Learn Javascript, React and Scss

Learn how to build a pin-input component with state machines, Zag.js and React.

We’ll look at modeling a UI component with state machines, implementing those in a framework agnostic way using Zag.js, and connect the logic to the UI component.

This course is a must-watch if you’re unfamiliar with State machines, and want to learn how to use them to build UI components with ease.

In this course, you will:

- Learn fundamental concept of state machine, event and transition
- Model a UI component with state machine
- Connect state machine logic to UI
- Manage DOM events in state machines
- Create custom React hooks with state machines

A collection of framework-agnostic UI component patterns like accordion, menu, and dialog that can be used to build design systems for React, Vue and Solid.js

Statechart Driven UI Components with Zag.js

Jotai's state management is primitive and flexible. This gives you room to build, compose, and share state throughout your application exactly how you need it.

This flexibility can become hard to manage when you have complex requirements that span across a number of states your application can be in.

Jotai lets you leverage other state management solutions through integrations so that you can solve the problem you're facing exactly how you need to.

One of those integrations is XState. XState gives you a safe abstraction to enumerate and handle the complex states your application can be in.

With Jotai + XState, you get the flexibility and ease of use of Jotai with the power of XState.

XState is a sophisticated library to provide a better and safer abstraction for state management. 

React is one of the web’s most popular frameworks for building JavaScript applications. 

If you know what you’re doing, React can drastically simplify how you build, use, and maintain code.

Whether you’re a React newbie or you’re ready for advanced techniques, you can level-up with egghead. Explore our in-depth courses, lessons, and community resources to build more powerful applications and crack open your career.

react

Complex State Management in React with Jotai and XState

Managing state in a UI is challenging. It's genuinely difficult and the solutions require a depth of knowledge and experience to understand. Everything is a balance of tradeoffs in complexity, performance, and user experience.


This is a series of interviews with experts, open-source maintainers, and UI developers that have combined decades of experience building stateful UI applications for millions of users. 

Part interview, part screen share, these videos should benefit you if you're building web applications.

They focus on React, but the underlying principles are valid for UI work in general (and beyond).

React State Management Expert Interviews

On the surface, starting a project sounds easy. First you make some directories, install some dependencies, then you write some code.

But there's a bit more to it than just those three steps.

The type of project you're working on impacts the decisions you make. It gets more complicated when you're working on multiple projects that are related. For example, maybe you have a customer-facing frontend app, an admin dashboard app, and a single backend used for both.

How does this change your directory structures? How should you share code between projects? What happens when you add a Design System into the mix?

It can get hard to keep things straight in your head.

Nx is a tool that aims to solve these problems for you, whether you're working solo on a small full-stack app or on a dev team of thousands.

It's not just an opinionated folder structure. When you create an app with Nx, it generates unit and e2e test setups as well as preparing bundling and code-splitting with Webpack, and stubbing out common features like routing.

One of the coolest features of Nx is its Dependency Graph. The graph can visually show you the relationship between the parts of your application, and is optimized to ensure that compiling, testing, and linting only happens in the affected areas of your project.

In this course, Juri Strumpflohner demonstrates these features and more through the iterative creation of a React + Storybook + Express app. Don't worry if this isn't your preferred stack! Nx supports the most popular frameworks & libraries on the web.

More importantly, the focus of this course is more on the workflow than the implementation.

Watch Juri's course, and see if the Nx tooling & workflow is right for you and your team!

Scale React Development with Nx

jotai is a primitive and flexible state management solution for React. 

jotai gives you a minimalistic API that you can use that separates your state management from your UI. You get the benefits of well manages state AND you don't have to set up any boilerplate like defining actions, reducers, dispatchers, or stores. 

You create an atom and you're off to the races managing your application state.

In this course, you'll build an SVG drawing application. You'll see how you can represent the canvas as state through atoms and add svg path, change the path colors, delete, and even undo actions. You'll sum up your learning by learning how jotai can isolate state in your applications by using and composing Providers.

You'll be able to use the concepts you learn here to manage any state in your own application.

Manage Application State with Jotai Atoms

Listening to and responding to events is a foundational skill for building software for the web. The Document Object Model, or DOM for short, has a powerful built-in event system. And yet, many of us have a pretty basic understanding of the DOM event system and only scratch the surface of the available power. 

This lack of understanding leads to bugs in our applications and writing lots of code to work around the DOM event system rather than leveraging it. The goal of the course is that you will walk away with the confidence to successfully and meaningfully engage with the DOM event system.

The DOM event visualizer [domevents.dev](https://domevents.dev) will be used to explain many behaviors throughout the course. You are welcome to play with the visualizer yourself to continue your learning

JavaScript® (often shortened to JS) is a lightweight, interpreted, object-oriented language with first-class functions, most known as the scripting language for Web pages, but used in many non-browser environments as well such as node.js or Apache CouchDB. It is a prototype-based, multi-paradigm scripting language that is dynamic, and supports object-oriented, imperative, and functional programming styles.

javascript

Your Ultimate Guide to Understanding DOM Events

In the course, we will learn how to use the `styled-components` library to style our React applications. We will start from the basics and dwell in more advanced cases.

With this course, you can get the necessary knowledge to use the `styled-components` library to style your React applications in the future.



Styling React Applications with Styled Components

In this collection, we'll go through each of the standard hooks offered by the React library, learn how they work and build small applications that leverage them internally.

React Hooks: Revisited

It's tempting to pick up a framework which has preselected flexbox or grid as the layout tool of choice, but it's important to learn when and why to use each method. This leads to slimmer stylesheets which results in better site performance, and less likelihood for "hacks" to make one method do what the other does inherently better. 

Throughout this collection, we will be progressively styling a responsive landing page template while building your knowledge on when to select grid or flexbox for any layout scenario. Spoiler alert: sometimes the best solution is using both!

The specification describes a CSS box model optimized for user interface design. In the flex layout model, the children of a flex container can be laid out in any direction, and can “flex” their sizes, either growing to fill unused space or shrinking to avoid overflowing the parent.

flexbox

Create a Landing Page with CSS Grid and Flexbox

Una revisión de las nuevas características que la nueva versión de Javascript ES2020 o ES11 trae para esta iteración.  

Nuevas Características de ES2020 en JavaScript

In this course, we'll build a video course platform using the AWS Amplify Admin UI. 

The Admin UI provides simple yet powerful tools to model database tables, add authentication and authorization, and manage app content, users, and groups. It also offers the ability to manage the application users and content. 

The AWS Amplify Admin UI focuses on data types rather than backend infrastructure. 

All the backend resources generate infrastructure as code (IaC) templates that can be committed in the team repository and integrated with AWS Amplify continuous deployment workflow to manage the different environments.

Before taking this course, you should have a basic understanding of React Hooks.

Get Started with the AWS Amplify Admin UI

### Accept payments & sell products powered by Stripe and the best of the JAMStack

There are as many ways to build an e-commerce store on the internet as there are products to sell. One thing is for certain, e-commerce is here to stay and as professional developers we need to understand how to build fully custom stores for our clients using the best modern tools available.

- React: flexible and customizable while following modern best practices
- Next.js: lightening fast with guide rails to help your project perform as consumers expect
- Stripe Checkout: lets you offload reams of complicated business logic to a trusted third party that maintains regulatory compliance, global payments, and a standard UX.

Your store will have well managed local component state using React Hooks and you'll also have clear and cohesive shared (global) state with React Context.

Finally you'll deploy your custom store to Vercel (the platform behind Next.js) as well as how to make your Next.js e-commerce store portable to deploy to other platforms.

Create an eCommerce Store with Next.js and Stripe Checkout

A series of lessons to help you get more familiar with modern JavaScript syntax.

ES6 and Beyond

Add Conversation Intelligence to your video or voice application without training Machine Learning models. Integrate speech to text and all of the below capabilities, out of the box:

- Speaker Diarization
- Sentiment Analysis
- Contextual Insights
- Conversational Analytics
- Topics of Discussion
- Entity and Intent Recognition
- Pre-built UI and Symbl JS Elements

In this course we will use [Symbl.ai](https://symbl.ai/) to get transcripts for the video we will upload as well as more meaningful insights. 

Additionally, you will pick up NextJS for the main stack and will use Symbl's RESTful APIs for processing a conversation from a video and rendering transcripts to screen. Get your Symbl account [here](https://platform.symbl.ai/) and start building.

Create Contextual Video Analysis App with NextJS and Symbl.ai

[Recoil](https://recoiljs.org/) is a brand new state management library for React, developed by Facebook.

Recoil works and thinks like React. Add some to your app and get fast and flexible shared state.

This quick collection will get you up and running with Recoil, you're going to learn how to:

* add Recoil to your React project
* create a Recoil atom and use it to store a piece of state
* use `useRecoilState` hook to update an atom
* use `useRecoilValue` to access value stored in an atom in a read-only fashion
* use 🔥`selectors`🔥 in order to calculate derived data based on state stored within atoms (this is *really* powerful!) 

Sync State Across Components with Recoil in React

Get started with React! (with Hooks)

This course gets you up and running with react in **under a minute** by using codesandbox.io to skip the painful process of setting up your dev environment. 

You'll learn:

- How to write React code with JSX
- How to "think in React"
- How to use local state to store changing data
- How to pass data from parent components to children components using props

So get started now!  You need some javascript and HTML experience, but no prior React experience is needed.

React Crash Course with Hooks

If you've ever worked on a website for a business, there's a good chance you've included a map.

A Google Map embed is sufficient for showing a location, but doesn't leave you many customization options.

React Leaflet to the rescue!

In this course, Colby Fayock will guide you through a series of lessons and challenges that will build your map making skills as you build out a web app for a fictional restaurant.

You'll get practice with handling API keys and using React Hooks to implement a custom interactive map complete with metadata and additional overlays.

This course has built-in challenges that you are encouraged to pause and work through, but feel free to just watch.

Build Maps with React Leaflet

Optional chaining ?. in javascript is a new feature introduced in ES2020. Optional chaining changes the way properties are accessed from deeply nested objects. It fixes the problem of having to do multiple null checks when accessing long chain of object properties in javascript.

Optional Chaining

JavaScript is full of inconsistent APIs. Wrapping those APIs in functions allows you to have full control over how to configure them and make them more reusable.

This becomes even more beneficial when dealing with the async nature of JavaScript. You'll learn how a broadcaster is a function that wraps another function (which we call listeners) and modifies the behavior. We will build up this pattern in a way that allows you to compose broadcasters together making your code more reusable.

**You're in Section 02 of [Composing Closures and Callbacks in JavaScript](https://egghead.io/playlists/composing-closures-and-callbacks-in-javascript-1223)**

Establish Callback and Closure patterns Around Async Browser Behaviors

In the previous section, [07 Building Light Search Box](https://egghead.io/playlists/building-light-search-box-bb64), we implemented a search box with the pattern that we've built in this course. This works great but doesn't have as much business logic applied as other async scenarios.

In this section, we will implement a word game where the values coming in from the user will be piped to different listeners to be consumed. Along the way, complex business logic will be applied to determine if the user won the game or not.

**You're in Section 08, the last of [Composing Closures and Callbacks in JavaScript](https://egghead.io/playlists/composing-closures-and-callbacks-in-javascript-1223)**

Implementing a Word Game with Patterns and React

It's time to introduce a "View" to our codebase so that we can present the values in the DOM. Since React is the most popular View library, we'll convert our basic JavaScript project to a React project to demonstrate how this pattern fits.

We'll create several hooks (`useCallback`, `useListener`, `useBroadcaster`) in this section to see how you could implement the pattern in react terms.

By the end of the section, you'll know how user input is handled and how to fetch resources in React with this pattern

**You're in Section 06 of [Composing Closures and Callbacks in JavaScript](https://egghead.io/playlists/composing-closures-and-callbacks-in-javascript-1223)**

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