How Does React Actually Work? React.js Deep Dive #1

Have you ever wondered, how does React actually work? In this video, we will explore what is really happening behind the scenes. First, we will learn about React elements, components and component instances. Then, we will move to React Reconciliation along with the Diffing algorithm, which is the very core of React. Afterwards, we will move to rendering and to the renderers themselves, looking specifically at React DOM. Finally, we will learn about the ways React communicates with the renderers.
Timestamps:
0:00 Introduction
0:35 React components, elements and component instances
5:34 Reconciliation
7:11 The Diffing algorithm
11:00 Rendering
12:23 How React communicates with the renderers
14:12 Ending
Notes:
Check what is happening behind the scenes: babeljs.io/repl
The $$typeof property: overreacted.io/why-do-react-e...
Create your own renderer: reactjs.org/docs/test-rendere...
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►Website: www.philipfabianek.com
►GitHub: github.com/philipfabianek
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#ReactJS #ReactDeepDive

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Before this, I was working BLINDLY on React and any other library or framework that is out their. This very content opened my EYES 👀.

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[@PhilipFabianek]

Thank you!

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I have worked as a React developer for four years and I never understood why you have to import React and neither why you can't use the index as a key. Very good and clear explanations. I will have an interview for a React job on monday and this definitely helps me! Thank you! 😃

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One of the best videos for those who want to dive deep into the React and the source code.

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[@PhilipFabianek]

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Amazing content - I can see more clearly what is going on with renders and generally better understand the reconciliation process. Thank you 🙏

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Please bring more videos like this

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crisp and clear, loved the explanation!

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Nice brief high-level overview of the source code and core deep fundamentals

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This video deserves million views.

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The Best 'React Under the Hood' explanation!!

[@PhilipFabianek]

Thank you!

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great content...even watching this single tutorial, learned much more than reading articles online...

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Incredible content, I daresay this was never explained better! Thank you 🙏🏽

[@PhilipFabianek]

Thank you!

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I've switched from Angular to React. This video is very helpful. Thank you for sharing your knowledge ;)

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Great work. Thank you for the detailed explanation 💜

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This type of quality and depth is hard to find easily and for free. Thank you for your understanding and great explanation.
the much deeper dive, the better
thanks

[@PhilipFabianek]

Thank you, glad it was helpful!

[@pq6688]

Brilliant content. World-class content. Keep it up Philip, it's amazing.

[@PhilipFabianek]

Thank you, much appreciated!

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Super awesome & fantastic lessons, rarely encounter such a deep dive React tutorial on TH-cam.

[@PhilipFabianek]

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I've never seen such an informative video about React before. Thank you very much for presenting such a video to us.

[@PhilipFabianek]

Thank you for watching, glad it was helpful 🙂

[@hansschenker]

Thank's a lot for this React deep dive - I myself would not have been able to dive so deep into react!

[@PhilipFabianek]

Thank you!

[@DiaryOfMuhib]

Awesome. Keep up the good work

[@naturalguardian5885]

Awsome work ! keep going this !

[@k303k]

Your channel is a work of art.I'm new to your channel.I've been learning Reactjs for about like 4 months and i was looking for like how React works behind the scenes .Your channel is a masterpiece.Thank you so much.Can we expect like Nextjs series Deep dive series if you have times sir?Thank you....

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Great video , thanks brother it helped alot to understand react better.

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great explanation. Thanks so much

[@aaadesh]

Thanks for such a great content Philip!🖖

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It was really very insightful. Learned a lot in those 15 minutes. Thanks for that Philip.

[@PhilipFabianek]

Thank you for the kind words.

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[@PhilipFabianek]

Thank you very much!

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Amazing! Tks for share.

[@StryKhymorodnyk]

It is the greatest explanation I have seen! I say it, as I have just kind of ended self-learning JavaScript and was wondering about React.js's hard-mode. It is good that you show it like that, because when I have seen the other's 'let's create-react-app' and so on, I just felt as if I forgot all I knew!
I have to switch, due to war. Even my 2 diplomas are just for fun. That is where English and German are useful.
Thank you, Philip! My best friend lives in Prague since 2008. He helps me in learning, but I couldn't have understood React, even with his help! You have helped! Great

[@PhilipFabianek]

Thank you!

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[@PhilipFabianek]

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Thank you... Really informative 👍

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Indeed, it was the best video on this topic, take my gratitude, sir!

[@PhilipFabianek]

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incredible explanation!

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[@PhilipFabianek]

Thank you!

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One of the best insights of react internals (even I couldn't found this kind of info in paid course's as well), amazing work Philip Thank you so much for such a great series.

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[@PhilipFabianek]

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[@wxq521]

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[@PhilipFabianek]

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[@prathameshkhetre1494]

00:00 Understanding the basics of React
01:50 A React component is a class or function that outputs an element tree.
03:44 React elements, components, and instances
05:42 React uses a virtual DOM to efficiently update the real DOM
07:38 React's Diffing algorithm relies on two important assumptions
09:33 React's reconciliation algorithm explained
11:30 React renderers generate and insert elements during reconciliation.
13:25 React communicates with renderers using dispatchers.

[@user-fg6ng7ej6w]

great series on internals. please keep showing us react guts

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[@PhilipFabianek]

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[@PhilipFabianek]

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[@PhilipFabianek]

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Thank you man for this awesome content.

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