events](#instance-events) to listen. | | | `stop()` | Pauses the scroll | | | `start()` | Resumes the scroll | | | `resize()` | Compute internal sizes, it has to be used if `autoResize` option is `false`. | | `destroy()` | Destroys the instance and removes all events. | ## Instance Events | Event | Callback Arguments | |----------|--------------------| | `scroll` | Lenis instance |
## Recommended CSS ```css html.lenis, html.lenis body { height: auto; } .lenis.lenis-smooth { scroll-behavior: auto !important; } .lenis.lenis-smooth [data-lenis-prevent] { overscroll-behavior: contain; } .lenis.lenis-stopped { overflow: hidden; } .lenis.lenis-scrolling iframe { pointer-events: none; } ```
## Considerations ### Nested scroll ```html

scroll content

``` [See modal example](https://codepen.io/ClementRoche/pen/PoLdjpw) ### Anchor links ```html scroll to anchor ```
## Limitations - no support for CSS scroll-snap - capped to 60fps on Safari ([source](https://bugs.webkit.org/show_bug.cgi?id=173434)) and 30fps on low power mode - smooth scroll will stop working over iframe since they don't forward wheel events - position fixed seems to lag on MacOS Safari pre-M1 ([source](https://github.com/darkroomengineering/lenis/issues/103))
## Tutorials - [Scroll Animation Ideas for Image Grids](https://tympanus.net/Development/ScrollAnimationsGrid/) by [Codrops](https://tympanus.net/codrops) - [How to Animate SVG Shapes on Scroll](https://tympanus.net/codrops/2022/06/08/how-to-animate-svg-shapes-on-scroll) by [Codrops](https://tympanus.net/codrops) - [The BEST smooth scrolling library for your Webflow website! (Lenis)](https://www.youtube.com/watch?v=VtCqTLRRMII) by [Diego Toda de Oliveira](https://www.diegoliv.works/) - [Easy smooth scroll in @Webflow with Lenis + GSAP ScrollTrigger tutorial](https://www.youtube.com/watch?v=gRKuzQTXq74) by [También Studio](https://www.tambien.studio/)
## Plugins - [Loconative-scroll](https://github.com/quentinhocde/loconative-scroll#how-to-switch-from-locomotive-scroll-to-loconative-scroll) by [Quentin Hocde](https://twitter.com/QuentinHocde) - [react-lenis](https://github.com/darkroomengineering/lenis/tree/main/packages/react-lenis) by [darkroom.engineering](https://darkroom.engineering/) - [r3f-scroll-rig](https://github.com/14islands/r3f-scroll-rig) by [14islands](https://14islands.com/) - [Lenis Scroll Snap Plugin](https://github.com/funkhaus/lenis-scroll-snap) by [Funkhaus](https://github.com/funkhaus) - [locomotive-scroll](https://github.com/locomotivemtl/locomotive-scroll) by [Locomotive](https://locomotive.ca/) - [vue-lenis](https://github.com/zeokku/vue-lenis) by [ZEOKKU](https://zeokku.com/) - [nuxt-lenis](https://www.npmjs.com/package/nuxt-lenis) by [Milkshake Studio](https://milkshake.studio/)
## Lenis in use - [Lunchbox](https://lunchbox.io/) by [Studio Freight](https://www.studiofreight.com/) - [Easol](https://easol.com/) by [Studio Freight](https://www.studiofreight.com/) - [Dragonfly](https://dragonfly.xyz/) by [Studio Freight](https://www.studiofreight.com/) - [Yuga Labs](https://yuga.com/) by [Antinomy Studio](https://antinomy.studio/) - [Quentin Hocde's Portfolio](https://quentinhocde.com) by [Quentin Hocde](https://twitter.com/QuentinHocde) - [Houses Of](https://housesof.world) by [Félix P.](https://flayks.com/) & [Shelby Kay](https://shelbykay.dev/) - [Shelby Kay's Portfolio](https://shelbykay.dev) by [Shelby Kay](https://shelbykay.dev/) - [Heights Agency Portfolio](https://www.heights.agency/) by [Francesco Michelini](https://www.francescomichelini.com/) - [Goodship](https://goodship.io) by [Studio Freight](https://www.studiofreight.com/) - [Flayks' Portfolio](https://flayks.com) by [Félix P.](https://flayks.com/) & [Shelby Kay](https://shelbykay.dev/) - [Matt Rothenberg's portfolio](https://mattrothenberg.com) by [Matt Rothenberg](https://twitter.com/mattrothenberg) - [Edoardo Lunardi's portfolio](https://www.edoardolunardi.dev/) by [Edoardo Lunardi](https://www.edoardolunardi.dev/) - [DeSo](https://deso.com) by [Studio Freight](https://www.studiofreight.com/) - [Francesco Michelini's portfolio](https://www.francescomichelini.com/projects) by [Francesco Michelini](https://www.francescomichelini.com/)
## Authors This set of hooks is curated and maintained by the darkroom.engineering team: - Clément Roche ([@clementroche\_](https://twitter.com/clementroche_)) – [darkroom.engineering](https://darkroom.engineering) - Guido Fier ([@uido15](https://twitter.com/uido15)) – [darkroom.engineering](https://darkroom.engineering) - Leandro Soengas ([@lsoengas](https://twitter.com/lsoengas)) - [darkroom.engineering](https://darkroom.engineering) - Franco Arza ([@arzafran](https://twitter.com/arzafran)) - [darkroom.engineering](https://darkroom.engineering)
## License [The MIT License.](https://opensource.org/licenses/MIT)