Intro to Tic Tac Toe

[00:00] So this exercise is just to get you a little bit more experience playing around with state and managing state. So we're going to be building tic-tac-toe. It's going to be fun. One thing that we're going to be doing in this exercise that we haven't done so much in previous ones is I kind of mentioned this in passing a couple of times,

[00:18] but our state updater that we get back from useState can, in fact, be passed at a function which returns the new state. And that function will be called with the current stater or what the previous state will be when we're done. And so that allows us to encapsulate

[00:37] some of our logic a little bit better and also helps us to avoid some stale references to old versions of state, like if you're doing something asynchronous. So yeah, there are a number of benefits to using the function version over just

[00:53] passing the actual value you want to have set. And so we are going to be utilizing that in this set of exercise steps for building out tic-tac-toe. But it's going to be fun. You're going to be doing some state stuff, but you're also going to be doing some useEffect stuff.

[01:11] It's, yeah, I think that you're going to have a good time with this. We're even going to be working with local storage and have a game history feature. It's going to be a lot of fun. So let's get into it.

In this workshop, we'll learn how to use hooks to manage state, synchronize side-effects, generate unique ids, and more. 

**You'll get a solid understanding of the basic hooks and how to use them.**

We'll be covering these hooks: 

- useState
- useEffect
- useRef
- and useId

At the end of the workshop you'll put everything you learned together and build a Tic Tac Toe game with game history saved in local storage!

## Managing UI State

React's App Lifecycle: Initial Render → Create the DOM → User Interacts → State Changes → Re-render → Update the DOM → Repeat.

Here, you'll be learning how to use the `useState` hook and about the cycle of user interaction, state changes, and re-rendering. The core of how React works!

## Side-Effects

In this section, you'll learn about the `useEffect` hook.

`useState` is for component state, and `useEffect` is for managing side-effects (things that happen outside our react components).

Things outside our react components include:

- Browser APIs like local storage, geolocation, media devices, etc.
- Integrations with third-party libraries like D3, Chart.js, etc.


## Lifting State

A common question from React beginners is how to share state between two sibling components. 

The answer is to "lift the state!" 

But, sometimes you'll find yourself in the opposite situation, where you have state that's lifted too high and doesn't need to be shared. So, in this section, you'll also be learning how to "colocate state."

## DOM Side-Effects

Sometimes, you need to update the DOM directly, like if you're needing a library that interacts with the DOM or ar dealing with focus management. 

To do this you'll learn about how to use both the `ref` callback and the `useRef` hook. 

## Unique IDs

Form input elements need to have globally unique `id` attributes. But, you're also building reusable components in React. 

How do you make sure that you're getting unique IDs?

In this section, you'll solve this problem with the `useId` hook.

## Tic Tac Toe

Here's where it all comes together!

You'll practice all the skills you learned over the course of this workshop by building a Tic Tac Toe game with game history that gets perserved in local storage. 

It's tougher than the other exercises. But, after you get through it, you'll have really solidified everything you learned.

Learn React hooks to add interactivity to your apps and build dynamic websites. You'll learn the core React hooks including useState, useEffect, and useRef.

React Hooks

Kent C. Dodds

React Fundamentals

Advanced React APIs

React Suspense

Advanced React Patterns

React Performance

React Server Components

Interviews With Experts

Epic React Pro

React Hooks Intro

Intro to Managing UI State

useState

Controlling Inputs

Derive State

Initialize State

Init Callback

Dad Joke Break Managing UI State

Managing UI State

Intro to Side-Effects

useEffect

Effect Cleanup

Dad Joke Break Side-Effects

Side-Effects

Intro to Lifting State

Lift State

Lift More State

Colocate State

Dad Joke Break Lifting State

Lifting The State

Intro to DOM Side-Effects

Refs

Dependencies

Primitive Dependencies

Dad Joke Break DOM Side-Effects

DOM Side-Effects

Intro to Unique IDs

useId

Dad Joke Break Unique IDs

Unique IDs

setState callback

Preserve State in localStorage

Add Game History Feature

Dad Joke Break Tic Tac Toe

Tic Tac Toe

Outro to React Hooks 

React Hooks

React Hooks

Transcript

Intro to Tic Tac Toe

Transcript