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React and React Native

React and React Native

By : Mikhail Sakhniuk, Roy Derks, Adam Boduch
4.3 (10)
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React and React Native

React and React Native

4.3 (10)
By: Mikhail Sakhniuk, Roy Derks, Adam Boduch

Overview of this book

Welcome to your big-picture guide to the React ecosystem. If you’re new to React and looking to become a professional React developer, this book is for you. This updated fifth edition reflects the current state of React, including React framework coverage as well as TypeScript. Part 1 introduces you to React. You’ll discover JSX syntax, hooks, functional components, and event handling, learn techniques to fetch data from a server, and tackle the tricky problem of state management. Once you’re comfortable with writing React in JavaScript, you’ll pick up TypeScript development in later chapters. Part 2 transitions you into React Native for mobile development. React Native goes hand-in-hand with React. With your React knowledge behind you, you’ll appreciate where and how React Native differs as you write shared components for Android and iOS apps. You’ll learn how to build responsive layouts, use animations, and implement geolocation. By the end of this book, you’ll have a big-picture view of React and React Native and be able to build applications with both.
Table of Contents (33 chapters)
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1
Part I: React
16
Part II: React Native
31
Other Books You May Enjoy
32
Index

Fetching list data

Commonly, you’ll fetch your list data from some API endpoint. In this section, you’ll learn about making API requests from React Native components. The good news is that the fetch() API is polyfilled by React Native, so the networking code in your mobile applications should look and feel a lot like it does in your web applications.

To start things off, let’s build a mock API for our list items using functions that return promises just like fetch() does:

const items = new Array(100).fill(null).map((v, i) => `Item ${i}`);
function filterAndSort(data: string[], text: string, asc: boolean) {
  return data
    .filter((i) => text.length === 0 || i.includes(text))
    .sort(
      asc
        ? (a, b) => (b > a ? -1 : a === b ? 0 : 1)
        : (a, b) => (a > b ? -1 : a === b ? 0 : 1)
    );
}
export function fetchItems(
  filter: string,
  asc: boolean
): Promise<{ json: () => Promise<{ items: string[] }> }&gt...
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