I watched this video entirely in my bed, and now I plan on practicing this for myself once I get out of bed. This was very interesting and helpful.

Thanks so much! I was about to give up leetcode because I didn’t understand the need for data structures beyond maps and arrays like trees, stacks, heaps as a frontend dev. But you just showed an elegant solution with recursion. Gives me good motivation to study more!

Nice, I like the way you handled the depth. This could also be done in CSS with a clever use of a sibling selector but I like the way you've done it here with js a little better.

I had to do a similar code challenge, but also I had to add an input next to every element in the tree after pressing the enter key the child should be added to the right tree level. I haven't received any feedback but looking at this video makes me feel like I did a good job! Thank you! :)

WDJ this is awesome! Please more of this kind of content, more challenges (intermediate to advanced)! The Essence!

Thanks for the great content, as always, Cody!

Thanks 🙏🙏... This is exactly what i was gonna work on and your way is so much simpler

tks dude, u help a lot with this code challenges series, i've never had think to use recursive code to render a component.

Nice video. This gives me a lot of confidence if this is intermediate / advanced. Im only about a year into my first dev job but I could pretty easily come up with a solution for this.

I love watching you code man. I interned at a place last year using React and I was really bad at that. Watching you is making me want to try again with front end.

This is so informative and real-world use cases like recursion, rendering, etc. Thanks alot for sharing.

Loving this series and get learn something new before going to bed. 👍🏽

11:26 A suggestion, the element might work perfectly as it has its own dropdown. You can nest the children inside without having to depend on a toggle state and semantic HTML is a plus. Anyway, thank u so much for showing us how to tackle an intermediate react challenge. 😀

These are the best! Please keep these coming!

5:58 I think it doesnt really need to keep track of depth, just use margin instead of padding, so it renders the indentation in relation to the parent element

Dude, love your videos. I always watch them before I go to bed to wake up first thing in the morning and practice on them 🤙

Appreciate this video! Just been given a project at work to design a section based hierarchy like this (ex. 1.0, 1.1, 1.1.2, …). Now just need to think about how to create subsections under the parent that line up with backend

You don't need depth prop, with ol > li and padding does works

Amazing explanation

Button was not needed I think, could do the trick

Awesome :D really enjoyed this!

for the styling of the button you can use something like -> button { all: unset; cursor: pointer; } then it will remove all the default stylings

more of these kind of videos please!

Never was a person to comment on a youtube video, like or share it. But these types of coding for intermediate react js interview qsn made me do all those things.

This was super helpful!

im a mid full stack dev and still great to see someone eleses thinking process. Grat content!

Hey cody nice video! Next time for future code challenges can you maybe just give a bigger in depth explanation of the problem, with more examples, I didnt understand the problem at first or what it should look like(maybe im stupid😀), Thanks!

very good exercice thanks a lot

This is some kind of content that is not available and really fun to watch

Awesome video

I don't even know where to start with kind of problem. Thanks for enlightening me. Though I know recursion and why you used it here, is it required to know DSA at this point?

Beautiful

Many things to learn here

Little late lol, but you don't need to add 10 padding * depth for esch node, since every node has already the cumulative padding of the previous levels. Otherwise your children will have always increasing padding compared to the previous ones

Hi Cody, I tried to build a tree using recursion and I was successful, however when I implemented a search algorithm to filter in the tree. I faced this invariant violation- rendered fewer hooks than expected. and now I am not able to move forward

thank you

thanks really helpful. for this video do you practice it beforehand or straight live coding? thats awesome if it is live coding

very interested in this

This was actually pretty straightforward, I expected it to be harder for an intermediate challenge. I feel like my imposter syndrome often acts up but most of these challenges end up being a breeze. Time to start applying for more senior roles I guess.

I think one optimization... it's possible without the nested mapping. Remove the initial mapping and pass 'entry.children' directly into then mapping there, while checking 'entry.children && ' to trigger the recursive. any who, thank you for this challenge! watched the video and jumped on the computer like "YOU CAN RECURSIVELY RENDER?!"

this is interesting. Just recently i coded a Dynamically increasing tree. - to allow fetching additional folder data from subfolders and not loading everything at once. Used a "Path" Variable, splitted it by "/" and used a recursive function to recursivly call itself until the splitted path is empty, returning the data. It looks super weird in code. But i think i got a quite good solution.

How can we adapt this solution to keep track of which sub-folder has been opened, and keep that state persistently, even though the parent folder has been closed and then reopened?

good one

Can bypass much of the react complexity by using and HTML tags

Instead of mapping over files in App component, just have a root Entry and when you nest it in App no need to reimplement mapping there.

It would be more easier if you used the details tag of html, don't you think?

Where do you get these react challenges? Or do you just randomly think about it or came across it

I have a year 2months of experience as full stack developer and I just applied for a job that required 3 years of experience as frontend developer the phone screen was ok and they move me to the next role how do I prepare it in one week ? I will appreciate any advice here

Don't forget to add some maximum depth to prevent infinite recursion

how to setup auto complete optional chaining?

how to do you switch to the browser behind the vs code and the mouse stays on the same position?

What if files was just an array of objects instead of files being an object with the children key ?

I aspire to someday be a Frontend Developer (never applyed to jobs cause i didn't study cs and feel like I'm not enough).. and when I saw that this is Intermediate I feel like I'm already a "Senior" cause this looks pretty easy to me.. So my question is, how much should I ask for when I get an offer? :)

How does the isExpanded && () work?

From.where do u find these questions is there any website for daily react js challanges

nice

Nested drop-down list?

That's called accordion and it is an easy one

Is vite better than yarn? or whats the diference between them?

There's an html tag called details that would've been better suited for this

Hi where do you get your practice questions from?

i think there is a tiny bug in your isExpanded logic.If u click the button all other files expanding ,in my opinion expanding state must be unique for all parent files and toggle it individually.

Can someone tell me where he used the recursion?

Is this consider intermediate/advanced? I believe there must be harder questions than this that are for begginers

hello bro, my question is out of the topic but does RTK still makes sense with NextJS 13 app directory? or any state management you suggest to be use?

13 min video to make that, probs a good hour for me😂 (I'm a beginner btw)

Typescript does seem a lot of extra boilerplate and work

Get well soon, Web Dev Junkie 🙏🤗. Thanks for the video 🍉😉👍!

Amazing! Just speak a bit slowly and up please. Not only native english speakers watch you!

123

Bro can you make better title?

This is what i was asked yesterday, and i solved it after the interviewer was gone

I just wanted a simple mockup tree from an acual folder and came up with this in PowerShell, you do however need to pipe it to "Convertto-Json -depth 100" after to format it correctly. function Get-HTMLFileTree($dir) { $folder = Get-Item $dir $html = [System.Collections.ArrayList]@() $obj = [PSCustomObject]@{ name = $folder.name } if ($folder.Mode[0] -ne 'd') { $html.Add($obj) | Out-Null; return $html } $obj | Add-Member -MemberType NoteProperty -Name children -Value ([System.Collections.ArrayList]@()) $children = $folder | Get-ChildItem foreach ($child in $children) { $obj.children.Add((Get-HTMLFileTree -dir $child.FullName)) | Out-Null } $html.Add($obj) | Out-Null return $html } (ex. Get-HTMLFileTree -dir . | Convertto-Json -depth 100 | Set-Clipboard)