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


Hooks are functions and officially, there are **10** of them. *10* new functions that exist to make writing and sharing functionalities in your components a lot more expressive.

## `useState` Hook

The first hook we’ll take a look at is called `useState`.

For a long time, you couldn’t use the local state in a functional component. Not until hooks.

With `useState`, your functional component can use and update local state.
How interesting!

Consider the following counter application:

![](https://cdn-images-1.medium.com/max/1600/1*2909ks8DqBVC23n2Ykqe0Q.gif) 

With the `Counter` component shown below: 


Hooks are functions and officially, there are **10** of them. *10* new functions that exist to make writing and sharing functionalities in your components a lot more expressive.

# `useState` Hook

The first hook we’ll take a look at is called `useState`.

For a long time, you couldn’t use the local state in a functional component. Not until hooks.

With `useState`, your functional component can use and update local state.
How interesting!

Consider the following counter application:

![](https://cdn-images-1.medium.com/max/1600/1*2909ks8DqBVC23n2Ykqe0Q.gif) 

With the `Counter` component shown below: 

Let's learn about the useState hook and how to use it. You'll create your first React component with hooks.

Introduction

Lifecycle

Context API

ContextType

React.memo

The Profiler

Lazy Loading

Hooks

Conclusion

The State Hook

`useState` Hook