Shany  Jenkins

Shany Jenkins

1615102920

How to Understand the Difference Between Function & Class Components in React

Using components in React with a better understanding of how they affect your App’s Performance has always been a confusing topic, and developers end up having a bulky code base that gets harder to manage through time. So, the major answer that you will hear that Class Components provide access to more features like (state), but with Hooks that’s not valid anymore.

You must have heard about one of them having better performance, but performance depends on what the code is doing rather than choosing a class or function. The performance is almost the same and can make differences using various optimization techniques.

Function Components

Consider A Component. Let’s take an example using a simple component that simulates a network request with setTimeout and shows a confirmation alert. If props.user is ‘Mohit’ it will simply show ‘Followed Mohit’ after 3 seconds.

In the example above you can use arrows or function declaration both work the same way.

Implementing the above example in class:

Oftentimes people mistakenly look at both the same way, but there is a difference between their implications. To observe the difference you can open the code sandbox I have created for a better understanding.

Open the code sandbox given above and run the code, now try these steps to measure the difference.

Click on the follow button. (function or class you can choose any of it)

Change the selected profile before 3 seconds pass.Now read the text alert.

You will notice when we click on the follow button (using a function component) and then switch to a different profile, it shows the previous user name instead of what we selected later 3 seconds pass. But when we press the follow button (using a class component), it shows the newly selected user name every time. You will getter a better understanding by running the sandbox on your own.

In this example, if you press the follow button on ‘Mohit’s’ profile and then change the selected user you are still going to see Mohit in the alert dialogue box in case of function component. And in the case of the class component, you will notice the switched profile name in the alert dialogue box.

As you can see, the first behavior is totally what we claim to be correct for us, as my component shouldn’t get confused about who I followed!.

#javascript #we #react #react-native #coding

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Buddha Community

How to Understand the Difference Between Function & Class Components in React
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

Vincent Lab

Vincent Lab

1605017502

The Difference Between Regular Functions and Arrow Functions in JavaScript

Other then the syntactical differences. The main difference is the way the this keyword behaves? In an arrow function, the this keyword remains the same throughout the life-cycle of the function and is always bound to the value of this in the closest non-arrow parent function. Arrow functions can never be constructor functions so they can never be invoked with the new keyword. And they can never have duplicate named parameters like a regular function not using strict mode.

Here are a few code examples to show you some of the differences
this.name = "Bob";

const person = {
name: “Jon”,

<span style="color: #008000">// Regular function</span>
func1: <span style="color: #0000ff">function</span> () {
    console.log(<span style="color: #0000ff">this</span>);
},

<span style="color: #008000">// Arrow function</span>
func2: () =&gt; {
    console.log(<span style="color: #0000ff">this</span>);
}

}

person.func1(); // Call the Regular function
// Output: {name:“Jon”, func1:[Function: func1], func2:[Function: func2]}

person.func2(); // Call the Arrow function
// Output: {name:“Bob”}

The new keyword with an arrow function
const person = (name) => console.log("Your name is " + name);
const bob = new person("Bob");
// Uncaught TypeError: person is not a constructor

If you want to see a visual presentation on the differences, then you can see the video below:

#arrow functions #javascript #regular functions #arrow functions vs normal functions #difference between functions and arrow functions

Shany  Jenkins

Shany Jenkins

1613712180

All Lifecycles in Class Components and Similar in Functional Components

Hi, today I’m going to explain the whole lifecycle of the class component also the same in functional components.

What you will learn after reading this article:

  • Execution of lifecycles in Class Components and Functional Components from the beginning to the end

  • How to implement Class Components lifecycles in Functional Components

  • Proper use of lifecycles in the component according to different modes

  • Lifecycle differences in Class Component and Functional Component

  • Very practical tips about where to call the components and their impact on the implementation of lifecycles

  • And other important and practical cases …

So let’s get started.

At first, we want to answer the question, what is the lifecycle of a component?

The lifecycle of a component in virtually all phases of its implementation from zero to one hundred until the component is fully rendered.

Each phase is suitable for a specific operation and events occur in it. So you should use the right life cycle in your component according to your needs, otherwise, it will cause errors and problems in your program.

So now that we understand these things, we are about on to introducing and explaining lifecycles.

The lifecycles of React components are divided into the following 3 sections, each of which will be described below:

1. Mounting: In this step, your initial states and data are initialized

2. Updating: In the update section, you can access your states and data, and you can perform update operations on it

3. Unmounting: And in the last section you can write the operations you want to do before unmounting of a component, such as clearing a SetInterval

#react-lifecycle #react #class-component #reactjs

Mathew Rini

1615544450

How to Select and Hire the Best React JS and React Native Developers?

Since March 2020 reached 556 million monthly downloads have increased, It shows that React JS has been steadily growing. React.js also provides a desirable amount of pliancy and efficiency for developing innovative solutions with interactive user interfaces. It’s no surprise that an increasing number of businesses are adopting this technology. How do you select and recruit React.js developers who will propel your project forward? How much does a React developer make? We’ll bring you here all the details you need.

What is React.js?

Facebook built and maintains React.js, an open-source JavaScript library for designing development tools. React.js is used to create single-page applications (SPAs) that can be used in conjunction with React Native to develop native cross-platform apps.

React vs React Native

  • React Native is a platform that uses a collection of mobile-specific components provided by the React kit, while React.js is a JavaScript-based library.
  • React.js and React Native have similar syntax and workflows, but their implementation is quite different.
  • React Native is designed to create native mobile apps that are distinct from those created in Objective-C or Java. React, on the other hand, can be used to develop web apps, hybrid and mobile & desktop applications.
  • React Native, in essence, takes the same conceptual UI cornerstones as standard iOS and Android apps and assembles them using React.js syntax to create a rich mobile experience.

What is the Average React Developer Salary?

In the United States, the average React developer salary is $94,205 a year, or $30-$48 per hour, This is one of the highest among JavaScript developers. The starting salary for junior React.js developers is $60,510 per year, rising to $112,480 for senior roles.

* React.js Developer Salary by Country

  • United States- $120,000
  • Canada - $110,000
  • United Kingdom - $71,820
  • The Netherlands $49,095
  • Spain - $35,423.00
  • France - $44,284
  • Ukraine - $28,990
  • India - $9,843
  • Sweden - $55,173
  • Singapore - $43,801

In context of software developer wage rates, the United States continues to lead. In high-tech cities like San Francisco and New York, average React developer salaries will hit $98K and $114per year, overall.

However, the need for React.js and React Native developer is outpacing local labour markets. As a result, many businesses have difficulty locating and recruiting them locally.

It’s no surprise that for US and European companies looking for professional and budget engineers, offshore regions like India are becoming especially interesting. This area has a large number of app development companies, a good rate with quality, and a good pool of React.js front-end developers.

As per Linkedin, the country’s IT industry employs over a million React specialists. Furthermore, for the same or less money than hiring a React.js programmer locally, you may recruit someone with much expertise and a broader technical stack.

How to Hire React.js Developers?

  • Conduct thorough candidate research, including portfolios and areas of expertise.
  • Before you sit down with your interviewing panel, do some homework.
  • Examine the final outcome and hire the ideal candidate.

Why is React.js Popular?

React is a very strong framework. React.js makes use of a powerful synchronization method known as Virtual DOM, which compares the current page architecture to the expected page architecture and updates the appropriate components as long as the user input.

React is scalable. it utilises a single language, For server-client side, and mobile platform.

React is steady.React.js is completely adaptable, which means it seldom, if ever, updates the user interface. This enables legacy projects to be updated to the most new edition of React.js without having to change the codebase or make a few small changes.

React is adaptable. It can be conveniently paired with various state administrators (e.g., Redux, Flux, Alt or Reflux) and can be used to implement a number of architectural patterns.

Is there a market for React.js programmers?
The need for React.js developers is rising at an unparalleled rate. React.js is currently used by over one million websites around the world. React is used by Fortune 400+ businesses and popular companies such as Facebook, Twitter, Glassdoor and Cloudflare.

Final thoughts:

As you’ve seen, locating and Hire React js Developer and Hire React Native developer is a difficult challenge. You will have less challenges selecting the correct fit for your projects if you identify growing offshore locations (e.g. India) and take into consideration the details above.

If you want to make this process easier, You can visit our website for more, or else to write a email, we’ll help you to finding top rated React.js and React Native developers easier and with strives to create this operation

#hire-react-js-developer #hire-react-native-developer #react #react-native #react-js #hire-react-js-programmer

Shany  Jenkins

Shany Jenkins

1615102920

How to Understand the Difference Between Function & Class Components in React

Using components in React with a better understanding of how they affect your App’s Performance has always been a confusing topic, and developers end up having a bulky code base that gets harder to manage through time. So, the major answer that you will hear that Class Components provide access to more features like (state), but with Hooks that’s not valid anymore.

You must have heard about one of them having better performance, but performance depends on what the code is doing rather than choosing a class or function. The performance is almost the same and can make differences using various optimization techniques.

Function Components

Consider A Component. Let’s take an example using a simple component that simulates a network request with setTimeout and shows a confirmation alert. If props.user is ‘Mohit’ it will simply show ‘Followed Mohit’ after 3 seconds.

In the example above you can use arrows or function declaration both work the same way.

Implementing the above example in class:

Oftentimes people mistakenly look at both the same way, but there is a difference between their implications. To observe the difference you can open the code sandbox I have created for a better understanding.

Open the code sandbox given above and run the code, now try these steps to measure the difference.

Click on the follow button. (function or class you can choose any of it)

Change the selected profile before 3 seconds pass.Now read the text alert.

You will notice when we click on the follow button (using a function component) and then switch to a different profile, it shows the previous user name instead of what we selected later 3 seconds pass. But when we press the follow button (using a class component), it shows the newly selected user name every time. You will getter a better understanding by running the sandbox on your own.

In this example, if you press the follow button on ‘Mohit’s’ profile and then change the selected user you are still going to see Mohit in the alert dialogue box in case of function component. And in the case of the class component, you will notice the switched profile name in the alert dialogue box.

As you can see, the first behavior is totally what we claim to be correct for us, as my component shouldn’t get confused about who I followed!.

#javascript #we #react #react-native #coding