How to compare Old Values and New Values on React useEffect Hook?

Sometimes we want to compare the old and new value of a state change.

In this article, we’ll look at how to get th previous value of a state to the new one.

Create Our Own Hook

We can get the old value of a state with our own hook.

For instance, we can write:

import { useEffect, useRef, useState } from "react";

const usePrevious = (value) => {
  const ref = useRef();
  useEffect(() => {
    ref.current = value;
  });
  return ref.current;
};
export default function App() {
  const [count, setCount] = useState(0);
  const prevCount = usePrevious(count);
  useEffect(() => {
    console.log(prevCount, count);
  }, [prevCount, count]);
  return (
    <div className="App">
      <button onClick={() => setCount((c) => c + 1)}>increment</button>
      <p>{count}</p>
    </div>
  );
}

We create the usePrevious hook with the value parameter which is state we want to get the previous value from,

In the hook, we create a ref with the useRef hook to create a non-reactive property.

Then we add the useEffect hook with a callback that sets the ref.current to value to set the previous value.

And we return ref.current which has the previous value.

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

What is GEEK

Buddha Community

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

Class-less Components in React

While coding this week, I had to convert one of my class components in React to a functional component.

Why would I need to do that? After all, the parent component sees the two types of components as identical. Sure, functional components can be shorter, require less boilerplate, and maybe even perform better. But that’s not why I needed to do it. I was using an npm package that had React hooks and hooks are for functional components only. React Hooks, added in React 16.8, allow functional components to manage state and replace lifecycle methods. To use the hook I needed I had to convert my class components to a functional.

Here are the steps I followed to change my class component to a functional component:

#react-hook-useeffect #useeffect #react-hook #react-hook-usestate #react

Which is the best React Native app development company in New York?

React Native, an open-source JavaScript mobile app dynamic framework that provides the opportunity for Android and iOS users to download and use your product.

In this digital era, all users require prompt information and most of the businesses want to give a better mobile app experience to their users. There are multiple mobile app development frameworks available and React Native is the best one of that.

Advantages of React Native Mobile App Development:

• A mobile app can be developed with the help of Web technology which enables any web developer to easily enhance their skills and create React apps.
• React Native supports in building cross-platform mobile apps.
• It saves time and cost to develop mobile apps on many platforms.
• Building blocks that are used in iOS and Android apps are also used while building React Native based apps which means that React Native is a mobile framework that compiles app components for native mobile applications in JavaScript.
• A React Native app ensures speed and agility for the mobile apps with responsiveness and a great native app-based user experience.

Best React Native App Development Company in New York:

AppClues Infotech is the Best React Native Mobile App Development Company in New York that focus on delivering a feature-rich mobile app. Since established in 2014, they have successfully delivered 750+ mobile app development projects to their esteemed clients. They are developing a robust and high-quality mobile app using the latest methodology.

They have the best dedicated React native mobile app developers team who has high experience and the greatest strength of developing any types of React Native App Development. They are the one-stop solution for your any type of React Native App project.

React Native App Development Services by AppClues Infotech

• Cross-Platform Development
• MVP
• Server-Side APIs
• App Integration
• User Preferences
• Reusable Components

Easy Steps for Hiring Dedicated React Native App Developers from AppClues Infotech:

1. Post Your Project Requirements

2. Discuss Project Details

3. Choose The Right Developers

4. Get Started

Why Choose AppClues Infotech for React Native App Development?

• Best Designer & Developers Team
• Quality Assurance
• Client Satisfaction
• On-Time Delivery
• Multiple Service at 0ne-Stop
• Support & Maintenance
• Competitive Price

Businesses have started considering React Native development for developing cross-platform mobile apps, as the platform offers many advantages which also include considerable cost and time savings. Additionally, it is an Open Source platform that also allows the integration of third-party plugins. I found this company based on so many hard research like top websites like IT Firms, Good Firms, Clutch, Glassdoor & many more. This company provides an excellent solution for the React Native app development. I hope this company extremely helpful for your future dream mobile app projects.

Discuss your app idea with AppClues Infotech Team or get a free quote from them.

#react native app development new york #react native mobile app development new york #top react native app development company new york #best react native app development services new york #custom react native app development company new york

Validating React Forms With React-Hook-Form

Validating inputs is very often required. For example, when you want to make sure two passwords inputs are the same, an email input should in fact be an email or that the input is not too long. This is can be easily done using React Hook From. In this article, I will show you how.

Required Fields

The most simple, yet very common, validation is to make sure that an input component contains input from the user. React Hook Form basic concept is to register input tags to the form by passing register() to the tag’s ref attribute. As we can see here:

#react-native #react #react-hook-form #react-hook