React Component Lifecycle Methods With React Hooks

For working with any tech you must know the lifecycle. When writing React components, we need access to lifecycle events to handle a variety of side effects: like fetching data on mount, changing props when the component updates, cleaning up before the component unmounts, etc.


React Lifecycle Method Explained

First, let’s take a look at how it’s been done traditionally. As you probably know, each React component has a life cycle, which consists of three phases:

  • Mounting, that is putting inserting elements into the DOM.
  • Updating, which involves methods for updating components in the DOM.
  • Unmounting, that is removing a component from the DOM.

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Image provided by the author.

Each phase has its own methods, which make it easier to perform typical operations on the components. With class-based components, React developers directly extend from the React.Component in order to access the methods.

Until React 16.8, the most common solution for handling lifecycle events required ES6 class-based components. In other words, if our code was already written using functional React components, then we first would have to rewrite those components as classes that extend React.Component with a dedicated render function. Only then would it be possible to access the three most common lifecycle methods: componentDidMountcomponentDidUpdate, and componentWillUnmount. (For the purposes of this article, we will only cover these three lifecycle methods. Since other lifecycle methods will be deprecated in React 17, and, in the interim, require the use of the UNSAFE_ prefix, we will not cover them in this post.) The following diagram illustrates when these methods are invoked in the context of the component lifecycle:

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React Component Lifecycle Methods With React Hooks
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

Mark Mara

Mark Mara

1607399166

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

Using React Hooks instead of lifecycle methods

How to replace React lifecycle methods with React Hooks in functional components? First, let’s see to lifecycle methods diagram.

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You don’t need the constructor method in functional components. Use the [useState](https://reactjs.org/docs/hooks-state.html)Hook to initialize the state.

The common React component lifecycle methods arecomponentDidMount,``componentDidUpdate and componentWillUnmount. For all cases we should use the [useEffect](https://reactjs.org/docs/hooks-effect.html)Hook. Let’s see an example for details.

//componentDidMount and componentDidUpdate. An effect re-runs every render

	useEffect(() => {
	    // to do smth...
	})

	//componentDidMount. An effect runs only on mount

	useEffect(() => {
	    // to do smth...
	}, [])
view raw
demo.tsx hosted with ❤ by GitHub

For componentWillUnmount method, we should add the return statement to the useEffect Hook.

useEffect(() => {
	  // to do smth...

	  return () => {
	    // to do smth else when a component is unmounted...
	  }
	})
view raw
demo.tsx hosted with ❤ by GitHub

#react-lifecycle #react #react-hook

Hayden Slater

1599277908

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