Learn Aria, Ember and Redux

A large number of people are unable to use the web effectively due to an impairment or disability.

As developers there are several tools and techniques we can use to make our web applications accessible, ensuring a great user experience that includes everyone.

We all agree that Accessibility is important. However, it’s a broad landscape and can be overwhelming figuring out where to start!

Erin Doyle is an expert in creating accessible React applications and has developed a course that will give you a concrete process for testing, refactoring, and building your applications with accessibility in mind.

After this course, you'll have a jump start on auditing and fixing accessibility issues in your applications and gain a better understanding of your target users and how to approach your web app design from their perspectives.


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

Develop Accessible Web Apps with React

At a high level Redux is just a dispatching system, sitting atop a finite state machine, driving our application state. It just so happens that the State ADT is good at modeling a finite state machine. It allows us to represent our stateful transactions in discrete, easily composed transactions. We can create complicated stateful transitions by composing many simple transitions into one state transaction. By using the State ADT, we should be able to model all of our application state transitions and provide a single reducer function to Redux that integrates with our state machine model.

We’ll put this theory to the test by building a Memory type game called “Anger The Bunny”.  We start of by defining our state transitions using the State ADT, starting with simple, discrete transactions and using them to create the complex transitions typical of any game. Then once we have a majority of our game logic implemented, we will integrate those with Redux.

Redux is a predictable state container for JavaScript apps.
It helps you write applications that behave consistently, run in different environments (client, server, and native), and are easy to test.

redux

Redux and the State ADT

Redux is a powerful way to manage application state, but that power can come with a lot of code. A single update can sometimes require changes across many files and the code required to define action creators and to handle those actions in your reducer can start to get pretty repetitive.

The redux-actions library offers a small but powerful API to help cut down on some of the boilerplate that is typical of an application that uses Redux to handle state management.

Reduce Redux Boilerplate with Redux-Actions

Working with forms can be laborious, but redux-form takes out the tedium and replaces it with an enjoyable way to create beautifully crafted forms. You get the benefit of integrating form state with an existing Redux application, plus the ability to track the state of your form with precision in Redux DevTools, without writing lots of boilerplate code.

In this course, we will use the redux-form package to create a form whose state is easy and enjoyable to manage. Over 46 minutes and 14 lessons, we will:
* find out how redux-form ties into a React/Redux application
* learn how to use both synchronous and asynchronous validation
* use real-world examples and effective ways of presenting relevant information to the user

Learn to create precise, reusable form components, and enjoy yourself in the process.

Manage React Form State with redux-form

***Note: RxJS imports have changed since the publication of this course. Operators now must be passed into `.pipe` to be applied to an observable.***

In this course we will begin with nothing more than an empty directory & a text editor. Through small, focussed lessons we’ll learn how to setup a React project that uses Redux for state management and redux-observable for asynchronous actions. We’ll see how ‘epics’ are registered and how they each receive a ‘stream’ of actions from the store. 

With an understanding of how things work, we’ll move onto solving common problems such as Ajax cancellation, creating sequences of async actions, enabling code reuse through higher-order Observables and much more. 

## **UPDATE:** 
This course is outdated, view updated material here: [Asynchronous State Management with redux-observable v1](https://egghead.io/courses/asynchronous-state-management-with-redux-observable-v1)

Up and Running with redux-observable

Managing state in modern web applications is hard. As applications grows in complexity, keeping track of state changes and mapping those changes back to your UI becomes increasingly difficult.

One way data flow makes managing state more approachable and lightens the cognitive load required to follow the flow of data through your application. Using Redux takes this idea to the next level and moves the state and the state changes and centralizes them in a global store, managed with pure reducer functions.

In this course you will learn how to build a production quality React application using Redux. We will build up from using redux by itself, so we can understand the core API and how that interacts with a React application, then we’ll move on to introduce `react-redux` to abstract away some of the underlying details and clean up our code. We’ll use middleware and a mocked API server to understand how asynchronous code fits into the Redux model and we’ll even deploy our finished work so we can see it running live in the cloud. 

If you are brand new to React, you’ll want to read the documentation and watch our free [React Fundamentals](https://egghead.io/courses/start-using-react-to-build-web-applications) course and our [Build Your First Production Quality React App](https://egghead.io/courses/build-your-first-production-quality-react-app) course. To get up to speed on Redux, you should check out Dan Abramov’s [Getting Started With Redux](https://egghead.io/courses/getting-started-with-redux) course.

Build A React App With Redux

In this course we are going to take an empty React and Redux application and add Redux Saga side effects. We’ll begin by installing saga to the app and implement a basic saga generator function. We’ll explore the saga commands provided by Redux Saga and what the difference is between blocking and non-blocking actions. 

We will also understand how to concurrently run sagas with saga helpers and how we wire everything up with the Redux store. Finally, we’ll finish up by implementing tests for our sagas.

Async React with Redux Saga

Ember is a javascript framework that provides a rich set of tools for building modern web applications. Unlike many frameworks, Ember comes with opinions and a way of doing things so you aren't left with a ton of decisions to make about problems that have already been solved very well. Ember was designed from the start to deliver a productive and comfortable experience for you, the developer.

In this course you will learn what you need to know to get started building your own Ember we applications. From the absolute essentials like creating a new project with the Ember-CLI tools, templating, routing, and reusable components.



A JavaScript framework for creating ambitious web applications.

ember

Ember 2 Fundamentals

One of the hardest things about writing non-trivial applications is managing state. In our attempt to effectively manage state, we introduce additional complexity by trying to control application flow and the amount of code volume that comes from all of this. Redux gives us the ability to address state management and communication in astonishingly simple semantics that can be explained in just a couple minutes. The beauty of Redux is that it is not only a library but a pattern that works very will within Angular 1.x applications. In this series, we are going to learn how to integrate redux (the pattern) into Eggly from scratch and then introduce **ng-redux** and add in **Redux DevTools** at the end for fun.

AngularJS is an open-source JavaScript framework, maintained by Google, that assists with running single-page applications. Its goal is to augment web-based applications with model–view–controller (MVC) capability, in an effort to make both development and testing easier.

angularjs

Build Angular 1.x Apps with Redux

Accessibility (or a11y) is an important but often neglected in the world of web development. Many developers find themselves coding user interfaces without any knowledge of keyboard or screen reader requirements. 

The fact is that accessibility doesn't happen by accident. Often it is seen as too hard or time consuming. This doesn't have to be the case. By following a handful of high-value patterns and practices, we can open our web apps to humans that otherwise wouldn't be able to interact with them at all.

This course will introduce you to accessibility through hands-on, technical examples that are way more effective than reading 10-year-old static web content.



WAI-ARIA, the Accessible Rich Internet Applications Suite, defines a way to make Web content and Web applications more accessible to people with disabilities. It especially helps with dynamic content and advanced user interface controls developed with Ajax, HTML, JavaScript, and related technologies. 

aria

Start Building Accessible Web Applications Today

This course will pick up where we left off with the [Redux Fundamentals course](https://egghead.io/series/getting-started-with-redux). If you haven't watched that yet, you are highly encouraged to do so!

You are about to learn practical production ready techniques for building your React and Redux applications. You will explore advanced state management, middleware, React Router integration, and other common problems you are likely to encounter while building applications for your clients and customers.

Even if you have already spent time studying Redux, this course will show you better practices straight from the library's creator Dan Abramov.

**[Click here to see the Community Notes on this course](https://github.com/tayiorbeii/egghead.io_idiomatic_redux_course_notes)**


Building React Applications with Idiomatic Redux

Best practices for building & testing redux applications have changed dramatically over time. This course aims to be a comprehensive and up-to-date resource for those seeking to confidently test their redux apps. Whether you're just getting started or want to improve on your existing testing strategy, there will be something in this course for you.

This first few lessons of this course look at how to add jest to an existing react/redux application that was built on top of [vite](https://vitejs.dev/). We cover basic functionality like using `npm test` vs `npx jest` and generating and using [code coverage](https://jestjs.io/docs/cli#--coverageboolean) to inform our testing strategy.

The next 10 or so lessons cover the specifics of unit testing the redux code in our application. We'll go over how to test reducers, selectors and thunks. As part of this we'll touch on mocking APIs and using [Redux Mock Store](https://github.com/reduxjs/redux-mock-store) as well as running actions through our applications' actual reducers to broaden our test coverage.

In the final part of this course we'll look at how we can test our redux connected react components using the various utilities that come with the [React Testing Library](https://testing-library.com/docs/react-testing-library/intro/). We'll cover simulating various kinds of user input with the [User Event Module](https://testing-library.com/docs/ecosystem-user-event), populating our redux store with test data, using [jest spies](https://jestjs.io/docs/jest-object#jestspyonobject-methodname), how to wait for asynchronous tasks to complete, and several approaches for finding & asserting that visual elements exist on the page.

This course is built on top of content that was created for the [Modern Redux with RTK and TypeScript](https://app.egghead.io/playlists/modern-redux-with-redux-toolkit-rtk-and-typescript-64f243c8) course and I highly recommend you start there if you haven't completed it already. It does expect a *basic* familiarity with react, redux and jest. TypeScript is used in these lessons, but is not a major focus and hopefully won't distract you too much if you prefer plain JavaScript.

No matter your experience level with redux and testing react applications, I'm confident your abilities will level up as you watch this course and follow along with the examples.

Thank you!

jest

Confidently Testing Redux Applications with Jest & TypeScript

In this comprehensive tutorial, Dan Abramov - the creator of Redux - will teach you how to manage state in your [React](/q/react) application with [Redux](/q/redux). 

[State management](https://egghead.io/playlists/react-state-management-in-2021-6732) is absolutely critical in providing users with a well-crafted experience with minimal bugs. 

It's also one of the hardest aspects of a modern front-end application to get right.

Redux provides a solid, stable, and mature solution to managing state in your React application. Through a handful of small, useful patterns, Redux can transform your application from a total mess of confusing and scattered state, into a delightfully organized, easy to understand modern [JavaScript](/q/javascript) powerhouse.

The principles of Redux aren't new, but they are packaged and presented for you in an easy to use a library that not only elevates your applications but also improves your general understanding of building JavaScript UIs.

In this course, Dan Abramov will show you the fundamentals of Redux, so that you can start using it to simplify your applications. 

There are some amazing [community notes on this course here on Github](https://github.com/tayiorbeii/egghead.io_redux_course_notes).



Fundamentals of Redux Course from Dan Abramov

In this course we take a basic shopping cart application built with React and fully power it with Redux and RTK using TypeScript. For those of you familiar with Redux Hooks, we use those here, but the emphasis is more on how the Redux Toolkit simplifies the process of setting up your redux application including building slices, reducers, selectors and thunks. Everything we do in the course is typed with TypeScript to make your application development process as smooth and powerful as possible. 

Modern Redux with Redux Toolkit (RTK) and TypeScript

Many engineers working with redux have felt burdened by large amounts of boilerplate code and confusing indirection. These apps often rely on legacy patterns that are no longer recommended, but are still commonly found in production code bases. If you are are an engineer working on such an application, this course is for you. In it I will show you how to modernize your application, with react hooks, one component at a time. At the end of it, we'll still be using redux, but the structure and content of your code will be significantly improved.

We will cover migrating class components to functional components with [react hooks](https://reactjs.org/docs/hooks-reference.html) and how to replace `connect()` with [redux hooks](https://react-redux.js.org/api/hooks). This course will serve as a good tutorial for learning react hooks. It will also help you apply  modern patterns for using redux. These patterns, powered by the new [useSelector](https://react-redux.js.org/api/hooks#useselector) and [useDispatch](https://react-redux.js.org/api/hooks#usedispatch) hooks will transform your redux applications for the better. 

Modernizing a Legacy Redux Application with React Hooks

Redux was [announced back in 2015](https://www.youtube.com/watch?v=xsSnOQynTHs) and immediately took off as the de-facto state management solution for React. As it gained widespread traction, it also became clear that in many cases it was brought into applications prematurely. The community in some ways started to push back on its use and recommended the built-in `setState` method as an alternative. Several other state libraries also started popping up around this time. Finally, as React Hooks were announced with a built-in `useReducer` method it appeared that Redux's time was up. However, these claims have proven to be premature. Redux is not dead and instead remains React's most popular state management library`*`. 

Recent updates to redux exposing a [hooks-based API](https://react-redux.js.org/api/hooks) address some of its most serious drawbacks and make it even more appealing. This course will show you how to apply redux to a modern react hooks application. I hope you leave this course with a continued appreciation for React Hooks and renewed enthusiasm for Redux.

Thanks for watching 📺.

---

**Notes**

- This content has been inspired by the incredible work done by [Mark Erikson](https://twitter.com/acemarke) on modernizing redux and the fantastic [Redux Style Guide](https://redux.js.org/style-guide/style-guide).

- `*` Comparing [redux](https://www.npmjs.com/package/redux) with [mobx](https://www.npmjs.com/package/mobx),  [xstate](https://www.npmjs.com/package/xstate) and [flux](https://www.npmjs.com/package/flux)

Apply Redux to a Modern React Hooks Application

Skeleton screens show users that content is loading, offering a vague preview of how content will look once it fully loads.

CSS Animations are crucial for the perceived performance purposes since it shows for the user the content is loading by using animations as feedback for whoever is accessing the page. 

Follow the steps in this course and you will learn how to create a beautiful and pleasant Skeleton Loader for your web app using CSS animations, focusing on Web Accessibility and Web Semantic.

Creating Accessible Skeleton Loader Animation from Scratch with HTML and CSS

We’ll refactor our existing code and break the pieces of the application into their own stateless functional components. We’ll use these components to build up our UI. We’ll also see how we can use ES6 destructuring syntax to accept just the keys we need from props to keep our JSX clean.

Refactor JSX in React to Stateless Functional Components

We’ll define a simple state object in the entry point of our application. Once the state has been defined, we’ll pass it into our root component as props and replace the static elements in our rendered output with values from the component’s props. We’ll move from static items to an array, seeing how we can use functions like map to render our UI.

Render in React Based on a Global State Object

Components in Ember are great for reusing code throughout our application. We’ll see how each instance of an Ember component has isolated state and we can over ride as well as set default values.

In this lesson, we will learn how to make a simple, reusable component within an Ember application.

Create Simple Components in Ember

We will learn how to use normalizr to convert all API responses to a normalized format so that we can simplify the reducers.