Gain insights into React updates since V16, including new lifecycle methods, context API, and hooks. Discover how to utilize these features for writing better modern React applications.

What’s new with React? New lifecycle methods, context API, hooks, and lots more. While the fundamental principles of React have stayed the same, the way we write React apps has changed with each new release.  

If you learned React a while back, it’s possible that you haven’t been up to date with every new feature/release. It’s also possible to get lost in all the new features. Where exactly do you start? How important are they for your day to day use?

This course is your one-stop reference to most important React updates since V16 was released. We’ll walk through all the major features of modern React so you can stay in sync with the most recent changes while learning to write better software.

Reintroducing React: V16 and Beyond

## React Phases

Conceptually, React does work in two phases: 

* The **render** phase where components are rendered and the virtual DOM *diffed*.

* The **commit** phase where actual changes in the virtual DOM are committed to the DOM. 

The graphical representation you see on the far right of the profiler represents the number of commits that were made to the DOM during your interaction with the app. 

Whenever you interact with the app components, a commit happens.


# React Phases

Conceptually, React does work in two phases: 

* The **render** phase where components are rendered and the virtual DOM *diffed*.

* The **commit** phase where actual changes in the virtual DOM are committed to the DOM. 

The graphical representation you see on the far right of the profiler represents the number of commits that were made to the DOM during your interaction with the app. 

Whenever you interact with the app components, a commit happens.


In this lesson, let's discuss how commits are useful and how to read the information provided by them.

Introduction

Lifecycle

Context API

ContextType

React.memo

The Profiler

Lazy Loading

Hooks

Conclusion

Making Sense of the Profiler Results

React Phases