Created
April 20, 2022 17:20
-
-
Save deepakgudi-pixel/9dadbd4d2580c16c0c8585b3bcdf1e40 to your computer and use it in GitHub Desktop.
smooth scrolling effect for websites
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| const mainTag = document.querySelector("main") | |
| const bodyTag = document.querySelector("body") | |
| const cursorTag = document.querySelector("div.cursor") | |
| const cursorInnerTag = document.querySelector("div.cursor-inner") | |
| const captions = document.querySelectorAll("figcaption") | |
| const motion = window.matchMedia('(prefers-reduced-motion: no-preference)') | |
| const large = window.matchMedia('(min-width: 600px)') | |
| const observer = new IntersectionObserver(entries => { | |
| entries.forEach(entry => { | |
| if (entry.intersectionRatio > 0.5) { | |
| entry.target.classList.add("in-view") | |
| } | |
| }) | |
| }, { | |
| threshold: [0, 0.1, 0.5, 1] | |
| }) | |
| if (motion.matches && large.matches) { | |
| // styling with JS so we can scroll with JS turned off | |
| mainTag.style.position = "fixed" | |
| mainTag.style.top = 0 | |
| mainTag.style.left = 0 | |
| mainTag.style.width = "100%" | |
| // where are we, vs where we wanna be | |
| let currentScroll = 0 | |
| let aimScroll = 0 | |
| let currentCursorX = 0 | |
| let currentCursorInnerX = 0 | |
| let aimCursorX = 0 | |
| let currentCursorY = 0 | |
| let currentCursorInnerY = 0 | |
| let aimCursorY = 0 | |
| captions.forEach(caption => { | |
| observer.observe(caption) | |
| }) | |
| // make a bit of code that'll run every frame | |
| const changeScroll = function () { | |
| // we need to make the whole page the same height as this too so we can scroll down to the same distance | |
| bodyTag.style.height = mainTag.offsetHeight + "px" | |
| // is there any diff between aim and current? | |
| // if so, tween towards the aim | |
| // 0.05 is how quickly/slowly to aim | |
| currentScroll += (aimScroll - currentScroll) * 0.1 | |
| // then move the whole 'page', actually, the main tag, for this current scroll position | |
| // minus we we're moving the main Tag up as we scroll down | |
| // mainTag.style.top = (-1 * currentScroll) + "px" | |
| mainTag.style.transform = `translate(0, ${-1 * currentScroll}px)` | |
| document.querySelectorAll("figcaption").forEach(caption => { | |
| const box = caption.getBoundingClientRect() | |
| const midY = box.y + box.height / 2 | |
| const midScreen = window.innerHeight / 2 | |
| const diff = midY - midScreen | |
| const images = caption.querySelectorAll("img") | |
| images.forEach((image, index) => { | |
| const speed = 0.05 * index | |
| image.style.transform = `translate(0, ${diff * speed}px)` | |
| }) | |
| }) | |
| // run this every 'frame' | |
| requestAnimationFrame(changeScroll) | |
| } | |
| const changeCursor = function () { | |
| currentCursorX += (aimCursorX - currentCursorX) * 0.1 | |
| currentCursorY += (aimCursorY - currentCursorY) * 0.1 | |
| currentCursorInnerX += (aimCursorX - currentCursorInnerX) * 0.15 | |
| currentCursorInnerY += (aimCursorY - currentCursorInnerY) * 0.15 | |
| cursorTag.style.left = currentCursorX + "px" | |
| cursorTag.style.top = currentCursorY + "px" | |
| cursorInnerTag.style.left = currentCursorInnerX + "px" | |
| cursorInnerTag.style.top = currentCursorInnerY + "px" | |
| requestAnimationFrame(changeCursor) | |
| } | |
| // when we scroll, update the aim | |
| window.addEventListener("scroll", function () { | |
| aimScroll = window.pageYOffset | |
| }) | |
| document.addEventListener("mousemove", function (event) { | |
| aimCursorX = event.pageX | |
| aimCursorY = event.pageY | |
| }) | |
| const links = document.querySelectorAll("a") | |
| links.forEach(link => { | |
| link.addEventListener("mouseenter", function () { | |
| bodyTag.classList.add("hovering") | |
| }) | |
| link.addEventListener("mouseleave", function () { | |
| bodyTag.classList.remove("hovering") | |
| }) | |
| }) | |
| changeScroll() | |
| changeCursor() | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment