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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►GitHub: github.com/philipfabianek
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#ReactJS #ReactDeepDive

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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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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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Thank you!

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[@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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[@PhilipFabianek]

Thank you, glad it was helpful!

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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 🙂

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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!

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Awesome. Keep up the good work

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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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[@PhilipFabianek]

Thank you for the kind words.

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[@PhilipFabianek]

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[@PhilipFabianek]

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[@PhilipFabianek]

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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.

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