React useEffect Hook Made Simple

The React useEffect Hook helps you manage side-effects in functional React components. It also makes this task much easier than it used to be. In this tutorial you will learn about what useEffect hook is and how it works. You will also learn how to use it in your React applications.

Introduction to React useEffect hook

If you are familiar with React class components you know there are lifecycle methods available to use. You can use these methods to execute code at a specific moment you need. You can execute your code only when on component’s initial render. You can also execute it on very re-render of the component, or if only some data change.

These lifecycle methods, along with other features of class components, don’t work with functions. These methods don’t exist in their scope or environment. React hooks made it possible to bring many of these features from classes to functional components so you can use them here as well.

The React useEffect hook is a hook that brings the functionality of lifecycle methods to functional components. To make this easier, you can think about the useEffect hook as componentDidMountcomponentDidUpdate and componentWillUnmount lifecycle methods in one package.

That said, there are some differences between useEffect hook and lifecycle method. One difference is that useEffect hook runs after render. It runs after the first render, and also after every next update. It doesn’t run before it. This makes it easy to execute any code right after a component is rendered.

Another difference is that, by default, useEffect hook runs after every render. Fortunately, there is a way to prevent this behavior. When you use the useEffect hook, there is an option you can use to say when you want the useEffect hook to run. The hook will than run only under correct conditions and ignore others.

Another useful feature of useEffect hook is that it can also clean up after itself. This cleanup happens automatically before the hook is executed again. One example when cleanup can be handy is removing attached event listeners when you “change” page in your React application.

#reactjs #react #javascript #web-development

What is GEEK

Buddha Community

React useEffect Hook Made Simple
Autumn  Blick

Autumn Blick


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:-

#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


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

Hayden Slater


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

Karine  Crooks

Karine Crooks


Imitating react life-cycle methods with useEffect hook

It’s been a while since React v16.8 has been released. One of the most important features that was added to React with this release was the mighty hooks. With hooks you can turn the dumb state-less components to smart state-full components. Hooks are incredible but they for sure have changed the way we as developers need to think about the components. One thing I have seen a lot of developers struggle with is the useEffect hook. This one hook alone can somewhat replace the good old life cycle methods that were accessible with class-full components. This article of mine is an attempt at imitating some of the life-cycle methods with useEffect hook and hopefully give you an idea of how to use it accordingly

#useeffect #react-hook #react #react-native