ReactJS Tutorial - 18 - Lists and Keys

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A “key” is a special string attribute you need to include when creating lists of elements.
Keys give the elements a stable identity.
Keys help React identify which items have changed, are added, or are removed.
This results in a much more efficient update of the user interface.

[sarfrazmohsin]

I have never seen a better tutorial than thiss !!! World class amazing tutorials even in 2022, no one is near you.

[ManeelxAkosAdor]

Nice man, you not only provide good examples but go into the theory too!!
Best wishes for you in your channel and life

[janmatyoo]

Your tutorials are really great for beginners, explaining everything clearly. Thank you!

[jeremyt]

thanks for explaining why the framework is built the way it is, not just how to use it. this is real teaching.

[ricardoazevedo]

You are very concise in explaining and make the learning curve a little less steeper

[sandeepa]

The best explanation I ever found so far on why Key prop is required :)

[michaelchika]

I really love how you explain things in simple terms

[VIKASSAINI]

At last someone with correct explanation on Significance of Key

[johnmarkfule]

Best react tutorial ever. A million thanks to you Vishwas.

[rajeshvermaiari]

Every tutorial video is very well explained theoretically and practically

[stinfamous]

Perfect explanations mate you nailed it ! thanks mate ;)

[AshishGupta-beyz]

while doing some projects I faced a lot of confusion on key props. You made a good clarity with nice and easy explanation. Thanks a lot!!!

[technicalshinchan]

Thank you so much sir, such type of content providing in free, big fan of you sir.

[ムネタ]

oh my GOD, thank you so much for explaining how react uses the key prop to correctly update lists!!!!

[JamesDoehring]

Man these videos are the best. Very therapeutic

[itgiants]

dude any question comes to my mind is directly been answered by you, hat off for the effort you're providing, I asked myself hmmm am I able to use key prop in the child then straight forward you mentioned that we cannot.-

[keerthivasanj]

Connecting the next video topic at last minute of the current video makes me to bite the nail 😂

[rahulghosal]

Bruce, Clark, Diana, YOu definitely a DC fan

[vigneshgvs]

Key is a reserved prop.
and need to include when creating list of elements

[toannew]

0:55 add a unique key to each item in the list
2:39 -3:49 key prop is not accessible
3:55 -- why need key prop?
7:09 summary