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

Conditional Rendering

Conditional rendering is rendering elements that may or may not be displayed on a web page depending on certain conditions or events. These conditionals are decision paths in your code, something like an if statement. We use conditional rendering to render elements when a particular decision path is hit. A good example of conditional rendering is a credit card information form that only appears when you choose credit card as your payment option. Conditional rendering allows us to use standard JavaScript conditional statements (such as if and else) to dynamically choose which components to display in our application and which ones to hide.

For example, let's look at this example:

import React, { Component } from 'react';
import './App.css';
class App extends Component {
render() {
 return (<div className="App">
    <button>Click me to show the rest!</button>
   &...