Book Image

The React Workshop

By : Brandon Richey, Ryan Yu, Endre Vegh, Theofanis Despoudis, Anton Punith, Florian Sloot
5 (1)
Book Image

The React Workshop

5 (1)
By: Brandon Richey, Ryan Yu, Endre Vegh, Theofanis Despoudis, Anton Punith, Florian Sloot

Overview of this book

Are you interested in how React takes command of the view layer for web and mobile apps and changes the data of large web applications without needing to reload the page? This workshop will help you learn how and show you how to develop and enhance web apps using the features of the React framework with interesting examples and exercises. The workshop starts by demonstrating how to create your first React project. You’ll tap into React’s popular feature JSX to develop templates and use DOM events to make your project interactive. Next, you’ll focus on the lifecycle of the React component and understand how components are created, mounted, unmounted, and destroyed. Later, you’ll create and customize components to understand the data flow in React and how props and state communicate between components. You’ll also use Formik to create forms in React to explore the concept of controlled and uncontrolled components and even play with React Router to navigate between React components. The chapters that follow will help you build an interesting image-search app to fetch data from the outside world and populate the data to the React app. Finally, you’ll understand what ref API is and how it is used to manipulate DOM in an imperative way. By the end of this React book, you’ll have the skills you need to set up and create web apps using React.
Table of Contents (20 chapters)
Preface

DOM Manipulation Helpers

As mentioned beforehand, there are two functions in particular that we usually use together with Refs to gain full access and manipulate the DOM even outside our React applications' scope. These utilities are createPortal and cloneElement. The former is provided by the React DOM package and the latter comes bundled with React itself.

The cloneElement function in React

Whenever we want to change a given React component's immutable attributes – for example, its passed props – we can fall back to React.cloneElement and create a copy of this particular component and change it as we wish.

The function's signature is very similar to the fundamental element of React React.createElement. However, instead of passing type as the first parameter, we pass an element, such as a component. The return value is the same as returned by createElement which is basically a React element. cloneElement can be defined as:

React.cloneElement...