Fannie  Zemlak

Fannie Zemlak

1603022400

Top React Hooks — Shared State and Visibility

Hooks contains our logic code in our React app.

We can create our own hooks and use hooks provided by other people.

In this article, we’ll look at some useful React hooks.

@rooks/use-visibility-sensor

The @rooks/use-visibility-sensor package lets us detect the visibility of our component.

To install it, we can run:

npm install --save @rooks/use-visibility-sensor

Then we can use it by writing:

import React from "react";
import useVisibilitySensor from "@rooks/use-visibility-sensor";

export default function App() {
  const ref = React.useRef(null);
  const { isVisible, visibilityRect } = useVisibilitySensor(ref, {
    intervalCheck: false,
    scrollCheck: true,
    resizeCheck: true
  });
  return (
    <div ref={ref}>
      <p>{isVisible ? "Visible" : "Not Visible"}</p>
      <p>{JSON.stringify(visibilityRect)}</p>
    </div>
  );
}

We use the useVisibilitySensor with a ref that’s passed to the element we want to check the visibility for.

The 2nd argument is an object with various options.

intervalCheck is an integer or boolean that let us whether we check for visibility periodically.

If it’s a number then it’s the interval between each check in milliseconds.

scrollCheck is a boolean to determine whether to check for scroll behavior or not.

resizeCheck lets us check for resize if it’s true .

There’re other options for throttling and more.

Resynced

The Resynced library is a library that lets us share states between multiple components.

To install it, we can run:

yarn add resynced

Then we can use it by writing:

import React from "react";
import { createSynced } from "resynced";

const initialState = 0;
const [useSyncedState] = createSynced(initialState);
const Counter = () => {
  const [count] = useSyncedState();
  return (
    <div>
      <p> {count}</p>
    </div>
  );
};
export default function App() {
  const [_, setCount] = useSyncedState();
  return (
    <div>
      <button onClick={() => setCount(s => s + 1)}>increment</button>
      <Counter />
    </div>
  );
}

We call createSynced with th initial state to return an array with the useSyncedState hook.

Then we use the returned hook in our components.

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

What is GEEK

Buddha Community

Top React Hooks — Shared State and Visibility
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

Top 10 React Native App Development Companies in USA

React Native is the most popular dynamic framework that provides the opportunity for Android & iOS users to download and use your product. Finding a good React Native development company is incredibly challenging. Use our list as your go-to resource for React Native app development Companies in USA.

List of Top-Rated React Native Mobile App Development Companies in USA:

  1. AppClues Infotech
  2. WebClues Infotech
  3. AppClues Studio
  4. WebClues Global
  5. Data EximIT
  6. Apptunix
  7. BHW Group
  8. Willow Tree:
  9. MindGrub
  10. Prismetric

A Brief about the company details mentioned below:

1. AppClues Infotech
As a React Native Mobile App Development Company in USA, AppClues Infotech offers user-centered mobile app development for iOS & Android. Since their founding in 2014, their React Native developers create beautiful mobile apps.

They have a robust react native app development team that has high knowledge and excellent strength of developing any type of mobile app. They have successfully delivered 450+ mobile apps as per client requirements and functionalities.
Website: https://www.appcluesinfotech.com/

2. WebClues Infotech
WebClues Infotech is the Top-Notch React Native mobile app development company in USA & offering exceptional service worldwide. Since their founding in 2014, they have completed 950+ web & mobile apps projects on time.

They have the best team of developers who has an excellent knowledge of developing the most secure, robust & Powerful React Native Mobile Apps. From start-ups to enterprise organizations, WebClues Infotech provides top-notch React Native App solutions that meet the needs of their clients.
Website: https://www.webcluesinfotech.com/

3. AppClues Studio
AppClues Studio is one of the top React Native mobile app development company in USA and offers the best service worldwide at an affordable price. They have a robust & comprehensive team of React Native App developers who has high strength & extensive knowledge of developing any type of mobile apps.
Website: https://www.appcluesstudio.com/

4. WebClues Global
WebClues Global is one of the best React Native Mobile App Development Company in USA. They provide low-cost & fast React Native Development Services and their React Native App Developers have a high capability of serving projects on more than one platform.

Since their founding in 2014, they have successfully delivered 721+ mobile app projects accurately. They offer versatile React Native App development technology solutions to their clients at an affordable price.
Website: https://www.webcluesglobal.com/

5. Data EximIT
Hire expert React Native app developer from top React Native app development company in USA. Data EximIT is providing high-quality and innovative React Native application development services and support for your next projects. The company has been in the market for more than 8 years and has already gained the trust of 553+ clients and completed 1250+ projects around the globe.

They have a large pool of React Native App developers who can create scalable, full-fledged, and appealing mobile apps to meet the highest industry standards.
Website: https://www.dataeximit.com/

6. Apptunix
Apptunix is the best React Native App Development Company in the USA. It was established in 2013 and vast experience in developing React Native apps. After developing various successful React Native Mobile Apps, the company believes that this technology helps them incorporate advanced features in mobile apps without influencing the user experience.
Website: https://www.apptunix.com/

7. BHW Group
BHW Group is a Top-Notch React Native Mobile App Development Company in the USA. The company has 13+ years of experience in providing qualitative app development services to clients worldwide. They have a compressive pool of React Native App developers who can create scalable, full-fledged, and creative mobile apps to meet the highest industry standards.
Website: https://thebhwgroup.com/

8. Willow Tree:
Willow Tree is the Top-Notch React Native Mobile App Development Company in the USA & offering exceptional React Native service. They have the best team of developers who has an excellent knowledge of developing the most secure, robust & Powerful React Native Mobile Apps. From start-ups to enterprise organizations, Willow Tree has top-notch React Native App solutions that meet the needs of their clients.
Website: https://willowtreeapps.com/

9. MindGrub
MindGrub is a leading React Native Mobile App Development Company in the USA. Along with React Native, the company also works on other emerging technologies like robotics, augmented & virtual reality. The Company has excellent strength and the best developers team for any type of React Native mobile apps. They offer versatile React Native App development technology solutions to their clients.
Website: https://www.mindgrub.com/

10. Prismetric
Prismetric is the premium React Native Mobile App Development Company in the USA. They provide fast React Native Development Services and their React Native App Developers have a high capability of serving projects on various platforms. They focus on developing customized solutions for specific business requirements. Being a popular name in the React Native development market, Prismetric has accumulated a specialty in offering these services.
Website: https://www.prismetric.com/

#top rated react native app development companies in usa #top 10 react native app development companies in usa #top react native app development companies in usa #react native app development technologies #react native app development #hire top react native app developers in usa

The Ugly Side of React Hooks

In this post, I will share my own point of view about React Hooks, and as the title of this post implies, I am not a big fan.

Let’s break down the motivation for ditching classes in favor of hooks, as described in the official React’s docs.

Motivation #1: Classes are confusing

we’ve found that classes can be a large barrier to learning React. You have to understand how "this"_ works in JavaScript, which is very different from how it works in most languages. You have to remember to bind the event handlers. Without unstable syntax proposals, the code is very verbose […] The distinction between function and class components in React and when to use each one leads to disagreements even between experienced React developers._

Ok, I can agree that

thiscould be a bit confusing when you are just starting your way in Javascript, but arrow functions solve the confusion, and calling a_stage 3_feature that is already being supported out of the box by Typescript, an “unstable syntax proposal”, is just pure demagoguery. React team is referring to theclass fieldsyntax, a syntax that is already being vastly used and will probably soon be officially supported

class Foo extends React.Component {
  onPress = () => {
    console.log(this.props.someProp);
  }

  render() {
    return <Button onPress={this.onPress} />
  }
}

As you can see, by using a class field arrow function, you don’t need to bind anything in the constructor, and

this will always point to the correct context.

And if classes are confusing, what can we say about the new hooked functions? A hooked function is not a regular function, because it has state, it has a weird looking

this(aka_useRef_), and it can have multiple instances. But it is definitely not a class, it is something in between, and from now on I will refer to it as aFunclass. So, are those Funclasses going to be easier for human and machines? I am not sure about machines, but I really don’t think that Funclasses are conceptually easier to understand than classes. Classes are a well known and thought out concept, and every developer is familiar with the concept ofthis, even if in javascript it’s a bit different. Funclasses on the other hand, are a new concept, and a pretty weird one. They feel much more magical, and they rely too much on conventions instead of a strict syntax. You have to follow somestrict and weird rules, you need to be careful of where you put your code, and there are many pitfalls. Telling me to avoid putting a hook inside anifstatement, because the internal mechanism of hooks is based on call order, is just insane! I would expect something like this from a half baked POC library, not from a well known library like React. Be also prepared for some awful naming like useRef (a fancy name forthis),useEffect ,useMemo,useImperativeHandle(say whatt??) and more.

The syntax of classes was specifically invented in order to deal with the concept of multiple instances and the concept of an instance scope (the exact purpose of

this ). Funclasses are just a weird way of achieving the same goal, using the wrong puzzle pieces. Many people are confusing Funclasses with functional programming, but Funclasses are actually just classes in disguise. A class is a concept, not a syntax.

Oh, and about the last note:

The distinction between function and class components in React and when to use each one leads to disagreements even between experienced React developers

Until now, the distinction was pretty clear- if you needed a state or lifecycle methods, you used a class, otherwise it doesn’t really matter if you used a function or class. Personally, I liked the idea that when I stumbled upon a function component, I could immediately know that this is a “dumb component” without a state. Sadly, with the introduction of Funclasses, this is not the situation anymore.

#react #react-hooks #javascript #reactjs #react-native #react-hook #rethinking-programming #hackernoon-top-story

Slava Birch

Slava Birch

1621742803

Reuse React hooks in state sharing

Hi guys, today I’m going to talk about how to complete your code with one hook that will complete the puzzle!

The release of React 16.8 was a gift and a blessing, hooks were a great tool for managing the state of components. And having met with amicability, the community began to create new hooks based on standard ones for asynchronous operations, for interacting with external logic, and many many others.

Hooks let you use state and other React features without writing a class.
You can also build your own Hooks to share reusable stateful logic between components.

But (I’m sure) it became a chagrin for everyone that hooks can only store data at the component level. And therefore components can share their state only with children.

And that’s the problem.

We have enough hooks to describe any logic, but there is no way to use their state together between a group of unrelated components.

You can see that Recoil, Redux, MobX, and the standard React hooks do the same thing - managing reactive state.
But why do we need to use in our applications a way of describing logic on hooks in components and on an external application state management system?

I suggest you try the simplest way to share the state described in hooks with other unrelated components on the page.

The useBetween hook.

And this is just one hook, with the only one call argument - a custom hook, the result of which will be shared by everyone.

For example, let’s describe a custom hook that supplies a hash from the browser’s address bar. The hook subscribes to changes to the browser hash through the window event.

// router.shared.ts
import { useState, useCallback, useEffect } from "react";
import { useBetween } from "use-between";

const useRouter = () => {
  const [hash, setHash] = useState("");

  const syncHash = useCallback(() => {
    setHash(window.location.hash);
  }, [setHash]);

  useEffect(() => {
    syncHash();
    window.addEventListener("hashchange", syncHash);
    return () => {
      window.removeEventListener("hashchange", syncHash);
    };
  }, [syncHash]);

  return {
    hash
  };
};

export const useSharedRouter = () => useBetween(useRouter);

In the last line of the example, we used a call to useBetween passing a custom useRouter hook as an argument, and thus created a new useSharedRouter hook - a shared router for all components that will use it.

const Hash = () => {
  const { hash } = useSharedRouter();
  return (
    <p>Location hash: {hash}</p>
  )
}

export const App = () => (
  <>
    <Hash />
    <Hash />
    <Hash />

    <a href="#hash-1">hash-1</a>
    <a href="#hash-2">hash-2</a>
  </>
)

Edit Counter with useBetween

In this example, the router will be created once and will be used for all the Hash components. Every time the hash of the navigation bar address changes, all components using useSharedRouter will be updated!

We used the standard React hooks that are familiar and understandable to everyone to create a shared state between any components using just one external hook useBetween.

Everything will be installed simply npm i use-between and you can use and enjoy, and for my taste, the easiest way to share the state in React!

If you like this idea and would like to use it, please join to us. It will be your first contribution!

use-between github repository and documentation.

Enjoy and Happy Coding!

#react #react-hooks #state-sharing #use-between #javascript #webdev