Introduction to React

Build a React application from scratch with us and gain confidence in developing modern web applications along the way.

  • 3-4 Days
  • Intermediate
  • In-person / Online
  • £ On Request

Your team will learn...

Understand all aspects of React development for building modern SPAs

Gain confidence developing full-stack React applications

Decompose and reduce complexity using components

Use Redux to simplify statement management


React is a second generation web framework, created by Meta to simplify the creation of complex, browser-based UIs (aka. Single Page Applications). It offers a declarative, component-based approach that enables the rapid creation of SPAs without resorting to the custom attributes and dirty checking used by Angular.

The React component model is excellent when combined with modern JavaScript (ES2015+). If you want to take React to the next level, and see React at its best, then you can use it with TypeScript and add safe coding practices. We can level set delegates as part of this delivery to use the latest features of JavaScript or TypeScript effectively with React.

As React is solely a UI framework, it needs to be combined with libraries for accessing remote services, routing and state management (such as Redux). We can customise this course to your needs to include the pieces that you want to focus on.


Introducing React

  • How Angular and React evolved from earlier frameworks
  • Overview of the React architecture and the Virtual DOM
  • The trade-offs between a Virtual DOM and dirty checking
  • Using the JSX syntax to create and initialise React Elements
  • Comparing coding in React to Angular
  • Setting up a project for React development

Modern JavaScript (Optional)

  • The let keyword and support for block scope
  • FP with Arrow Functions and the Lodash library
  • The class declaration syntax and inheritance
  • Destructuring items from arrays and objects
  • Making use of the map and set data structures
  • Enhancements to functions and creating generators
  • A standard model for proxies and promises
  • Using async await instead of and with Promises
  • The for...of loop and spread operator

Getting Started with React

  • Creating basic components that use JSX
  • Using properties to pass data to components
  • Nesting and managing parent-child relationships
  • Transpiling both JSX and ES6 using Babel
  • Adding Jest to unit test your components
  • Using snapshots for rapid unit test construction
  • Verifying component UI structure programmatically

Building Single Page Web Applications

  • Using the lifecycle callbacks for React components
  • Persisting values using the state property
  • Designing hierarchies of components for complex UIs
  • Interacting with RESTful services
  • Modularising your design for unit and integration testing
  • Building and testing a complete SPA-based Web App
  • Adding Routing to your application
  • Optimising performance by removing redundant renders

React Hooks

  • Functional Components vs Class Components
  • Reselect's evolution into React Hooks
  • Managing state with useState
  • Adding side effects with useEffect
  • The importance of memoisation to performance
  • Leveraging useMemo and useCallback
  • Writing custom hooks

Styling React Apps

  • Identifying styling options
  • Global styles and avoiding name collisions
  • Encapsulating styles using CSS Modules
  • Inline styles for dynamic styles
  • Using styled-components for dynamic styles

Advanced Topics (Optional)

  • Lazy loading components and code-splitting
  • Accessing references to HTML elements
  • Customising create-react-app and exploring other alternatives
  • Internalisation using react-intl
  • End-to-End testing with Cypress

Combining React with Redux (Optional)

  • Problems when managing complex state in SPAs
  • Using a framework to centralise and manage state
  • Creating and using Stores, Actions and Reducers
  • Manipulating your data as a sequence of transitions
  • Using Redux Toolkit to reduce boilerplate
  • Grouping state, actions and reducers into Slices
  • Asynchronous actions, thunks and Redux middleware
  • Adopting Redux Thunk as your default Redux middleware
  • Advantages of Redux Saga for more complex scenarios
  • Redux dev tools


Delegates must be proficient JavaScript or TypeScript developers. A primer in the languages can be provided to level set all delegates to the latest language features.


Introduction to React

Build a React application from scratch with us and gain confidence in developing modern web applications along the way.

  • 3-4 Days
  • Intermediate
  • In-person / Online
  • £ On Request

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