Brooke  Giles

Brooke Giles

1554184539

How to use Props in React?

#reactjs

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Buddha Community

John David

1554184904

If you are new to React, you must have noticed the term props all across the tutorials and the code snippets that you come across. So what exactly are props and how do you use them correctly?

Props is short for Properties. In React, props can be passed to a component, and they should not be changed within a component.

_Props _cannot be changed within a component. Props are immutable.
Keep in mind that in React, the data flow is unidirectional from parent to the child. Irrespective of whether you declare your component as a _class _or a _function, _the _props _should not be modified.

Conversation Between Components

Let’s visualize a conversation between the components in React to see if we can get some clarity around props.

Parent Component 1: “Hey there child component, I have some props that I want to send your way! You can use them to render, and you can pass them on to your children too! Remember you cannot change the props that I send you.”

Child Component 1: “Thanks for sending the props my way. I am going to render myself and will use the props that you sent me without changing them. I am going to send the props to my child as well.”

Child Component 2: “Hey thanks for sending me the props that I need, I am going to use that to render myself.”

Alright, you get the idea. The data flows unidirectionally and the _props _are passed down the chain, but none of the children can modify the props.

Now you may ask me, what if I wanted to modify the properties within my component? For that purpose you can use the _state _in React. State works differently. _State _in React is internal to a component and can be modified within the component. We will learn about _state _in depth in another blog post.

Passing Props

export default class Heading extends React.Component {
  render() {
    return (
      <div>
        <p>{this.props.message}</p>
      </div>
    );
  }
}
Heading.propTypes = {
  message: PropTypes.string.isRequired
};

In this example above, we have defined an ES6 class which is the Heading component. This component renders a message. Observe here, that the message is given to the _Heading_component as a prop.

Now the _Heading_component can be rendered within any page or component with different messages. The point of using _prop _here is to reuse the code. Hence, the same _Heading_component can be used across the web app, with different _message _text passed each time as props.

The caller

export default class PageOne extends React.Component {
  render() {
    return (
      <div>
        <Heading message={"Custom Heading for Screen One"} />
      </div>
    );
  }
}

This is an example of how the _Heading _component can be called with props. In this example, the message is sent to the _Heading _component as a _prop _from the _PageOne _component.

**Note: **Keep in mind, that within the _Heading _component, the message prop cannot be changed. It is used only for rendering purposes and cannot be changed.

Okay, I get it but what are PropTypes?

React supports data validation through PropTypes. It is React’s in-built type-checker.

You can define components without PropTypes. But, without _PropTypes _or some form of type checking, we run into the risk of passing in a wrong data type to a component, which could cause a crash or some unexpected outcome in your application.

Now, let’s take a look at our _Heading _component from the previous example, and add PropTypes to it. We already had a _PropType _for the _message prop, _and we can add on to it.

import PropTypes from 'prop-types'

export default class Heading extends React.Component {

  render() {
    // ....
  }
}

Heading.propTypes = {
  message: PropTypes.string.isRequired,
  content: PropTypes.array.isRequired,
  onPress: PropTypes.func.isRequired,
  size: PropTypes.number.isRequired,
  styles: PropTypes.object.isRequired,
  isReady: PropTypes.bool.isRequired
}

As you can see from the example above, there are different types of _PropTypes _that we can add to our component. Strings, array, function, number, bool and so on.

What is isRequired and when do I use it?

As the name suggests, _isRequired _tells React that the particular _prop _is required by the component. Anytime the component is called it needs to be passed the _props _that are marked as isRequired. This ensures that we don’t accidentally miss certain _props _while calling components.

When we forget to pass the required _props _to a component, React throws an error in the development console.This helps in catching missing props during development phase.

What are defaultProps ?

Default values can be assigned to the props using defaultProps. When a component does not receive it’s props, then it resorts to the _defaultProps _that has been assigned.

Take a look further at the code snippet below that shows how we have added _defaultProps _to our _Heading _component.

// Default values for props
Heading.defaultProps = {
  message: 'Sample Default Text',
  content: [],
  size: 0,
  onPress: () => {},
  isReady: false
} 

It is not necessary to assign defaultProps if you have marked your props as required. You can use either one to be safe.

_Props _cannot be changed within a component. Props are immutable.
It is interesting to note that the type-checking using PropTypes happens after the defaultProps are assigned. So it type checks the default values assigned to the props as well. This is great!

Learn More

React - The Complete Guide (incl Hooks, React Router, Redux)

Modern React with Redux [2019 Update]

React Native - The Practical Guide

MERN Stack Front To Back: Full Stack React, Redux & Node.js

Full-Stack Web Apps with Meteor and React

React Hooks

Learn React.js for Beginners

React Hooks Tutorial for Beginners: Getting Started With React Hooks

Build Mobile-Friendly Web Apps with React Native Web

Build Progressive Web Apps with React

*Originally published at *https://programmingwithmosh.com

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

What are hooks in React JS? - INFO AT ONE

In this article, you will learn what are hooks in React JS? and when to use react hooks? React JS is developed by Facebook in the year 2013. There are many students and the new developers who have confusion between react and hooks in react. Well, it is not different, react is a programming language and hooks is a function which is used in react programming language.
Read More:- https://infoatone.com/what-are-hooks-in-react-js/

#react #hooks in react #react hooks example #react js projects for beginners #what are hooks in react js? #when to use react hooks

Props In React JS

Let’s take an example if you want to print your family members’ details that is the name, age, and profession, etc. Now, one way is you make one div for your info than another div for your mother, father, etc. It will look so clumsy something like this, a lot of div’s are used in the below example.

<div>
  <div>
     <p> name is manu </p>
     <span> age is 22 </span>
  </div>
  <div>
     <p> name is abc</p>
     <span> age is 27 </span>
  </div>
  <div>
     <p> name is xyz</p>
     <span> age is 25</span>
  </div>
<div>

So, in place of a big structure what we can do is make one common structure and then pass information in some way that we don’t have to create so many div’s. Here, comes the need for props in React JS.

#coding #props #react-for-begineers #basic-react #react-course #react

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

Aria Barnes

Aria Barnes

1627031571

React 18: Things You Need To Know About React JS Latest Version

The most awaited version of React 18 is finally out now. Its team has finally revealed the alpha version of React 18 and its plan, though the official launch is still pending. This time the team has tried something and released the plan first to know their user feedback because the last version of React 17 was not that much appreciated among developers.

According to Front-end Frameworks SurveyReact JS has ranked top in the list of most loved frameworks. Thus, the developer communities expect a bit higher from the framework, so they are less appreciative of the previous launch.
ReactJS stats.pngSo, this time React 18 will be a blast. For beginners, the team is working on a new approach. They have called a panel of experts, library authors, educators, and developers to take part in a working group. Initially, it will be a small group.

I am not a part of this release but following the team on their GitHub discussion group. After gathering the information from there, I can say that they have planned much better this time.

React 17 was not able to meet the developer's community. The focus was all primarily centered on making it easier to upgrade React itself. React 18 release will be the opposite. It has a lot of features for react developers.

Read more here: React 18: Things You Need To Know About React JS Latest Version

#hire react js developers #hire react js developers india #react developers india #react js developer #react developer #hire react developers