trackBy - Efficient for loop in angular | Improve Your Application Performance with trackBy

[@PROcrastiDRIVESVofficial]

THANK YOU!!!!!! I SPENT F*****G HOURS TRYING TO FIND A SIMPLE EXPLANATION FOR HOW THIS WORKS!!!!! F*****G ANGULAR DOCUMENTATION IS F*****G SH*THOUSE!!!!!! YOU'RE VIDEO EXPLAINED IT PERFECTLY AND I FINALLY FIXED A BUG I SPENT A WHOLE DAY ON!!! YOU'RE A HERO!!!!!!!

[@healthyliving4530]

Thanks for the so much effort you have put , really appreciate it :)

[@gwynethpena5305]

Thank you. This is awesome. This is my first time to encounter trackby. So happy that I come across your channel.

[@poormancodespmc4598]

I was struggling to improve a feed with lots of posts. I was rerendering the whole list each time. Now I am going to fly 😀

[@rajansharma3171]

thanks for this, best teacher on youtube

[@estevesporai2758]

Wow, this channel is a treasure.

[@hanmingzheng5592]

I did some experiments with trackby and I think the benefit is limited. Angular will not rerender existing DOM array item if we do: 1. this.users.push(newUser) 2. this.users = [...this.users, newUser] the case I can think of that this trackby might make a diff is when we refetch data from an api and we have to create new references of each item. And even this, it might make sense to rerender the exiting DOM, and... this is really case by case. and having to add trackBy function is more boilerplate. I guess what I mean is, it is good to know this trackBy but dont get too caught up on this. if ur app is slow, then there is a small chance that this might be the cause.

[@pruthvi7798]

Good Explanation

[@sona4612]

Wow.. great explanation..❤️❤️❤️

[@HM_Milan]

you are amazing brother.super explanation thank you

[@jagadeeshmanoharan9613]

Very Useful. Thank you so much. Keep doing.

[@shibinjohn2792]

Very helpful video brother.❤

[@themysteryman-e2j]

Thank you very much for this detailed version

[@danieloseka6745]

Thank you very much . twas a nice enlightenment

[@mearn_ctaftsman]

Brother, you are really awesome 👍👍👍👍

[@felixurbano1199]

Excellent content! well explained ! :3

[@MihirModi-dw4lg]

If it is also re-render list when some value changes (except unique id), then what is the purpose of unique id?

[@janakaedirisinghe9549]

Right time, Right video :p

[@bhavesh2952]

very well explained buddy. thank you :)

[@reshmahussain7195]

Is it necessary to pass the index argument in trackBy function if it is not used in the body?

[@antoniocarlosdev6104]

Amazing!!!

[@siddharthatyagi3744]

Well selection of Topic.

[@lipiprajapati8322]

Hii subhrat, I am fetching data from json file where data present as an array like parent with some child, by a service. I am getting all data with parent and child in console and DOM. But when I am going to interpolating individual child value, I am getting undefined. So, how can I print child value in DOM??

[@FunOfHeuristic]

Use optional chaining like user?. employe[0]?.name

[@Semma_Bore]

Any other techniques to improve performance

[@igorpwn]

Do not use functions in your interpolations, use Pipes!

[@FunOfHeuristic]

One simple, don't do like this [name]= " 'your name' ", the corect approach is name="your name". Here name is a input property

[@ankush3707]

@@FunOfHeuristic hi subrat i love your videos great work can you please provide a video on this above thing or a link would be very much aprreciated

[@FunOfHeuristic]

@Ankush please check the playlist on Angular performance optimisation.

[@kemidinaveen9843]

you need to make audience more involved

[@FunOfHeuristic]

Any tips, it will be helpful

[@harshshah5511]

Sir your videos are very informative, but we find it difficult to understand what you are trying to convey

[@nitikeshpattanayak2089]

DON2=BINOD

[@FunOfHeuristic]

Ha ha ha 😅