ValueListenableBuilder and ValueNotifier in

In this video I will show you how ValueListenableBuilder and ValueNotifier can be used to optimize the number of re-build of you widget tree. Using this widget you can easily re-build only selected widget from the widget tree improving the performance of your Fluter app.
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[@roblesrt]

Your before and after implementation of the ValueListenableBuilder + ValueNotifier makes it easy to understand the concept. How I wish every content creator does this pattern of teaching. Thanks for sharing!

[@DevKage]

Thanks man!🤘🏼

[@rick_from_yr]

Very good explanation

[@DevKage]

Thanks 🤘🏼

[@rajun9852]

Great way of explanation👏👏

[@DevKage]

Glad to know that you liked it! Thanks for watching 🙂

[@SrikanthNandiraju]

Excellent. Succinct and right to the point. You are a Flutter Rockstar! Keep going.

[@DevKage]

Thanks for those kind words!

[@purvikrana2156]

This is really a well explained video. Could you explain ValueNotifier by passing an object of class which contain a int value instead of passing directly a int . I am bit confused with Passing my whole object value with ValueNotifier.

[@DevKage]

I'm implementing something similar for my flutter app development series. That video will be available on coming Wednesday. So hopefully that will help you.

[@adilmourahi]

Great, thank you

[@DevKage]

Thanks for watching!🤘🏼

[@mruduladdipalli5417]

Great 🔥

[@ArtswinNati]

how about using ValueNotifier on different page?

[@DevKage]

It does not matter if ValueNotifier is defined on same page or on a page way before its use. As long as you make sure that the ValueNotifier object is fully initialized and non-null before using it as a 'listenable' in a ValueListenableBuilder() widget, everything should work just fine. If you want an example you can take a look at this video where I have defined 2 ValueNotifiers a members of a class and have used them on a totally different place. ruclips.net/video/tZTaDc9QRm8/видео.html

[@shivarajsajjan3000]

My target widget is dependent on 3 value notifiers. In that case how to use this ValueListenableBuilder.??

[@DevKage]

I've published a package for doing exactly this, called MultiValueListenableBuilder. Unfortunately I haven't made a video on that package yet. But from the example, it should be easy to understand how to use it. Here is the link: pub.dev/packages/multi_value_listenable_builder

[@shivarajsajjan3000]

@@DevKage Yes. I looked at your package. It's great. You are amazing! 🙏
Wanted to understand one thing, I have used nested ValueListenableBuilder i.e., next ValueListenableBuilder inside builder of first ValueListenableBuilder. Like this total I have used total 3 nested ValueListenableBuilder. It's working.
Could you please tell me, which one is better w.r.t. performance. Is your package better or nested ValueListenableBuilder.?
Why am I asking is, nested ValueListenableBuilder took me 10 lines of code. Is it better to add package or these 10 lines of nested code.?

[@DevKage]

If you compare performance of my package and your nested code, most probably you'll not see any performance difference. This is because internally my package also uses nested ValueListenableBuilder widgets. 😅
Ignoring the fact that this package is written by me, I'll personally prefer writing my own code instead of using a package for simple cases. Having less dependencies is always better. 🤘🏻

[@shivarajsajjan3000]

@@DevKage Thank you.🙏 ಡೆವ್ ಕಾಗೆ ಅವರು ಕನ್ನಡದವರಾ.?😀

[@DevKage]

I didn't get this completely, but no, it is not related to that. It is more like "Hokage" from the anime Naruto. 😅

[@Cherupakstmt]

That is great explanation. Thanks

[@DevKage]

Thanks!

[@anaydamledamle2546]

Good content. I got what I was looking for. It was a bit over complicated on StackOverflow. Your version is easy. Keep it up!

[@DevKage]

Thanks for watching! Glad to know that it was helpful for you. 🙂

[@FlaviaSierro]

Ohh, Look nice, but I didnt understant very well for putting on my own code, could you help me please? Can you tell me your email?

[@DevKage]

Sure why not. It's [e-mail]. You can also join this telegram group t.me/joinchat/OaRTa0zXZaJyjWOlUa2Wtw

[@FlaviaSierro]

@@DevKage okay, I will sent you a messege today :)

[@thongtech1984]

exceptional explaination.

[@DevKage]

Thanks☺️

[@athulkumar9370]

Nice presentation!

[@DevKage]

Thanks!

[@poochaser6618]

How to change the color

[@DevKage]

Which color?