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

### Expected Results

When I need to profile an application, specifically during a certain interaction within the app, I like to set the baseline for what I expect in terms of performance. This sort of expectation helps you retain your focus as you delve into interpreting the results from the Profiler. 

### Withdraw Functionality
Let’s consider the bank application we want to profile. The interaction in the bank app is simple. You click a pair of buttons, and the withdrawal amount is updated. 



# Expected Results

When I need to profile an application, specifically during a certain interaction within the app, I like to set the baseline for what I expect in terms of performance. This sort of expectation helps you retain your focus as you delve into interpreting the results from the Profiler. 

# Withdraw Functionality
Let’s consider the bank application we want to profile. The interaction in the bank app is simple. You click a pair of buttons, and the withdrawal amount is updated. 



In this lesson, we'll discuss the working of the app along with its expected behavior.

Introduction

Lifecycle

Context API

ContextType

React.memo

The Profiler

Lazy Loading

Hooks

Conclusion

Noting the Expected Behavior

Expected Results

Withdraw Functionality