Infinite Scrolling With React - Tutorial

[@jefffideler8046]

Gotta say...this is probably the best, most straightforward tutorial I've ever seen!

[@Mike37373]

why is openlibrary.org/search.json empty?

[@jefffideler8046]

@@Mike37373 perhaps it needs params i.e. axios({ method: 'GET', url: url, params: { q: query, page: pageNumber }, cancelToken: new axios.CancelToken(c => cancel = c) }).then

[@serhendiefendi]

i agree

[@xanderav]

Hey!, just a simple tip that i use, is when you want to know if an array have elements (means its length is greather than 0), you only have to put array.length instead of array.length > 0, because if array.length is 0, 0 means false, and if is not 0 so is true, sorry if my english is bad.

[@irasanchez1265]

No need to apologize for your English. it was understandable.

[@nishantmogha7679]

Or you can just use the array, [] is falsy.

[@limitless9483]

@@nishantmogha7679 array [] and {} are truthy brah

[@limitless9483]

Also to make sure the app won't crash when array is null use optional chaining like myArr?.length

[@xxxyy7452]

You can do that, but sometimes clearly code better than clever code

[@shivaskanthan6144]

4 years later and this still works like a gem, Kudos to you!

[@johnbox5540]

awesome video. infinite scrolling starts at 17:50

[@toaninh2668]

when i click this video, i only expect to know how to implement infinity scroll. But after 25 minutes i have learned way more than that, like custom hook. Thank you so much

[@whereismyjuliet]

Amazing tutorial, as special the approach to trigger the axios function via IntersectionObserver instead of div.scrollHeight.

[@sahaneakanayaka3394]

That useCallback() behavior with useRef() that confused me, now I got it. Thank you Kyle, this is the best explanation about infinite scrolling with react 😍😍

[@magicfibre]

I think this deserves a clarification - it's not just useCallback that can be assigned to an element's ref. Any function can be passed there, you just need to be very careful if the function updates state, since it can cause infinite re-renders. Therefore, in this scenario, Kyle is right to use the useCallback hook, as the function he's using calls setPageNumber. Let's say he used a plain function: the function he's using sets the state at some point, which re-renders the component. When the component gets re-rendered, the function gets reinstantiated. Since it's passed to an element's ref, the element gets re-rendered, which calls the function again. The function changes the state, causing the component to re-render... and we have ourselves an infinite loop.

[@CaratBoo1D]

Wonderful explanation!!

[@JeanGray218]

this literally just happened in class a few minutes ago in this example our TA was showing us...thank you now I understand why

[@manavdixit3355]

Why can't we just create an reference using useRef and pass it to the component. Then Handel the intersection observer without a function.

[@kavyar8579]

Great explanation

[@CesarZaitoun]

Thanks for explaining that, this is the only section in the video that I needed more explanation on

[@rajapavithraselvaraj5937]

I really have to say.. this was the best, clear, very staright forward tutorial. AWESOME

[@fluntimes]

Great to see a video that includes some of the more advanced React features. I'll definitely need to watch this again, which is a feature of the best code run through videos.

[@aryavats5403]

Man I have watched literally thousands of paid courses, but no course matches the level of explanation that this guy provides. Simply Amazing. Hats off!

[@akarshsrivastava8890]

Kyle, you are great. Never found a tutor explaining such complex topics so easily. 😊

[@acedecastro83]

Learned a lot from this. Thank you so much Kyle 🙏🏼

[@WebDevSimplified]

You're welcome!

[@Doom_C]

Awesome tutorial man. Straight to the point and well explained. Got an infinite scroll up and working in my application no problem after watching this. Subscribed!

[@uszeyboi]

Thank you so much! I was struggling with window object so long and finally your video helped me!

[@frontendHacks]

kzbin.info/www/bejne/mWHRfJ2Do6mZfZY&ab_channel=Front-EndHacks Watch Infinite Scroll Video here in Hindi

[@rizqyhbb]

just from this video I have learned so many things, mainly the useRef and useCallback. thankyou

[@봄여율-u9f]

This react lecture is AMAZING... Thanks from Korea.

[@supreechajaijumpa4656]

I'm tried to use infinite scrolling library but it not looking good. Your video had save my life it working great and smooth, Thanks

[@eternl_sunshine22]

thanks!! used your pagination api with this, tweaked it a little as i'm using sequelize and it works great.

[@Rodo1802]

This is a great tutorial, straight to the point and clear. Thank you, Kyle!

[@LinkSake]

Amazing! Thank you very much, I thought it would be harder to make something like this. Also THANKS because I finally got how to make a custom hook, I was having some struggles to get it.

[@sendashish]

There is one serious situation custom hooks can land into is when the arguments change, the useEffect inside hook is not called synchoronously, in fact it is called asynchronously whenever React wants, therefore, the very first render after the change of the arguments, hook will still return the stale data (in this case the books because of useState). I land into this issue when I was creating my useLocalStorage which takes a key. And when I change the key it still returns data for the old key. This scenario is well taken care by useSWR hook, the moment the API URL changes the data returned is different. Can you make a video regarding these advanced patterns in REACT sometime?. That would be wonderful!

[@sergiodfm]

I. You are awesome. This video is amazing. You just went straight to the point and your language was very clear. Thanks for sharing this content.

[@nalladileepreddy1436]

Never saw any better explaination than this, thank you ..

[@isaacpriestley]

Your tutorials are incredible! It's so much great information in such a concise presentation.

[@brunamarques580]

Thank you so much for this tutorial, it literally helped me pass in a interview test 👏

[@usamatahir6413]

Thanks for the tutorial. This is probably the best, most straightforward tutorial

[@mohammadaldibes6879]

The best tutorial I've ever seen

[@koladeleolaitan]

Just used this at work. Thank you Kyle!

[@MaxAigner]

I am really impressed by this tutorial, it helped me a lot in my current react project, thank you!

[@romihasan380]

you've a better solution than using scroll position broo, good job!!

[@RizaHariati]

The intersectionObserver is awesome!! so much more practical!

[@jrs_devs]

Using the ref on the children will force them to re-render when they're not the last item in the array, so maybe is better to use a the ref on a footer or something to observe the IntersectionObserver. And use useEffect to have the same functionality.

[@brindch8372]

Just a side note, you can also use Debounce Component to have delay when the user stops typing. Anyway, Great job! thanks for this!

[@WebDevSimplified]

Very true. For this small use case it isn't really a big deal, but in a larger application this could save a lot of performance. Thanks for the tip.

[@ManishKarki]

@@WebDevSimplified can you point me to some resource for this"debounce"? Thanks

[@brindch8372]

@@ManishKarki you can search for react-debounce-input

[@WebDevSimplified]

@@ManishKarki Just do a Google search for React debounce. Essentially all it is, is delaying the axios request.

[@ismoilshokirov]

Really good approach, dude your video helped me a lot to finish my project at work, Thank you so much

[@NikhilAdiga]

Thank you so much! None of the other solutions worked for me except this!

[@parasarora5869]

its totally amazing. i dont know about intersection observer so was a bit confused there but the video was mind blowing. Thanks for explaining the idea behind the infinite scroll

[@WebDevSimplified]

Intersection Observer is a bit complex, but it makes doing things like infinite scrolling so much easier.

[@parasarora5869]

@@WebDevSimplified yes.. absolutely correct

[@aronhegedus]

Thank you for this tutorial! I got something similar workign, I just wanted the "isVisible" for one of my elements to show up. I think this video is a little too long, and getting the custom hook created is a little bit of a side job for getting infinite scrolling, and I would have preferred just getting the "isVisible" working, and then going from there. That being said, thanks for the info, your tutorials are always at a good pace, and I like that you've included the source code!

[@АлинаКуракина-в9у]

Thank you for making such an understandable and useful lessons! You're really great🙏💛

[@baileysli6235]

5:24 - use https if you have problems

[@viratkohli-jr6md]

Cool . Got my all doubt cleared. Nice work

[@jairocket]

This tutorial is amazing! Thank you very much for making it simpler!

[@Nil-js4bf]

Didn't realize so little code was required for this. I'm too used to using libraries and I'm not aware of what Web APIs there are. Going to put an effort to learning more of these things and getting comfortable with web APIs like Intersection observers and setting it all up with refs and callbacks

[@kingsleyakindele5389]

A very great tutorial man.

[@bahtiyarahmidi2938]

Very good tutorial, but what if we don't use axios, instead we are using vanilla xmlhttprequest, how do we do throttling effect in this circumstances ?

[@razzsawhoney2818]

Thanks man. A much needed tutorial for me...

[@anshshrivastava9107]

Thanks for this man, exactly what I was looking for, now I can create what I wanted. THANKSSSSSSSSSSSSSS

[@itsatimemachine]

your videos are awesome-- thank you! also, happy new year

[@faris.abuali]

Great explanation! Thanks Kyle!

[@ankitmehrotra8519]

Thanks a lot Kyle. All of your videos are top notch..

[@mayurborse1745]

Awesome. Just what I was looking for. I used it in photo grid and full screen view in my app. Thanks

[@DieterWiesflecker]

Very very straightforward, keep the good work and thanks!

[@jhmesseroux]

incredible bro i appreciate this🙌 kind of content

[@chexter-wang]

This is so easy to use and does help a lot! Thank you for the video!

[@amitpareek8905]

Amazing video. You have made a complex thing look so easy. Keep up the great work!! Thank you!

[@frontendHacks]

kzbin.info/www/bejne/mWHRfJ2Do6mZfZY&ab_channel=Front-EndHacks Watch Infinite Scroll Video here in Hindi

[@djmilen4o]

Nice and clean tutorial! Very good explained!

[@AbhishekBijalwanGaz]

1000 likes from my side, Brother.

[@invictuz4803]

Awesome tutorial mate! I suggest including "Custom React Hooks" in your title. I was actually pleasantly surprised that this tutorial was going to include custom hooks. If I had saw that in the title, I would have clicked on it way earlier since React Hooks is the hot thing that everyone should be learning now. Furthermore, now that I've saved this to my React playlist, I still won't know that it includes custom hooks when I scan through all the video titles.

[@mcy93w]

24k pure gold. Thank you so much!

[@shivrajnag12]

How to deal with the scenerio when each item has a delete button along side it and the user can delete item while scrolling, then data will change at the backend(The data will shift to previous page and I will not get the correct no of data for scrolled page ) I hope you understood what I mean to say

[@waynes9744]

I learned a lot from this video. Thank you, Kyle.

[@WebDevSimplified]

You are very welcome

[@kumardeepak260]

Hi, first of all, owsm breakdown of the code... loved it, understood it. 1 QUERY, after loading 1 or 2 more page if the error occur, then along with Error... , Loading... is also present. Can you tell how to remove the loader if the error occurs?

[@Mike37373]

why is openlibrary.org/search.json empty?

[@mellocamilo]

Awesome tutorial!! thanks for this high quality work!

[@Andy801_dawless_music]

so much useful info in 25 mins 😄 thanks!

[@ashokumarkuppuram6685]

Thanks very much! I developed my app with infinite scrolling. One issue I am facing is that there are multiple setState operations say setHasMore, setLoading along with setData which is causing multiple render operation.If our table is heavy, it looks little burden to the table. Please advice. Thanks.

[@yassinerassy6840]

Use usereducer hook instead or one object in which You puts all the data you have with usestate

[@lexternal]

thanks, great tutorial. prob one of the best i ever watch

[@rva3674]

The best tutorial in youtube!!!

[@marcusmaiialima]

Thank man!! It was very simple to implement and add to the project.

[@ashishkumawat6110]

Very clever implementation!

[@mohammadusman9701]

Hi, I have a doubt - what if when our page loads for the first time, we want to show the list of books with infinite scroll , and later when the query occurs we can filter the books . Any idea how can we achieve that

[@KarahannAe]

Thank you for this amazing video! My project was a little different but I managed to make it work in a short amount of time.

[@frontendHacks]

kzbin.info/www/bejne/mWHRfJ2Do6mZfZY&ab_channel=Front-EndHacks Watch Infinite Scroll Video here in Hindi

[@TiberiusGracchi]

Very good information, especially the part about using useCallback instead of ref. I was just wondering how to grab the last node.

[@kat802]

thanks dude, u save my job. button like for u

[@md.akib5124]

wow you just taught us to make a node_module. Thank you so much

[@alext8593]

Hi, nice video! Could someone kindly explain to me why Kyle decided to use the "useCallback()" hook? Is it because recreating the callback that initiates the Intersection Observer instance etc. is expensive/intense and thus it makes sense not to recreate it every time? Thanks x

[@soultouchingsongs]

Thanks a lot for the video🙏. Finally understood infinite scrolling.👍

[@HostDotPromo]

A react native tutorial on this would also be awesome. Currently building an app with native.

[@WebDevSimplified]

I don't like mobile development so there probably won't be much if any React Native on my channel.

[@irvanhardyanto7038]

Nice video, worked like a charm

[@sonesay]

Hi, I have one question. How do I cause the api call or fire without the onchange handler? Like I want it load my data on initial load and then any subsequent search types would continue to work as normal?

[@meetshah4432]

Actual stuff starts from 17:50 guys. You can skip to that.

[@chronotriggered204]

Wow, infinite scrolling was simplified many thanks, your explanations help me grok

[@akshayjadhav2418]

Really good content kyle, please make video on lazy loading and interceptor in react (:

[@SanjayYadav-ur4qj]

Great! I want to highlight that you keep adding new items to DOM, which will make DOM heavy. In this approach, We might have a large number of elements. How can we solve this issue? Is there any approach where we can maintain a specific set of items? No matter how long the list is.

[@bipinnamburu9820]

Hey,why do we need to store previous books initially while just fetching all the books according to the string?

[@gautamv2046]

Really appreciate your work, simplest of all

[@frontendHacks]

kzbin.info/www/bejne/mWHRfJ2Do6mZfZY&ab_channel=Front-EndHacks Watch Infinite Scroll Video here in Hindi

[@dijkstra5952]

Nice tutorial. Although it's more correct semantically to use useEffect for attaching and disconnecting an observer on the last visible node rather than using useCallback like you did. Thanks for your videos!

[@quoccuong1733]

Is there a difference though. Ive doing it the useEffect way but wonder if 2 methods differ in any way

[@yassinerassy6840]

Can you provide more details why ?

[@rideforworld]

congrats for your engagement!

[@riankrishandi]

nice tutorial , clear explanation , thanks bro

[@BhushanDhage]

Awesome explanation 👌🤩

[@brinascode980]

Hey Kyle, what advantage did useCallback have here over a regular function, since it's using a dependency array anyway? Thanks for the video!

[@kestutisgimbutas5314]

My page gets re-rendered every single time I change state and after re-rendering I am placed in the top of the page. What am I doing wrong?

[@akash.serene]

My first guess is you are not appending the state values in the prev state. Probably you are overwriting your state in every call

[@yorkwebsolution8986]

Very simple explanation. thanks alot

[@AjithAbinashSS]

Great Tutorial... Helped a lot

[@niyongaboeric]

Hi Kyle, thank you for sharing the video. 17: 05 to 17: 46 min saved me. I never used two userEffect before, one to clean the state another to fetch data until I watched your video. I am implementing Cursor relay pagination. I had an issue about clearing old data. Whenever react-route changes I could get old data and new data repeatedly. I 've fixed the issue after 2 days struggling with your help. God bless you brother.

[@Mike37373]

why is openlibrary.org/search.json empty?

[@dipankarmaikap]

When implementing this it keeps auto firing once reached to the bottom of the page but in your example its keeping the scroll position same and appending the data bellow. Any idea why this is happening.? Note* If i manually scroll up it stops working and again starts auto firing when scroll to the button.

[@sebastianalvarez3053]

set "overflow-anchor: none; " in css. Look at the example of the chat in this link css-tricks.com/almanac/properties/o/overflow-anchor/

[@shahzaibriaz6552]

Please explain a little bit about intersectionObserver api and how did you identity that you've to use "useRef" hook with Intersection Observer API

[@navead30]

Nice tutorial. This works smoothly for text based results. But it will struggle to render list of complex React components when list becomes huge. Can we also have a React window tutorial

[@bobkazamakis5169]

what do you mean by that?

[@engineerscodes]

how to prevent multiple axios requests on infinite scroll ?

[@hakanaki]

Love Your Videos bro 👏👏

[@jivanmainali1742]

When we have millions of element do we really do map to show individual list items