Jeremy  Reilly

Jeremy Reilly

1604078820

React Tips — Dispatch and Navigate, useCallback, and Cleanup

React is a popular library for creating web apps and mobile apps.

In this article, we’ll look at some tips for writing better React apps.

React.useState does not Reload State from Props

React.useState doesn’t reload state from props.

It can only set the initial state.

If we need to update the state as props change, then we need to use the useEffect hook.

For instance, we can write:

function Avatar({ username }) {
  const [name, setName] = React.useState(username);

  React.useEffect(() => {
    setName(name);
  }, [username])
  return <img src={`${name}.png`}/>
}

We get the username prop .

And we set it as the initial value of the name state with useState .

Then we use the useEffect hook to watch for changes in the name value.

We watch it for changes, then call setName to set the name with the latest value of username as the name ‘s new value.

Then we can use name in the JSX we render.

#javascript #software-development #web-development #technology #programming #react native

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React Tips — Dispatch and Navigate, useCallback, and Cleanup
Autumn  Blick

Autumn Blick

1598839687

How native is React Native? | React Native vs Native App Development

If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?

In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.

A brief introduction to React Native

Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.

React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.

Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.

Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.

The popularity of React Native comes from its advantages. Some of its advantages are as follows:

  • Performance: It delivers optimal performance.
  • Cross-platform development: You can develop both Android and iOS apps with it. The reuse of code expedites development and reduces costs.
  • UI design: React Native enables you to design simple and responsive UI for your mobile app.
  • 3rd party plugins: This framework supports 3rd party plugins.
  • Developer community: A vibrant community of developers support React Native.

Why React Native is fundamentally different from earlier hybrid frameworks

Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.

React Native is very close to native. Consider the following aspects as described on the React Native website:

  • Access to many native platforms features: The primitives of React Native render to native platform UI. This means that your React Native app will use many native platform APIs as native apps would do.
  • Near-native user experience: React Native provides several native components, and these are platform agnostic.
  • The ease of accessing native APIs: React Native uses a declarative UI paradigm. This enables React Native to interact easily with native platform APIs since React Native wraps existing native code.

Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.

#android app #frontend #ios app #mobile app development #benefits of react native #is react native good for mobile app development #native vs #pros and cons of react native #react mobile development #react native development #react native experience #react native framework #react native ios vs android #react native pros and cons #react native vs android #react native vs native #react native vs native performance #react vs native #why react native #why use react native

Ray  Patel

Ray Patel

1619518440

top 30 Python Tips and Tricks for Beginners

Welcome to my Blog , In this article, you are going to learn the top 10 python tips and tricks.

1) swap two numbers.

2) Reversing a string in Python.

3) Create a single string from all the elements in list.

4) Chaining Of Comparison Operators.

5) Print The File Path Of Imported Modules.

6) Return Multiple Values From Functions.

7) Find The Most Frequent Value In A List.

8) Check The Memory Usage Of An Object.

#python #python hacks tricks #python learning tips #python programming tricks #python tips #python tips and tricks #python tips and tricks advanced #python tips and tricks for beginners #python tips tricks and techniques #python tutorial #tips and tricks in python #tips to learn python #top 30 python tips and tricks for beginners

Aubrey  Price

Aubrey Price

1589722410

Build a simple React Native Pokemon app with React-Navigation

As we start learning new technologies we want to start building something or work on a simple project to get a better understanding of the technology. So, let’s build this simple app.
For this app, we will be using PokeApi to get our pokemon data, and also we will be using Hooks. I am using pokemondb for pokemon sprites. It’s just a personal preference you can use whatever you want.

#react-native #react-native-app #react-navigation #react-native-development #react

Willis  Mills

Willis Mills

1625218560

Combining Navigators #2 | React Navigation V3 | React Native Tutorial

#2 Learn how to combine the Switch Navigator, Drawer Navigator, Stack Navigator and Tab Navigator to create a robust navigation flow

New To React Native?
React Native Foundation + Firebase + Redux :
https://www.udemy.com/course/react-native-foundation/?referralCode=5AFD942A55973C3D60CB

Custom Snippets : https://github.com/nathvarun/Custom-React-Native-Snippets-Unsure-Programmer

https://github.com/nathvarun/react-navigation-v3/tree/part2

Donate : paypal.me/UNSUREPROGRAMMERIND
Twitter https://twitter.com/nathvarun
Instagram https://www.instagram.com/nathvarun25
Facebook https://www.facebook.com/nathvarun

#react native #react navigation v3 #combining navigators #react #tutorial

Trinity  Kub

Trinity Kub

1594769040

Bottom Tab View inside Navigation Drawer with React Navigation V5

Bottom Tab View + Navigation Drawer

This is an example of Bottom Tab View inside Navigation Drawer / Sidebar with React Navigation in React Native. We will use react-navigation to make a navigation drawer and Tab in this example. I hope you have already seen our post on React Native Navigation Drawer because in this post we are just extending the last post to show the Bottom Tab View inside the Navigation Drawer.

In this example, we have a navigation drawer with 3 screens in the navigation menu and a Bottom Tab on the first screen of the Navigation Drawer. When we open Screen1 the Bottom Tab will be visible and on the other options, this Bottom Tab will be invisible.

To Create a Drawer Navigator

<NavigationContainer>
  <Drawer.Navigator
    drawerContentOptions={{
      activeTintColor: '#e91e63',
      itemStyle: { marginVertical: 5 },
    }}>
    <Drawer.Screen
      name="HomeScreenStack"
      options={{ drawerLabel: 'Home Screen Option' }}
      component={HomeScreenStack} />
    <Drawer.Screen
      name="SettingScreenStack"
      options={{ drawerLabel: 'Setting Screen Option' }}
      component={SettingScreenStack} />
  </Drawer.Navigator>
</NavigationContainer>

To Create Bottom Tab Navigator

<Tab.Navigator
  initialRouteName="HomeScreen"
  tabBarOptions={{
    activeTintColor: 'tomato',
    inactiveTintColor: 'gray',
    style: {
      backgroundColor: '#e0e0e0',
    },
    labelStyle: {
      textAlign: 'center',
      fontSize: 16
    },
  }}>
  <Tab.Screen
    name="HomeScreen"
    component={HomeScreen}
    options={{
      tabBarLabel: 'Home Screen',
      // tabBarIcon: ({ color, size }) => (
      //   <MaterialCommunityIcons name="home" color={color} size={size} />
      // ),
    }}  />
  <Tab.Screen
    name="ExploreScreen"
    component={ExploreScreen}
    options={{
      tabBarLabel: 'Explore Screen',
      // tabBarIcon: ({ color, size }) => (
      //   <MaterialCommunityIcons name="settings" color={color} size={size} />
      // ),
    }} />
</Tab.Navigator>

In this example, we will make a Tab Navigator inside a Drawer Navigator so let’s get started.

To Make a React Native App

Getting started with React Native will help you to know more about the way you can make a React Native project. We are going to use react-native init to make our React Native App. Assuming that you have node installed, you can use npm to install the react-native-cli command line utility. Open the terminal and go to the workspace and run

npm install -g react-native-cli

Run the following commands to create a new React Native project

react-native init ProjectName

If you want to start a new project with a specific React Native version, you can use the --version argument:

react-native init ProjectName --version X.XX.X

react-native init ProjectName --version react-native@next


This will make a project structure with an index file named App.js in your project directory.

#bottom navigation #drawer navigation #react #react navigation