Unlock Your Project's Potential with Our Expert React Native Developers Team

High overview:

Main (UI) Thread

JS Thread

Native Modules Thread

Bonus: Render Threads (only in Android 5.0 and up)

Explanation:

React Native offers a powerful combination of React components and native views, allowing developers to create truly dynamic mobile applications.

Whenever you need to interact with native components, the business logic will run on the JavaScript thread and communicate through a bridge.

With help of this bridge, you can communicate with native modules that are shipped via the @ReactMethod annotation on Android and RCT_EXPORT_METHOD() macro on iOS. Leverage this technology to take advantage of features that may be more effectively implemented in their respective ecosystems.

Bonus or Other Valid Explanations:

React Native leverages Apple's JavascriptCore Virtual Machine to process code written in JavaScript, allowing users to create powerful mobile applications efficiently and without the need for extensive re-writing.

React native creates a digital bridge between Javascript and the mobile world by initializing a context that gives access to all required native modules for use in Javascript code.

An innovative Animated.Something and an Animated.Viewcan be leveraged with the correct style prop in order to implement transformative effects for a captivating experience.

Animated.timing(this.state.scale {

toValue: 2,

duration: 2000}).start();

{ scale: this.state.scale },

‍] }}>{ can be anything }

Should look something like this:

await AsyncStorage.setItem('@MySuperStore:key', 'I like to save it.');

By using the Platform-specific extensions, you can tailor your designs and functionality to different platforms. To ensure only certain Android or iOS functions are called, simply wrap them with a check such as 'if (Platform.OS === ‘ios’)'.

Example: modal.android.js and modal.ios.js

Incorrect responses such as “I’ve never implemented a splash screen” could lead to suboptimal user experiences. Typically, having a splash screen is the way to go!

Libraries:

react-native-splash-screen

React-native-boot-splash

Techniques:

Create an .xib file for ios, use the xcode editor or something

pngs or xml

On first startup, show a png or screen designed at startup

It is important before showing (using rn-splash screen or another technique) the splash screen doesn’t flash white

Libraries

@react-native-community/netinfo

Techniques

Ensure that users can’t take any actions which require an internet connection if they aren't connected - add an event listener to validate their network status and display a suitable message in the case of no connectivity.

The answer to this question is opinion based, focusing on the rationale behind why they use a specific library.

Depending on the library chosen, some solutions could be enhanced by leveraging Redux instead

https://reactnavigation.org/docs/params/

For React Navigation, something like this

navigation.navigate('Details', {

itemId: 86,

otherParam: 'anything you want here',

‍});

React Navigation, and libraries modeled on native navigation principles, keep screens mounted while users navigate. This can lead to complications due to the discrepancies between React lifecycle methods such as componentWillMount and componentWIllUnmount.

https://reactnavigation.org/docs/navigation-lifecycle/

Snapshots: Not a total answer, snapshots don't test user interaction features.

Enzyme: It is a way to interact with the rendered component.

- Follow Up: What are the limitations of utilizing enzyme with React Native?

- Enzyme can to shallow mount component

- Based on React version Enzyme requires adaptor libraries.

Spies: By leveraging spies and Enzyme's render functionality, we can conduct efficient testing of interaction-based operations.

Integration Testing: Testing components connected to Redux with mock state/storage.

By using SafeAreaView or a library helper like iphone-x-helper

It is important that components such as snackbar positions consider the notch

Multiple answers:

Check xcode/android studio logs

Use react native debugger

Log out variables

Logcat

etc

InteractionManager.runAfterInteractions

Multiple answers:

Get the device size using Device API and create styles based on pixel size

pixelDensity API

React-native-responsive

Other libraries

KeyboardAvoidingView or another library to save input above the keyboard

‍https://assets-global.website-files.com/5d9bc5d562ffc2869b470941/5e013c6d193e334919d6e371_logo-fsl-light-gradient.svg}} />

Images in React Native need a width and height

Multiple answers, but the main one is using Flatlist and lazily loading elements.