Subtle, yet Beautiful Scroll Animations

Learn how to implement scroll animations with HTML, CSS, and JavaScript. Use the JS IntersectionObserver and CSS transitions to implement a native "animate on scroll" effect that works in any browser.

[@ruriko1237]

I see Jeff teaching us how to center a div -> I download the video. This might be the best tutorial of all time.

[@alfredogonzalez9420]

what can I say, I'm a SIMPle man.

[@totoshampoin]

I mean, he did that already kzbin.infonjdJeu95p6s

[@MicLieg]

kzbin.info/www/bejne/pJvHe5irbpqjbNU Thank me later

[@reesericdotci]

CSS tricks complete guide to centering is amazong

[@gauravrajghimire6396]

Teaching developers how to center divs... Should be the default background video on stack overflow...

[@figmentfire]

It's sooo nice to see some vanilla HTML, CSS and JavaScript in use!

[@jaimevelasco7957]

yes, i was just going to write that

[@brandonfox9618]

Plain vanilla is my favorite ice cream flavor!

[@kingfatpig3512]

what is vanilla ?

[@figmentfire]

@@kingfatpig3512 plain, no frameworks, no libraries, just plain "vanilla" flavour code.

[@kingfatpig3512]

@@figmentfire ok thanks

[@devqubs]

every coding tutorial should be like this, clear, concise and no BS.

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@user-cl9qv7hj9x]

and no Brawl Starts. Absolutely agree

[@psychomonk2443]

If you want tutorials without bs, pay the creators that do so

[@kingfatpig3512]

What does BS stands for?

[@user-cl9qv7hj9x]

@@kingfatpig3512 bullsh!t

[@donniedamato]

Two things: You can add the following one-liner to toggle a class when the entry is intersecting. entry.target.classList.toggle('show', entry.isIntersecting); Instead of turning off the animation with prefers-reduced-motion, turn it on. @media (prefers-reduced-motion: no-preference) { .hidden { transition: all 1s; } }

[@pepkin88]

Disabling for prefers-reduces-motion is easier to do. Firstly, all the code describing the animation details is with the rest of the styling. Secondly, it's easy to remove all transition on the page with a single selector: *, *::before, *::after { transition: none !important; }

[@beyondfireship]

Great improvements

[@invinciblemode]

@@pepkin88 nah, it goes with the mobile-first principles or in this case animation-less-first principle, where you assume everyone does not want animation unless stated otherwise. It’s a better way to handle prefers-reduced-motion

[@DavidMulderOne]

@@pepkin88 General reminder: Reduced motion is *not* no motion! Browsers could trivially turn off *all* motion in that way. The point of prefers reduced motion is to tone down or replace motions that would be problematic for users with certain disorders.

[@cool_scatter]

@@invinciblemode “unless stated otherwise” - but here you’re selecting based on “no preference”. It’s identical to disabling on prefers-reduced-motion in both form and function.

[@Zhundah]

There is an alternative way to do the staggering part if you don´t want to write a :nth-child() for every item. One could define an inline CSS variable in the html like style="--order: 1;" (2, 3, 4 and so on for every html element). Then in the CSS set a transition-delay of 'calc(100ms * var(--order))'. This works because the inline variable will be cascaded into the .logo class. This simplifies the staggering part in the CSS, but note that your target browser must support CSS variables.

[@qubi]

i was about to say that :D

[@WACdeG]

Or you could use counters, which has less boilerplate.

[@fancybaguette]

a very cool and smart solution

[@ko-Daegu]

@@WACdeG best solution for this case

[@94726]

@@WACdeG counter probably doesn't work in this case, as it returns a string value and therefore can't be used inside the transition-delay

[@gergoradeczki]

I just noticed "defer" would sometime disappear around 1:44 Now I can't unsee it.

[@chrismdev_]

I love how you talk about the reasons behind your decisions. Most tutorials leave out the why, making it way more difficult to understand.

[@user-be3ri8gf1p]

Your videos would never stop making me impressed. Such a knowledge portion in just hundreds of seconds...

[@okoye.charles]

This is exactly what I have been looking for. I think this channel is living up to it's expectations. ☺️

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@aredeker]

Love these short but really helpful tutorials! For the 'npx serve' command it already was worth watching

[@filiplaskowski410]

Bro you are a fucking hero for making 5 min videos on these topics instead of making them 20 min with unnecessary filler. Thank you!!

[@michaelflevier7645]

I love this, simple, clear and straightforward. This channel should be certified! well done!

[@devincheca9605]

Yeah the intersection observer is a lifesaver for this sort of thing. Good stuff. Love the tutorial.

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@katymapsa]

More of this please! Insanely good videos, thanks a lot for these.

[@MrSama1000]

Jeff, I just want to say thank you! Animations were the breaking point for me and you just made it soo easy. Top! 💯

[@Yuri-qr7ml]

Thanks for this tutorial, found a way so I could put it into my own project, working on a website for my very first time and all tutorials and how things work have been incredibly insightful!

[@Showmatic]

I just learned about intersection observer a few months ago and man, I love it. It's been so useful ever since.

[@vaisakhkm783]

i just learned html a few years ago ;) jk

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@anton9410]

Pretty cool tutorial, simple and goes straight to the point!

[@rounaksen1683]

didn't expect the animation code to be small like this. I is wonderful what you can achieve using vanilla Javascript .

[@jasonfloyd5225]

Congratulations! This is the very first YT video I’ve ever set the playback speed to *less* than normal. Good stuff.

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@Tri-Technology]

Well done. A tutorial I would have needed one month ago, Now I figured it out the hard way

[@omarjimenezromero3463]

at least now you have a video to remember how to not go through all your memory and come here to do that XD

[@micaelvieira6724]

if you can afford to use external libraries for this, framer-motion makes it really easy to have beautiful scroll animations

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@yashhhh8012]

observer is one of hardest topics but your way of explaining makes it easy to Understand. 🙌

[@masoomsanadi]

One of the very few videos. Simple to the point.

[@NikSpringer]

I’m still learning my way around CSS, HTML, and JS, which contributes to my lack of knowledge, however, I feel that if Fireship were to include the source code for videos like these, it would significantly help new learners like me.

[@matthewrussell1027]

Fireship isn't really for new learners...unless they hear fast.

[@vaibhavagrawal939]

@@matthewrussell1027 playback speed 0.75 is good for this channel

[@dripcaraybbx]

Finally something that isn't "Step 1, go download a library"

[@seanvinci]

Subscribed! Fantastic tutorial. Super useful, to the point, with a hint of comedy. Looking forward to seeing more on this channel!

[@koko5498]

Boy I keep being amazed how such things, which look hard at first look, are being resolved with less than 50 lines of code.

[@jackjackdev]

If anyone is having trouble getting it to work in react (like i did for a sec) just wrap your JS in a useEffect hook :)

[@thesunofodin]

Thank you!! ❤

[@Skanderrrr]

I did nothing happens

[@phatakom]

Luckily I still have copilot cuz of Student pack.

[@natyacodes]

Same :D

[@hunterbertoson156]

Same.

[@islamibrahim8121]

Really?????

[@_sevelin]

But are you a student 🤔

[@null_spacex]

Same, seems like it will work forever 🤫🤞

[@elhaambasheerch7058]

Jeff is the only coding guy who makes learning stuff fun, hats off

[@vaibhavagrawal939]

Thank you for this amazing video, I have wasted my whole day for this scroll animation on internet but couldn't find any good thing. This video randomly popup in my youtube homepage and it made my work easier.

[@GyroCannon]

I've done something similar to this but with interpolating a scroll position with an onscroll event and a position: sticky. The downside to the approach is that there's more JS, but the upside is that you can leave animations half finished if the user stops scrolling There's a Medium article about it (specifically, how to replicate the effect like it is on Apple's product pages) out there that shows exactly how it works.

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@gabriellengrvc]

do you have the link to the medium article please?

[@NateLevin]

To reduce code duplication for the animation staggering you can use CSS counters combined with calc(), right?

[@CheosFaction]

I would love to see more cool tutorials like this.

[@billyrestelle2740]

I've been looking for this for ages, thanks for sharing!

[@nomadshiba]

instead of *transition: all .5s* you can use *transition: .5s;* *transition-property: transform, filter;* and you can use a custom property instead of *.5s*

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@Fjonan]

One nitpick, you should avoid the 'all' for the transition. This will bite you in the behind in more complex stylesheets can lead to transitions for properties you don't want transitioned. And those transitions can be extremely bad on the render performance (like margins, dimensions and positions that don't use transform). I made it a habit to always explicitly define the transitioned properties in the transform rule.

[@Anselwithmac]

Ahh see Im new to JS, but not to programming. I was wondering this as well as I was making a lot of transitions. What do you prefer to do instead? Today I made a navigation bar that fills the whole top of the page, and as the user scrolls down, the nav bar "pops" out and shrinks to be more of a floating element. But I also noticed when the page first loads, the nav bar shifts into place due to the transition all.

[@Fjonan]

@@Anselwithmac most of the time you can do what you need with good performing properties like transform which offers rotation, positioning and scaling. Only if this does not cover what you need you should start to transition other stuff. For example if the navbar "pops out" you could fade the content out (really fast like 0.15s) and then shrink it using transform: scale. It sure requires extra work to avoid transition: all but gives you that extra bit of resilience.

[@petflaska389]

Exactly what I needed and nothing more perfect!

[@paulaneesh7]

I actually have used this in my portfolio site but with scroll behaviour smooth upon when the element is about to appear but the one you showed here is better, I will try to use this one from now

[@duke605]

I'm a Senior Web Developer... Idk why I'm watching this... I found it entertaining none-the-less

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@poolkrooni]

Another small improvement besides the reduced motion preference would be to account for no-JS users and have some ".no-js" class on the body that reveals all the hidden elements. Otherwise atm everything would remain hidden.

[@wayneswildworld]

What percent of people don't have JS these days?

[@poolkrooni]

@@wayneswildworld You're thinking of the most average user, but also think about parsers visiting the site and only grabbing the visual elements, some kiosk-mode machines with limitations or library computers or whatnot. This is a simple best practise that will allow you to universally reach a wider audience. Also some of my friends have JS off by default and only allow it for a limited number of trusted sites, those people also exist and that's okay 🤷‍♀

[@wayneswildworld]

@@poolkrooni So what should you do in an instance where you are hiding an element with js? I am not familiar with this issue?

[@poolkrooni]

@@wayneswildworld I most likely would keep it visible. Depends on the specific scenario, you can sometimes just move toggling over to CSS or not have interaction on the non-js version

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@orlius]

Still the best way to understand new stuff and clearly learn in few minute, you are splendid !!

[@ivan_off]

Found out about intersection observer 2 years ago and I was very happy that I didn't actually have to use any kind of library for this simple task in every project, especially since learning something like Greensock isn't particularly easy. Thank you for this tutorial!

[@shreyanshpatil8303]

i made same in react and chakra ui and applied the same js the .show part it not working

[@cementeriocluub]

@@shreyanshpatil8303 haha the same error, when I press the reload page, everything disappears

[@invertcode]

It's also nice to use inline css variables, fe. style="--delay:300ms", that way we don't need to worry about writing separate css for each element. Obviously classes (fe. .delay200) would work the same

[@mityaboy4639]

especially if the number of elements are dynamically generated- so you either run out of classes ready or you need to generate them (with the nth option) the inline variable is the best option as it can be generated on the fly and a simple css line can take care of the delays based on the variable :)

[@dl0.0lb]

Great and succinct. It would be nice if you could combine the `n` in nth-child and calc() to do something like `.logo:nth-child(n) { transition-delay: calc(200ms * n); }` . Maybe someday.

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@nicolasbava3467]

BOMBASTIC!!! thank you very much, working properly in next js framework

[@ewnt]

Thank you for this awesome simple animation video. I'm currently creating my portfolio website from scratch and this will come handy !

[@BlueJDev]

Thought it might be worth noting that you shouldn't hide elements by default in the real world. Might be a good idea to use a custom attribute for the observer then hide each element, add the hidden class, on load with the JavaScript, as we're already using it. This way you won't exclude those that have JS disabled by default (a small number I know, but some crawlers struggle with JS) Of course there's many other ways to do this as well, like noscript.

[@PenguinCrayon269]

i conditionally disable js on bloated website 👍

[@matheusgoulart1618]

I don't think for the crawlers it makes much of a difference if it's hidden or not since they tend to not take a lot of css into consideration. For users, if they have JS disabled, you can just have a noscript tag saying you need JS, like in a blank React app.

[@BlueJDev]

@@darkpain4208 hey, you wouldn't be able to have animations applied on scroll without JS, so if someone has JS disabled on their browser and they visit your site, using the code in the video, the user would never see any content that has the "hidden" class set by default as JS would not run and remove the hidden class on scroll. If every item is animated your page would essentially be blank. So I would use an attribute like bluej-scroll-anim="true (or name of animation class)" on any element needing animate on scroll in, then target that attr in JavaScript, finding all ("[bluej-scroll-anim]") and setting class hidden (if not in view) on load in JS, before activating the "scroll" observer on the set of elements.

[@BlueJDev]

@@matheusgoulart1618 true, a lot of sites are JS based nowadays so it is quite a small consideration. Would just be shame to have some users not see important elements on the page just because I added animation to it. Yeh, I suppose if a crawler considers CSS these days it's likely to take into account js too..

[@darkpain4208]

@@BlueJDev Thanks so much!

[@crowlsyong]

You are so good at making these videos. Thank you. Do you have github project for this? If so, can you link it?

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@TheTutosurtout]

Big up man, i loved the video. Concise, precise and elegant.

[@sam-u-el]

now that was simple, direct, and awesome.

[@Peter-yd2ok]

Is there an easy way to implement smooth scroll or locomotive scroll?

[@peterszarvas94]

html { scroll-behavior: smooth; }

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@i_Mordercag1]

It's really sad to read his "hi mom" and secret messages for his mom after the sad day:(

[@Migsfigs]

Great video, concise and short yet descriptive

[@igormonteiro7039]

WOW!!! this was way more simple than expected! just added to my site! thank you a lot man!

[@phatakom]

1:12 poor IE 🙃

[@alfredogonzalez9420]

Poor? Screw IE, it can be called A explorer not a modern explorer, with their shitty support and now it's dead and buried, gg.

[@phatakom]

@@alfredogonzalez9420 lol

[@codernerd7076]

It's dead

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@bestfacebookcover9348]

For staggering this can be useful as well if you need more control over the delays: .d1{transition-delay:100ms} .d2{transition-delay:200ms} .d3{transition-delay:300ms} .d4{transition-delay:400ms} .d5{transition-delay:500ms} .d6{transition-delay:600ms} .d7{transition-delay:700ms} .d8{transition-delay:800ms} .d9{transition-delay:900ms}

[@Davidlavieri]

and with sass even better

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@adrielmwofoh9111]

Hey jeff, cool video, Straight and concise. Thanks man.

[@JBurky15]

Easy scroll anims AND centering a div! Well, color me impressed. I'll definitely be trying this out on my next project

[@zadeviggers]

The issue with this is that it doesn't work when JavaScript isn't available. A progressive enhancement approach like this would be better: Have all the elements shown by default. When the JavaScript runs, the intersection observer can add a class to hide all of the non-visible elements, without affecting the already visible content. While this does mean that you lose the ability to have animations on any content over the fold (there would be a slight flicker, which isn't acceptable), I think the benefit of the content being accessible to a larger audience is worth it.

[@mszoezo6368]

Wouldn't it be better to have css inside a tag to force show everything?

[@zadeviggers]

@@mszoezo6368 that seems like it would be more complicated than using an extra class. If it's using multiple classes you don't like, a custom attribute would work well - I was originally going to suggest that in my comment but I decided to use classes for the sake of simplicity

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@eotikurac]

omg the js not available people are still among us

[@DKSubconscious]

For none JS then the hidden class shouldn’t work with zero animations. Most people have JS on and we found most people using screen readers have JS turned on too.

[@ariansharifi9682]

Perfect, i was just wondering how to do this for my react website

[@AidanLyon]

Me too. Can anyone advise?

[@aelxxs]

@@AidanLyon framer motion works great for react

[@kelvink96]

I have been looking for this for months now. Thanks for sharing 👍👍👍

[@toulasantha]

Awesome job mate. Love the flawless delivery. 👍

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@pixiedev]

What if js is disabled 🤔. Same as you teach I done yesterday. but I didn't add hidden class by myself. I add .reveal-anim select all the .reveal-anim when it will not intersecting it will add hidden class to the element and if intersecting it will remove. and if js is disabled all elements where visible in my case.

[@pokefreak2112]

Good catch, another solution would be to use the Web Animations API so you don't have to worry about CSS breaking the noscript case

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@4.0.4]

I'll just say something. Going too far with customizing basic stuff like scrolling behavior is sometimes overdone, and becomes gaudy and invasive, like custom cursors or scrollbars of the past.

[@lina_useche]

Such an amazing tutorial! Thank you so much!!

[@szymonszewcjr]

This kind of content is so good. Give us more

[@dandcodes]

Great video love the more in depth content. TL;DR: I know this is a demo site so this comment is only meant for larger projects. Put the script tag in the element with a defer attribute Regarding your placement of your script tag at the end of the body element, doing this may cause a document reflow due to the HTML/CSS already being parsed before the JS file is read; as the browser isn't aware if loaded JS is going to modify a DOM element. A more modern alternative is to place your script tag in the head of the docuemnt but you will need to add a "defer" tag to it as shown in this video to ensure it isn't render blocking as shown in this video kzbin.info/www/bejne/mYnan32Bm9Grl9U

[@cuuy]

How does defer prevent reflow exactly? Script with defer will still get executed only after the document has been parsed?

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@isheanesunigelmisi8400]

🎉 Animations so cool that you forget that GitHub is training copilot on stolen code

[@CUBKITS]

Fellas, is reading someone else's code stealing it?

[@majoralter]

How do you even steal code

[@Nanagos]

What else should Github Copilot train on? Only on closed source code made by Microsoft?

[@omarjimenezromero3463]

@@Nanagos hahahahahhaa i would like to watch how copilot crash like the blue screen of death every time i want to center a div XD.

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@tanviralamsyed9172]

this really elevated my website, thank you for the easy tutorial

[@KingPacavision]

Just started my portfolio website and this is exactly what I was looking for thank you 🙏

[@systemghost10]

amazing video I had always wondered how they got that effect! Thank you

[@carloscorgozinho5353]

Great video, fast and clean explanation. Just the way I like it. Thanks ;)

[@keeslinp]

I thought you were going to hijack scrolling and I felt a lot of premature frustration. Kudos for actually using CSS!

[@remoreacts91]

I was literally looking for how to do this! Amazing timing

[@andrew-does-marketing]

Such a great guide. You are a good content creator. Keep it up!

[@carolinaangelicasandovalag818]

Amazing work on the explanation, trying it definitely

[@dofxo]

literally one of the best tuts I've ever seen lately ❤‍🔥

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@michaelsolomon6033]

This is great, thank you so much

[@alialsaady5]

Thank you for the clear explanation

[@Manu-gl6ny]

haha the fight club lines you used at the start, honestly its a master piece. For those wondering what lines: the things you own end up owning you. And: its only after you lose everthing that yourefree to do anything

[@alansaldivares]

It breaks my heart knowing that you were greeting your mom a year before she passed away. May she rest in peace bro 🕊

[@ArnoldVeeman]

Back in the days I was really good at programming HTML in combination with actionscript (flash) It was my routine way to go and make some kick ass websites. Then they pulled the plug for flash... I invested many years to master both, after that I couldn't find the energy not will to learn php and JavaScript (which I am familiar with a little) I am happy to see that there are still people out there that wants to keep exploring this stuff.

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@yemam4156]

Nice Video and straight to the point

[@1ekk]

Good job dude! Hope you gonna make more videos like this one. 👍🏿

[@rahul-oj1xv]

How the hell u are giving that much info in this much time with thaaaaaat much clarity 🤯🤯😱

[@AyudhKumarGupta]

awesome! such a simple explanation :)

[@Sakinukas]

Appreciate your tutorial! Makes scrolling way more intuitive.

[@charusharma7872]

animated Box With CSS kzbin.info/www/bejne/nXPQqWaIormbeqc

[@TheBoysMemes123]

Awesome you make my day thanks

[@aidanzipzap]

Beautiful, just beautiful, thank you :)

[@leog1676]

This is a great video, thank you! Concise and informative. My kind of content!

[@adityamarzuk5970]

Man this is gem

[@ahmadrezadorkhah9574]

bruh thanks a lot. I've been looking for this.

[@mikhalpalych]

Absolutely useful and so easy, thanks mr youtuber

[@SmartC2007]

Thanks a lot. Well done and easy to understand!

[@PhilosophyDaily]

Literally the best 5 minute tutorial I'VE EVER SEEN

[@Ukr_sunflower]

Thank you so much for your tutorial! It’s so helpful

[@kushlalve2081]

Thank you so much for this tutorial , it was so helpful my website looks much classy now

[@broadshare]

Simple & powerful, thanks

[@fluorite]

exactly what I needed