Jacob Banks

Jacob Banks

1584460200

React Hello World Tutorial - ReactJS MicroBytes 2020

In this tutorial we’ll build a basic Hello World application in React. ReactJS is amazing and easy to use. Stay tuned for more React MicroBytes 2020.

#reactjs #javascript #webdev

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React Hello World Tutorial - ReactJS MicroBytes 2020
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

Brain  Crist

Brain Crist

1594753020

Citrix Bugs Allow Unauthenticated Code Injection, Data Theft

Multiple vulnerabilities in the Citrix Application Delivery Controller (ADC) and Gateway would allow code injection, information disclosure and denial of service, the networking vendor announced Tuesday. Four of the bugs are exploitable by an unauthenticated, remote attacker.

The Citrix products (formerly known as NetScaler ADC and Gateway) are used for application-aware traffic management and secure remote access, respectively, and are installed in at least 80,000 companies in 158 countries, according to a December assessment from Positive Technologies.

Other flaws announced Tuesday also affect Citrix SD-WAN WANOP appliances, models 4000-WO, 4100-WO, 5000-WO and 5100-WO.

Attacks on the management interface of the products could result in system compromise by an unauthenticated user on the management network; or system compromise through cross-site scripting (XSS). Attackers could also create a download link for the device which, if downloaded and then executed by an unauthenticated user on the management network, could result in the compromise of a local computer.

“Customers who have configured their systems in accordance with Citrix recommendations [i.e., to have this interface separated from the network and protected by a firewall] have significantly reduced their risk from attacks to the management interface,” according to the vendor.

Threat actors could also mount attacks on Virtual IPs (VIPs). VIPs, among other things, are used to provide users with a unique IP address for communicating with network resources for applications that do not allow multiple connections or users from the same IP address.

The VIP attacks include denial of service against either the Gateway or Authentication virtual servers by an unauthenticated user; or remote port scanning of the internal network by an authenticated Citrix Gateway user.

“Attackers can only discern whether a TLS connection is possible with the port and cannot communicate further with the end devices,” according to the critical Citrix advisory. “Customers who have not enabled either the Gateway or Authentication virtual servers are not at risk from attacks that are applicable to those servers. Other virtual servers e.g. load balancing and content switching virtual servers are not affected by these issues.”

A final vulnerability has been found in Citrix Gateway Plug-in for Linux that would allow a local logged-on user of a Linux system with that plug-in installed to elevate their privileges to an administrator account on that computer, the company said.

#vulnerabilities #adc #citrix #code injection #critical advisory #cve-2020-8187 #cve-2020-8190 #cve-2020-8191 #cve-2020-8193 #cve-2020-8194 #cve-2020-8195 #cve-2020-8196 #cve-2020-8197 #cve-2020-8198 #cve-2020-8199 #denial of service #gateway #information disclosure #patches #security advisory #security bugs

Karine  Crooks

Karine Crooks

1595571840

React Hello World: Your First React App

The best way to learn React is to re-create Hello World but for React. Let’s learn all there is to know about building a simple Hello World app in React!

What We’re Building

This tutorial will thoroughly explain everything there is to know about creating a new React app in the quickest way possible. If you’re someone who wants to learn how to spin up a brand new React app, then this tutorial is for you.

I’ve summarized the most important details for each step under each of the headings so you can spend less reading and more coding.

Generate a New React App Using Create React App

  • Create React App (CRA) is a tool to create a blank React app using a single terminal command.
  • CRA is maintained by the core React team.

Configuring a _modern _React app from scratch can be quite intricate, and requires a fair amount of research and tinkering with build tools such as Webpack, or compilers like Babel.

Who has time for that? It’s 2019, so we want to spend more time coding and less time configuring!

Therefore, the best way to do that in the React world is to use the absolutely fantastic Create React App tool.

Open up your terminal and run the following command:

Terminal

npx create-react-app hello-world

This generates all of the files, folders, and libraries we need, as well as automatically configuring all of the pieces together so that we can jump right into writing React components!

The success screen after scaffolding a new React app with Create React App. Let’s get hacking some React components together!

Once Create React App has finished downloading all of the required packages, modules and scripts, it will configure webpack and you’ll end up with a new folder named after what we decided to call our React project. In our case, hello-world.

Open up the hello-world directory in your favorite IDE and navigate to it in your terminal. To do that, run the following command to jump in to our Hello World React app’s directory.

Terminal

cd hello-world

#tutorials #beginner react tutorials #react #react app #javascript

React js Projects 2020

Are you looking for some new react js to expand your skills or to explore the possibilities of react js, have a look at these projects :

Project 1: Next.js React GraphQL Express Apollo Boilerplate

If you are a react js developer who uses GraphQL, Next.js, Express, and Apollo regularly ( well I do ) then, give this boilerplate a go.

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Fig.1. Next.js React GraphQL Express Apollo Boilerplate

**Features: **Next.js, React, GraphQL, Express, React Apollo, Typescript JsonWebToken, TSLint, Husky, Bluebird, Cors

Github Link

Project 2: React Dashboard — “isomorphic” admin dashboard template

If you are looking for a react dashboard template to use it for your own website, take a look at this:

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#react-js-tutorials #reactjs #react-js-development #react-hook #react

ReactJS Tutorial for Beginners

Welcome to part-5 of the series. You can find part-4 here. We will learn about state in this part, but let’s first understand the difference between state and props.

props vs state

Since, react have two important concepts. One been props and other been state, they are compared a lot. And also differentiated a lot. Below diagram show the difference between them.

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props vs state

state in code

As, per the above diagram state is managed within a component. So, we will first create a state variable. Create a new file Counter.js inside the component folder. It is a class based component and we have the class constructor in it. The state variable is declared with this.state inside a constructor and is an object. We can put any numbers of key-value pair in it.

We are declaring count inside the state variable, with the initial value of 0. Now, inside our render() method we access it by this.state.count.

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Counter.js

Now, in localhost it will show the initial value.

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localhost

Now, whenever we want to change the value of state, we do it thorough setState method. We have added a button and a onClick event to it. Next, we are calling **incrementCount **function.

On important thing to notice is that at line 9, we are using the bind. This is done because the this keyword will throw error, if we don’t give it.

Inside the **incrementCount **function, we are calling the this.setState and increasing the count value.

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#react-js-development #react #react-js-tutorials #reactjs-development #react-js-training