Book Image

React Native Cookbook. - Second Edition

By : Daniel Ward
4 (1)
Book Image

React Native Cookbook. - Second Edition

4 (1)
By: Daniel Ward

Overview of this book

If you are a developer looking to create mobile applications with maximized code reusability and minimized cost, React Native is what you need. With this practical guide, you’ll be able to build attractive UIs, tackle common problems in mobile development, and achieve improved performance in mobile environments. This book starts by covering the common techniques for React Native customization and helps you set up your development platforms. Over the course of the book, you’ll work through a wide variety of recipes that help you create, style, and animate your apps with built-in React Native and custom third-party components. You’ll also develop real-world browser-based authentication, build a fully functional audio player, and integrate Google Maps in your apps. This book will help you explore different strategies for working with data, including leveraging the popular Redux library and optimizing your app’s dataflow. You’ll also learn how to write native device functionality for new and existing React Native projects and how app deployment works. By the end of this book, you'll be equipped with tips and tricks to write efficient code and have the skills to build full iOS and Android applications using React Native.
Table of Contents (17 chapters)

Optimizing our JavaScript code

It's safe to say that your React Native apps will probably be written mostly in JavaScript. There may be some native modules and custom UI components, but for the most part, all of the views and business logic will likely be written in JSX and JavaScript. And if you're using modern JavaScript development techniques, you'll also be using language constructs introduced with ES6, ES7, and beyond. These may be available natively as part of the JavaScript interpreter bundled with React Native (JavaScriptCore) or polyfilled by the Babel transpiler. Since JavaScript probably constitutes the majority of any given React Native app, this should be the first part we optimize in order to squeeze extra performance out of the app.

This recipe will provide some helpful tips for optimizing JavaScript code to make it as performant as possible.

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