React Native

React Native

React Native is a JavaScript framework for writing real, natively rendering mobile applications for iOS and Android. ... React Native also exposes JavaScript interfaces for platform APIs, so your React Native apps can access platform features like the phone camera, or the user's location.
Sarai  Thompson

Sarai Thompson


Top 50 React Native Interview Questions and Answers

We’ll cover the top 50 React Native interview questions. This guide includes questions and answers.

React is one of the most popular JavaScript front-end frameworks on the market today, and its popularity continues to grow. It’s estimated that over 8,000 companies use this JavaScript framework, including big names like Facebook, Instagram, Airbnb, and more. Many companies are looking for talented React developers.

Cracking your React Native interview is essential to landing one of these roles. To help you prepare, we’ve gathered the top 50 React Native interview questions. This guide includes questions and answers. Let’s get started!

#react-native #interview-questions #react

Top 50 React Native Interview Questions and Answers

How to Build a To-Do List App with React Native

🌟 In this session we want to create an application together from the beginning, so that we can finally upload it to the store. We will create a To-Do list and use almost everything we have learned in this series.

💻 Project Source Code in GitHub:

⏱️ Timestamps:
React Native Tutorial #33 (2021) - To-Do List App part 1

  • 00:00 Intro
  • 00:38 Splash Screen
  • 04:37 Tab Navigator in the Nested Navigation
  • 09:00 Float Add Button
  • 10:54 Task Details Screen
  • 15:05 Redux Structure
  • 17:05 Getting Tasks List from Async Storage
  • 19:11 Saving New Task in Local Storage
  • 22:43 FlatList Component for Display the Tasks
  • 26:54 Getting Task Details
  • 27:57 Update the Task

#react-native #react

How to Build a To-Do List App with React Native

Ajay Kumbhar


Why Does React Native App Development Cost is Lower

Companies and organizations are in stiff competition when it comes to building mobile app development. Companies and organisations are looking forward for new ways to create a genuine innovative apps that help the customers and consumers in a wide variety of ways. gone are the days of native mobile app development where mobile app development companies could only develop a single app for a single platform. Now is the age for Cross-platform app development where you the user is able to accomplish multiple things using a single code base for the app. There are several Technologies that allows us to do just this. React-native has been exceptional in providing app development companies with a wide variety of Technologies which seems to ease they are job of app development and the consumers are kept engaged with such kind of innovative and new apps

So what react-native provides and has that enables such kind of benefits to app development companies. Here in this article we will have a look at why does react native app development cost lower and how it is capable of helping app development companies deal with their day-to-day challenges of mobile app development.

Let us see how this react native Framework can significantly reduce your smartphone app development costs:

Cross Platform Compatibility which saves valuable development time:

React native provide developers and designers with the facility of using cross-platform compatibility nature of app development. The cross-platform nature of react-native enables developers and designers to create multiple apps for multiple platforms. In the case of react native, app developers are able to create Apps for Android and iOS platforms using just a single code base formula. With this advantage app developers how only need to manage a single code base in order to make changes to the app when it comes to app development using react native.

Hot Reload feature to enhance developers efficiency:

One more major benefit that react native provides to app developers and designers is the use of hot reload feature in app development. With the use of hot reload feature react native greatly enhances as well as reduces the total time and effort that developers put in into developing apps for the masses.

Hot reload reduces the compilation time required for developers to compile their code and produce a new app every time. With this feature app developers can greatly reduce their time and efforts that they put in side app development as this enhances their productivity also.

Reusable components of React native:

Reusability of components is one of the most desirable think that can offer to App developers and designers. With the help of react native app developers and app designers do not have to quote the same thing again and again which greatly reduces the time and effort that they put for app development. With the means of libraries reusable components can be used to augment and amplifier features and functions provided by the app as well as provide the required features and functionality using app development.

Realtime Debugging for app development:

React to allows developers and designers to debug the app code on a real time basis which greatly improve the productivity and efficiency of react native app developers. With the use of Chromes developer tools, app developers can greatly debug their apps code on a real time basis almost instantly which causes them to find errors and bags as well as fix them on the spot.

Doing this react-native facilitates developers with real time testing features that enables them to thoroughly test their which improve their Quality Assurance activities as well.

Easy to integrate Readymade solutions and libraries:

One of the major and primary benefits that react native has allowed app developers and designers access to a wide range of libraries and functions. Using this vast range of libraries developers can easily implement common functionality into their apps which greatly reduces the development time in efforts and enables the use of reusable components pretty easily and efficiently when it comes to app development.

For every feature in functionality that you need to use there is a provided library component that is readily available for app developers to implement the required features and functionality into their apps. library greatly reduces app developers time which allows them to concentrate on other areas of app development

Lower UI Cost:

The app development interface is one of the most critical elements when it comes to app development and you just cannot compromise the UI development. As user interface plays a great aspect for app development, react native provide app developers and designers to focus on the user interface and User experience expect pretty easily and efficiently.

Doing this helps app developers bring some kind of uniformity into the app by quickly implementing design functionality and features which the app requires. React native greatly reduces app development and saves the time and efforts that app developers have which improve the user interface without the developers looking for third party APIs

Seamless Integration:

If you are a Startup or a normal company leading into app development, everybody wants to have a customer-centric approach that provides exclusive and innovative features to customer. Using react native you are empowered to do just that using minimum cost as well as efforts. developers and designers only need to collect the corporate login and components using third-party modules to achieve the required features and functionality.

React-native enables seamless integration of software components that provide the required functionality with the ease and efficiency that can be used by developers.

App maintenance is much easier:

When it comes to cross-platform app development, the maintenance of such apps are Plains easier and efficient. you do not have to release version update and concentrates on providing bug fixes and patches with each update. Cross-platform app development enables you to reach our consumers without them having to download your app and provide the required features and functionalities in an easy and efficient way possible

Conclusion: Due to the above uses and features, react native greatly reduces the cost of mobile app development. If you are looking to build you app using Native the you can Hire React Native Developer. Hope you like this article on Why Does React Native App Development Cost is Lower.

#react-native #mobile-apps #app-development #react

Why Does React Native App Development Cost is Lower

How to Build an Animated Loader in React Native

This tutorial will walk you through how to build an animated loader in React Native using a couple different libraries.

React Native is an amazing library for developers looking to build mobile apps with speed. It provides an efficient way of displaying information to the frontend. But before displaying API data, the application has to first inform the user that the data is on its way.

One way to do so is to leverage the power of animations. Thus, it can also give your UI a more vibrant feel.

For example, what do you think gives a better impression? Rendering a piece of text:

RN Animated Text Loader

Or using a vivid animation:

Vivid RN Loader

In the React Native world, a multitude of libraries exists to help you get up and running. In this guide, we will use lottie-react-native and react-native-animatable. This is because they are an absolute breeze to use and well maintained.

#react-native #react

How to Build an Animated Loader in React Native

Top 10+ Best React Native App Templates for Developers

React Native App Templates

React Native apps Templates are coded entirely in JavaScript so that it’s easier for React developers.

We’ll introduce you to 13 amazing professional app templates in react native which can jump start your app development.

These apps are made in React Native, so you can create both iOS and Android app from same source code.

1.MStore Pro - Complete React Native template for e-commerce

For those who own physical shops and developers, with MStore, you have variety ready-to-use E-commerce templates to create your mobile store application. If you had your online shops in WooCommerce, MStore supports you to convert your current websites to mobile store app easily. Your store mobile app will be found in both the App Store and Google Play Store.


View Demo More info / Download

2.BeoNews Pro - React Native mobile app for Wordpress

BeoNews is an app that does magic for your website by converting your Wordpress website into a mobile true native app with customized contents within a fillip.

What is “customized content”? BeoNews transfers exactly all contents with different formats that you created in Wordpress website into your mobile app without any coding skill and development time. To engage with customers on mobile, we need a mobile app. BeoNews maximizes your customers’ experience and usability through UX flow in both Android and iOs.


View Demo More info / Download

3.Felix Travel - mobile React Native travel app template

Felix Travel is a mobile React Native (version 0.63.2) app template for universal travel application or booking industry. The template supports many kinds of booking modules like hotel reservation, tour booking, car rental, flight booking, cruise booking, shuttle bus and event booking. Beside that, this template is also providing UI KIT for making a complete mobile application with a total 100+ sample screens and 40+ reusable React Native components. If your business idea is matching with among features in this application.


View Demo More info / Download

4.GoFit - Complete React Native Fitness App + Backend

Full Admin Panel source code


Demo Data SQL File

Android and iOS App source code


View Demo More info / Download

5.Food Delivery - React Native Template

Food Delivery is component based application template for React Native. Source code has been written in JavaScript and the final application can be built both for Android and iOS platforms.


View Demo More info / Download

6.RealFood Mobile | React Native Recipes & Community Food

RealFood is a powerful react native & mobile app with a modern UI/UX design, smart functions that will help you create an amazing cookbook or global recipes site & app. RealFood script works perfectly on mobile, tablet, and desktop, which can help you to create a professional mobile app as Recipes Listing, Fitness Diets, Community Food. RealFood it also allows users to upload their recipes and share them with other users. RealFood is highly customizable and super-easy to set up.


View Demo

More info / Download

7.SkiMontana React Native Tour App Theme/Template

Ski Montana is a React Native Live stream app specifically for Ski Montana which is compatible both in IOS and Android. This UI theme will provide exiting user experience with its look and code. Ski Montana allows user live stream their game , share experience and manage followers


View Demo More info / Download

8.Fitness Love - React Native App Template

Fitness Love – React Native App Template is a mobile app that combines technology and applied psychology with personal preferences to help people form habits that build towards healthier, happier lives.


View Demo

More info / Download

9.Doctor Plus - Patient React Native App Template

Doctor Plus for Paitent React Native App Template is a medical online service. You can ask a free question about any health issues and get free answers and instant help from top doctors on your phone. You can also find doctors in 100+ specialties and can pay for an online consult instantly by video, voice call or live chat with a primary care doctor 24/7 or book an online appointment.


View Demo

More info / Download

10.CarSpot – Dealership Classified React Native App

CarSpot is a react native app that gives you complete freedom to create an automotive dealership app and website. No Paid Plugins Needed, Everything Inside. CarSpot is a fully-featured and powerful automotive dealership website and apps specially designed for the automotive and car/bike/boats etc.


View Demo

More info / Download

11.Evora - Real Estate Complete Solution React Native App

Evora is a complete Real Estate Manager to easily start your online Estate Agency. It has a powerful admin panel for managing properties, users, posts, forms, pages, and much more. Evora is extremely optimized for giving customers the best user experience.


View Demo

More info / Download

12.Neoflix React Native Theme

Neoflix React Native Theme for any video streaming app. Give your video streaming app a different touch and make it more appealing to users.


More info / Download

13.React Native Social Dating App

Legendbae is a dating application with a firebase backend. It’s developed in React Native Framework. Which support iOS and Android devices.

Legendbae is different from another dating application. Legendbae is connected to two people. Legendbae have a seeker feature. On the seeker feature, you can send a seeker request to nearby users. First, you can send a request. after acceptance, you can chat & meet with your suggested location for tea dating, movies dating, etc.


More info / Download

#react-native #react #javascript

Top 10+ Best React Native App Templates for Developers

Debugging Your App with React Native Debugger

In this tutorial, you can learn how to use React Native Debugger to debug React Native apps in a few easy steps.

In this tutorial, we’ll show you how to use React Native Debugger to — you guessed it — debug React Native apps.

You might be wondering, why not use the default React Native debug tool? What makes React Native Debugger unique? Read on to learn the answers to these questions and see how React Native Debugger works.

  • Installing React Native Debugger
  • Connecting a React Native app to React Native Debugger
  • Features of React Native Debugger
    • UI Inspector
    • Debug Redux
    • Network Inspector
    • AsyncStorage management
    • Breakpoints

#react-native #react

Debugging Your App with React Native Debugger

How to Implement Box Shadows in React Native App on Android and iOS

Applying box shadows in a React Native app is not always straightforward. Learn to apply box shadows across the iOS and Android platforms.

Applying box shadows in a React Native app is not always straightforward. Because developers must build for both Android and iOS platforms, applying consistent box shadows with different platform-specific implementation processes can be tedious.

In this article, we will learn how to implement box shadows in a React Native app across the Android and iOS platforms.

  • Using React Native shadow props for iOS box shadows
  • Adding the styles.elevation prop for Android
  • React Native cross-platform box shadow
  • Applying a box shadow with react-native-drop-shadow
  • Using react-native-shadow-2

#react-native #react #ios #android

How to Implement Box Shadows in React Native App on Android and iOS

React Native Tutorial (2021) - Quiz#2 - Challenge Yourself

🌟 In this part, we want to challenge ourselves and take a test to review what we have learned so far.

⏱️ Timestamps:
React Native Tutorial (2021) - Quiz#2 - Challenge Yourself
00:00 Intro
00:37 Questions
04:24 Answers
Q1: b, Q2: c, Q3: a, Q4: a, Q5: c,
Q6: b, Q7: c, Q8: b, Q9: a, Q10: c,
Q11: c, Q12: a, Q13: b, Q14: b, Q15: c

#react-native #react

React Native Tutorial (2021) - Quiz#2 - Challenge Yourself

A Highly Customized Dropdown, Select, Picker Menu for React Native


react-native-select-dropdown is a highly customized dropdown | select | picker | menu for react native that works for andriod and iOS platforms.


Using npm

npm install react-native-select-dropdown

Using yarn

yarn add react-native-select-dropdown


Code provided in Examples folder.




import SelectDropdown from 'react-native-select-dropdown'
const countries = ["Egypt", "Canada", "Australia", "Ireland"]
	onSelect={(selectedItem, index) => {
		console.log(selectedItem, index)
	buttonTextAfterSelection={(selectedItem, index) => {
		// text represented after item is selected
		// if data array is an array of objects then return to render after item is selected
		return selectedItem
	rowTextForSelection={(item, index) => {
		// text represented for each item in dropdown
		// if data array is an array of objects then return to represent item in dropdown
		return item




array of data that will be represented in dropdown 'can be array of objects

Type Required
array Yes


callback function recieves selected item and its index in data array

Type Required
function Yes


default button text when no item is selected

Type Required
String No


callback function recieves selected item and its index, this function should return a string that will be represented in button after item is selected

Type Required
function Yes “unless you customized button using renderCustomizedButtonChild”


callback function recieves item and index for each row in dropdown, this function shoud return a string that will be represented in each row in dropdown

Type Required
function Yes “unless you customized button using renderCustomizedRowChild”


default selected item in dropdown ( check examples in Demo1)

Type Required
any No


default selected item index

Type Required
integer No


disable dropdown

Type Required
boolean No


style object for button

Type Required
object Yes


style object for button text

Type Required
object No


callback function recieves selected item and its index, this function should return a React component as a child for dropdown button buttonStyle should be used for parent button view style.

# check examples folder to make things clear

Type Required
function No


function that should return a React component for dropdown icon

Type Required
function No


dropdown icon position “left” || “right”

Type Required
string No


required to set true when statusbar is translucent (android only)

Type Required
boolean No


style object for dropdown view

Type Required
object No


style object for row

Type Required
object Yes


style object for row text

Type Required
object No


callback function recieves item and its index, this function should return React component as a child for customized row rowStyle should be used for parent row view style.

check examples folder to make things clear

Type Required
function No

Method Description
reset() Remove selection & reset it to display defaultButtonText check
openDropdown() Open the dropdown.
closeDropdown() Close the dropdown.

Download Details:

Author: AdelRedaa97
Download Link: Download The Source Code
Official Website:
License: MIT

#react-native #react

A Highly Customized Dropdown, Select, Picker Menu for React Native
Beth  Nabimanya

Beth Nabimanya


5 Reasons to Use Tailwind CSS with React Native

Tailwind CSS is an open-source utility-first CSS framework. It redefines the way you style applications by providing a variety of CSS classes.

Using Tailwind CSS, you can style your applications without a single custom class name or a stylesheet.

Furthermore, I found that it works exceptionally well with mobile applications based on React Native.

So, in this article, I’m going to discuss why Tailwind CSS is the best solution for React Native applications.

  • 1. Customized Packages for Better Integration
  • 2. Small Bundle Size in Production
  • 3. Improves Maintainability
  • 4. Consistent UI and Customizability
  • 5. Can Easily Keep the Application Up-to-Date

#react #tailwind-css #react-native #css #javascript

5 Reasons to Use Tailwind CSS with React Native

Archer Brown


Mobile App Development Agency in Germany | App Developers in Germany | Zazz

Businesses from all over the world have begun to move from the physical world of handing out flyers, publishing posters, and hanging posters to the virtual domain, offering a ludicrous range of products. And you too should. Zazz is helping companies here in Germany to adopt contemporary mobile solutions. With Zazz, you remain ahead in the game and we assure you that you are working with some of the great minds in the world.

Mobile App Development Company in Germany

#mobile-apps #android #ios #flutter #react-native #app

Mobile App Development Agency in Germany | App Developers in Germany | Zazz

A React Native Library for Building Maps with Mapbox Maps SDK

Mapbox Maps SDK for React Native

An unofficial React Native library for building maps with the Mapbox Maps SDK for iOS and Mapbox Maps SDK for Android

We also support MapLibre flavors of Mapbox SDKs now 🎉

Indoor Building Map Android

Indoor Building Map iOS



On Android we support from version 6 (API 23) upwards



git clone
cd maps


yarn add @react-native-mapbox-gl/maps


npm install @react-native-mapbox-gl/maps --save

Installation Guides

Getting Started

For more information, check out our Getting Started section

Adding a map

import React, { Component } from "react";
import { StyleSheet, View } from "react-native";
import MapboxGL from "@react-native-mapbox-gl/maps";


const styles = StyleSheet.create({
  page: {
    flex: 1,
    justifyContent: "center",
    alignItems: "center",
    backgroundColor: "#F5FCFF"
  container: {
    height: 300,
    width: 300,
    backgroundColor: "tomato"
  map: {
    flex: 1

export default class App extends Component {
  render() {
    return (
      <View style={}>
        <View style={styles.container}>
          <MapboxGL.MapView style={} />







Expo Support

This package is not available in the Expo Go app. Learn how you can use it with custom dev clients.

Testing with Jest

This library provides some mocks which are necessary for running tests.


"jest": {
  "preset": "react-native",
  "setupFilesAfterEnv": ["@react-native-mapbox-gl/maps/setup-jest"]

Developer Group

Have a question or need some help? Join our Gitter developer group!

Download Details:

Author: react-native-mapbox-gl
Download Link: Download The Source Code
Official Website:
License: MIT

#react-native #google-maps #react

A React Native Library for Building Maps with Mapbox Maps SDK

React Native for Desktop using React Native for Windows

Render all of your platform-specific UI elements on desktop from one JavaScript-based codebase using React Native for Windows.

As we know, React is a free and open-source JavaScript library written by Facebook to create highly dynamic web UIs. Facebook later created React Native for developing cross-platform native mobile apps by using React as the core interface for developers, which allowed them to build native mobile apps for Android and iOS with a single React syntax-based codebase.

React typically renders its component changes to DOM (Document Object Model), but it can also render components as HTML for server-side rendering (SSR) requirements. For React Native, there was Proton Native, which generated cross-platform desktop applications and let you render native UI elements with the Qt and wxWidgets UI toolkits, but which is no longer actively maintained.

While there is still an active fork of it, in this article, we’ll cover a more stable, actively maintained, and popular project: react-native-windows. This is Microsoft’s extension of React Native for Windows and macOS backends and makes it so that the same React Native-based frontend will natively render on Windows and macOS with platform-specific UI elements.

I will explain how you can develop Windows desktop applications using the react-native-windows project. We’ll also cover how your React Native syntax turns into a native desktop application with the framework’s internal modules.

#react-native #react #javascript #windows

React Native for Desktop using React Native for Windows
Eve  Klocko

Eve Klocko


TIKTOK Clone React Native Tutorial 2021 👨‍💻 - Firebase Authentication React Native and Expo (#2)

In this tiktok clone video we’ll be implementing the authentication system for this amazing project with firebase authentication, firebase firestore and firebase functions. We’ll also implement a good looking UI in react native with expo that looks similar to the real TikTok app.

🔵 Series Description 🔵

TIKTOK Clone React Native Tutorial 2021 👨‍💻

I’ll show you how you can do this in the simplest way and terms possible.

By the end of this series you’ll have learned how the big companies do it and will be able to do the same, you not only will be able to do this app, but you’ll be able to put what you learn into your very own projects!

In this series, we use React Native with Expo to quickly deploy the project. We use firebase for all our microservice needs like the auth system, database, storage, amongst others.

firebase, redux, react native, javascript, expo. In this series, we’ll use all of them and you’ll learn them by doing an iconic app.

Welcome to this Simcoder project and make a TikTok Clone!

🔵 Important Links 🔵

▷ Firebase -
▷ Firebase function -
▷ Expo -
▷ React Native -
▷ Redux -
▷ Android Studio -
▷ Visual Studio Code -

🔵 In This Video 🔵

TIKTOK Clone React Native Tutorial 2021 👨‍💻 - Firebase Authentication React Native and Expo (#2)

  • 0:00 Introduction
  • 1:00 Chapter 1 - Firebase Firestore Database Structure
  • 2:55 Chapter 2 - Implement Redux in React Native
  • 14:10 Chapter 3 - Auth Screen React Native UI
  • 54:50 Chapter 4 - Login and Register Action with Firebase Authentication and Redux
  • 01:03:20 Chapter 5 - Firebase Functions onUserCreate trigger function
  • 01:07:55 Conclusion

#react-native #react #firebase #authentication #security

TIKTOK Clone React Native Tutorial 2021 👨‍💻 - Firebase Authentication React Native and Expo (#2)
Rui  Silva

Rui Silva


React Native 0.65 | Libs para animações em RN | Reactotron para debug?

Rodrigo Gonçalves é quem estreia no comando do #PR de hoje! Reunimos as principais duvidas sobre React Native, aquelas que recebemos nos comentários do último PR, e colocamos nosso educador de frente para a câmera para responder tudo da melhor maneira.

Vamos falar sobre as melhores libs para animações no RN e quais os critérios usados na escolha de cada uma. Dúvidas sobre como configurar um CI CD para React Native com Expo Bare Workflow. Será que o Reactotron ainda é uma boa prática pra debug? E também vamos dar uma olhada na versão 0.65 do React Native.

Essa nova temporada do PR está completamente diferente, dessa vez queremos tirar dúvidas na prática e gerar uma conversa produtiva sobre assuntos que circulam no universo da programação.

Confira a grade completa de conteúdos do canal aqui:

Conecte-se a 200mil devs e avance para o próximo nível com a nossa plataforma:

Cadastre-se na nossa plataforma:

Junte-se a mais de 392mil devs em nossa comunidade no Discord:

Acompanhe a Rocketseat nas redes sociais:
Twitter: @rocketseat
Facebook: @rocketseat
Instagram: @rocketseat_oficial

Nos ouça também no Spotify:

  • Podcast Faladev
  • Podcast Alumni
  • Podcast Proxy

#react-native #react

React Native 0.65 | Libs para animações em RN | Reactotron para debug?