Putting the Native in React Native - React Native Boston

Feb 23, 20172 likes1,338 views

This document discusses React Native, a library that allows developers to build mobile apps using React. It provides an overview of React Native, including how it works, its architecture, and how it can blend with native iOS and Android components. It also recommends resources for learning more about React Native, especially the official documentation.

moduscreate.com @ModusCreate
Putting the Native in
React Native
Stan Bershadskiy
@stan229 || stan@moduscreate.com
@ModusCreate
2/22/2017

About me
• Architect at Modus Create
• Organizer for NYC.JS
meetup
• Been hacking away at RN
for >1.5 years
• Frequent speaker at
Conferences & Events

• From UI to Deployment
• Not just the “How”, but the
“Why” too!
• >500 pages of goodness
• Get your discount code :)

About Modus Create
• Product Studio specializing in mobile & web apps
• Globally distributed agile teams
• Published Authors & Speakers
• Tech Community Organizers (4500+ Member
Meetups & Conference Hosts)

moduscreate.com @ModusCreate
React is an ecosystem
React
React
Native
FluxRelay
FlowGraphQL
Nuclide

moduscreate.com @ModusCreate
React powers so many things
React
Web
iOS
Android
OS XTV OS
UWP
VR

moduscreate.com @ModusCreate
•A Library
•Binds your JSX code to
•iOS Cocoa Touch
•Android UI
•Custom Layout system
•Comprises a suite of technologies
•Applications run at near full speed*
•Architecture is scalable
•Library is highly extensible
•BSD Licensed
What is React Native?
Native App
React Native Library
JavaScript Engine
React JS
React Native JS
Library
Your App Code
*Business logic in JavaScript is fast, but still interpreted

moduscreate.com @ModusCreate
Deeper Look - Threads
Shadow Queue Main JavaScript
Layout Native SDK Biz Logic

moduscreate.com @ModusCreate
Deeper Look - Runtime
JavaScript Thread
Main Thread
Event Loop
JS Call
Native Call
EventEmitter
M
essage
App
Event

What was one of
the first uses of
React Native in
production?

moduscreate.com @ModusCreate
React Native iOS Architecture
UIApplication
UIWindow
UIViewController
RCTRootView
<UIView>

moduscreate.com @ModusCreate
JSX <> iOS Controls binding
<View /> RCTView
<ScrollView /> RCTScrollView
<Slider /> RCTSlider
<PickerIOS /> RCTPicker
JSX Classes React Native Classes
ReactNativebridge
UIView
UIScrollView
UISlider
UIPickerView
UIKit Classes

moduscreate.com @ModusCreate
React Native Android Architecture
Application <ReactApplication>
ReactActivity
ReactActivityDelegate
ReactRootView
<FrameLayout>

moduscreate.com @ModusCreate
Android NDK
JavaScript
JSX
How does it work?
JavaScriptCore
Android SDK
JNI
Magic
Mostly
Same

moduscreate.com @ModusCreate
Android NDK
JavaScript
JSX
Message Travel
JavaScriptCore
Android SDK
JNI
topTouchStart
id
parameters
RCTScrollView
moduleId
methodId
params
UIManagerModule
measure(params)

moduscreate.com @ModusCreate
Native & React Native Architecture
Native App
React Native Library
JavaScript Engine
React JS
React Native JS
Library
Your App Code
Native View
Controller

Putting the Native in React Native - React Native Boston

moduscreate.com @ModusCreate
How!?
Application
ViewController
TextField
Embedded 
ViewController
Native
Module
Bridge
Event
Emitter

moduscreate.com @ModusCreate
Sample Code
https://github.com/PacktPublishing/React-Native-Cookbook

moduscreate.com @ModusCreate
The Great Debate
OR

moduscreate.com @ModusCreate
The Verdict
AND

What’s the best
React Native
resource out
there? :)

moduscreate.com @ModusCreate
● React Native Official Documentation
● Modus Create Blog (shameless plug)
● Use React Native
● React Native GitHub issues
Further Learning

moduscreate.com @ModusCreate
Thank you!
Any questions?
Stan Bershadskiy
@stan229 || stan@moduscreate.com
@ModusCreate

This document provides an overview and introduction to React Native, including: - What React Native is and the problems it solves like enabling cross-platform development using a single JavaScript codebase. - The technologies that comprise React Native like ReactJS and how it binds to native platforms. - Getting started with a basic React Native app and examples of extending it with custom modules. - An overview of the React Native component library and APIs. - Recommendations to get familiar with related technologies like JSX, Flow, and Node.js. - Thoughts on the benefits and challenges of developing with React Native.

Hands on react nativeJay Nagar

This document provides an overview and introduction to building mobile apps using React Native. It discusses React Native's cross-platform capabilities and advantages over hybrid and native mobile development. The agenda covers setting up the React Native environment, using JSX and ES6 features, creating components, integrating APIs, and handling navigation. Code examples demonstrate basic components, using state, debugging, styling with Flexbox, and fetching remote data. The document aims to help readers get started with React Native development.

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React Native is all about combining great user experience on native platforms with the developer experience of React on the web. Since it’s start 1.5 years ago, React Native continuously enjoys a tremendous traction. In 2015 React got popular, I believe 2017 will be the year of React Native. I followed the development since the start and now built several React Native apps. During my talk I like to introduce the library, show useful tooling and give practical advice for building React Native apps.

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React Native is an open source JavaScript library created by Facebook that allows developers to build mobile apps using React. It enables sharing of over 85% of code between iOS and Android apps. Many companies including Facebook, Microsoft, and Samsung use React Native. React Native uses the same fundamental UI building blocks as regular iOS and Android apps while allowing developers to write code using JavaScript and React.

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This document introduces React Native, which allows developers to build native mobile apps for iOS and Android from JavaScript. React Native uses React to construct mobile user interfaces and allows sharing of code across platforms. It renders native UI components rather than webviews, supports flexbox layout, and exposes platform APIs. Developers can build full-stack universal apps that share code between web and mobile using React Native and tools like Redux. It provides benefits like hot reloading, native performance, and the ability to add it incrementally to existing apps.

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This document provides an introduction to React Native, including prerequisites, key concepts, architecture, libraries, and demos. React Native allows building mobile apps using React that work on both iOS and Android. It provides a native experience while allowing code reuse between platforms. Popular libraries that complement React Native development include React Navigation, React Redux, and NativeBase. The document demonstrates building a simple "Hello World" app and a production app with features like custom fonts and REST API integration. It discusses challenges like frequent React Native updates and debugging tools like Chrome and Reactotron.

React NativeFatih Şimşek

React Native is an open source JavaScript library created by Facebook that allows developers to build mobile apps using React. Over 500 companies use React Native including Facebook, Microsoft, and Samsung. React Native enables developers to write once and deploy their code to both Android and iOS, bridging native components while providing a native experience. It uses the same fundamental UI building blocks as regular Android and iOS apps.

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The document discusses React Native, a JavaScript framework for building mobile apps using React. It allows building iOS and Android apps using one codebase by rendering native UI components. Some key points covered include: - React Native uses JavaScript to build mobile apps that render native components, bridging to native platforms. - It offers native experience and performance while allowing 80% shared code between iOS and Android. - Styling uses Flexbox layout model similar to CSS. - JSX combines JavaScript and XML syntax to create views using single file components. - The document provides an overview and demo of building a basic React Native app.

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React Native is a new technology that allows building real mobile apps using only JavaScript. It is a JavaScript framework for writing, debugging, and deploying both iOS and Android mobile applications with native experience. React-Native allows developers to share about 80% of code between iOS and Android which make the development is 5x faster than traditional means. React-Native libraries are created by Facebook released in March 2015. It was proven by many world-class mobile applications, such as Facebook, Facebook Ads Manager, TaskRabbit, QQ, Discord, SoundCloud, etc.

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