Rachel Cole

Rachel Cole

1593156690

Props vs State in React

Ever since we started using React to rebuild our UI at uberVU (now Hootsuite) the #1 developer question has probably been:

What’s the exact difference between props and state?

It’s fairly easy to understand how they work—especially when seen in context—but it’s also a bit difficult to grasp them conceptually. It’s confusing at first because they both have abstract terms and their values look the same, but they also have very different roles.

Context

The main responsibility of a Component is to translate raw data into rich HTML. With that in mind, the props and the state together constitute the raw data that the HTML output derives from.

You could say props + state is the input data for the render() function of a Component, so we need to zoom in and see what each data type represents and where does it come from.

Because we also use Cosmos where props can contain an initial state, getting this straight is crucial.

Common ground

Before separating props and state, let’s also identify where they overlap.

  • Both props and state are plain JS objects
  • Both props and state changes trigger a render update
  • Both props and state are deterministic. If your Component generates different outputs for the same combination of props and state then you’re doing something wrong.

Does this go inside props or state?

tl;dr: If a Component needs to alter one of its attributes at some point in time, that attribute should be part of its state, otherwise it should just be a prop for that Component.

props

props (short for properties) are a Component’s configuration, its options if you may. They are received from above and immutable as far as the Component receiving them is concerned.

A Component cannot change its props, but it is responsible for putting together the props of its child Components.

state

The state starts with a default value when a Component mounts and then suffers from mutations in time (mostly generated from user events). It’s a serializable* representation of one point in time—a snapshot.

A Component manages its own state internally, but—besides setting an initial state—has no business fiddling with the state of its children. You could say the state is private.

  • We didn’t say props are also serializable because it’s pretty common to pass down callback functions through props.

Changing props and state

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Should this Component have state?

state is optional. Since state increases complexity and reduces predictability, a Component without state is preferable. Even though you clearly can’t do without state in an interactive app, you should avoid having too many Stateful Components.

Component types

  • Stateless Component — Only props, no state. There’s not much going on besides the render() function and all their logic revolves around the props they receive. This makes them very easy to follow (and test for that matter). We sometimes call these dumb-as-f*ck Components (which turns out to be the only way to misuse the F-word in the English language).
  • Stateful Component — Both props and state. We also call these state managers. They are in charge of client-server communication (XHR, web sockets, etc.), processing data and responding to user events. These sort of logistics should be encapsulated in a moderate number of Stateful Components, while all visualization and formatting logic should move downstream into as many Stateless Components as possible.

#react #javascript #developer

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Props vs State 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

Devil  Moya

Devil Moya

1597820235

Props vs. State in React

I had been working with React and Redux on a project for a while before being asked what the difference between props and state were in React. I realized at that point that while I felt comfortable working with both, I couldn’t clearly articulate the differences between them. So, I’ve set out to both clarify the differences for myself and perhaps help others do the same.

The general overview is that props are variables passed from a parent component to a child component with a read-only intent. State, on the other hand, is comprised of variables that are initialized and updated directly by the component. State rather than props is used whenever a component will be updating the data.

#react #props-and-state #state

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

Eliseo  Kutch

Eliseo Kutch

1625119020

React JS Tutorial - 4 - States and Props

In this video, we are discussing about how to create states in class and functional component and also we look at how to pass props from one component to another.

#react #react js #states #props

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