Skip to content
+91-7795206615
|
info@habilelabs.io

  • Home
  • About
  • Services
    • Custom Application Development
    • UI/UX Designing
    • Web Application Development
    • Offshore Product Services
    • Technical Outsourcing
    • ERP Services
  • Company
    • Careers
    • Case Studies
  • Specialization
    • Frontend Frameworks
      • Angular
      • ReactJS
      • VueJS
      • HTML / CSS
      • Javascript /Jquery
      • Bootstrap
      • Material design
    • Backend Frameworks
      • NodeJS
      • Meteor
      • GraphQL
      • Loopback
      • Salesforce
      • Spring Boot
      • Odoo
      • Laravel
    • Database / ORM
      • MySQL
      • PostgreSQL
      • Oracle
      • MongoDB
      • Google Firebase
      • Mongoose
      • Sequelize
      • Hibernate / JPA
    • Languages
      • Java Script
      • Dot Net
      • Java
      • Python
      • C / C++
      • PHP
      • AI / ML
      • Type Script
    • Mobile Frameworks
      • Ionic
      • Native Script
      • Native Android App
      • Native iOS App
      • Google Flutter
      • React Native
  • Blog
  • Hire Us

React Hooks – Why Better than Classes?

Categories

  • Angular
  • Business Strategies
  • Cloud Services
  • CRM
  • Design Pattern
  • E-commerce
  • ERP Applications
  • Javascript
  • Meteor
  • Mobile development
  • Mongo DB
  • Node JS
  • Odoo
  • Our Partners
  • PHP
  • React
  • SAAS
  • Salesforce
  • SAP
  • Selenium
  • Tech stack Migration
  • Testing
  • UI-UX Design
  • VAPT
  • Visualforce
  • Web Development
  • Web Security

Categories

  • Angular
  • Business Strategies
  • Cloud Services
  • CRM
  • Design Pattern
  • E-commerce
  • ERP Applications
  • Javascript
  • Meteor
  • Mobile development
  • Mongo DB
  • Node JS
  • Odoo
  • Our Partners
  • PHP
  • React
  • SAAS
  • Salesforce
  • SAP
  • Selenium
  • Tech stack Migration
  • Testing
  • UI-UX Design
  • VAPT
  • Visualforce
  • Web Development
  • Web Security
react hooks why better than classes

React is a JavaScript library, developed and maintained by Facebook, used to build user interfaces. It is a component-based architecture in which one can use two approaches, Class/Stateful Component, and Functional/Stateless Component. This architecture increases the reusability of the code.

In Class Components, we have all the lifecycle methods and can say like a game with complete control in our hands, while the same is not true in the case of Functional Components and we don’t have control over it. Therefore, in order to take control, React.js gives us the power of Hooks for the functional components. So, let’s start playing with this power of new controls.

React Classes & Hooks

In React version <=16.7, if we are creating any component with state or which can access the react life cycle methods, it has to be a class component. We can create a class component by extending React.Component class of React and using render() function which will return HTML.

Hooks were introduced from >=React 16.8 versions. Basically, Hooks are the functions that provide us to write stateful logic, which was only possible in the Class component, but with the help of hooks, we can write the same logic separately and reuse that logic.

Overview About React Hooks

Hooks are functions that let you “hook into” React state and lifecycle features from functional components. Hooks don’t work inside classes, instead, let you use React without classes.

By using hooks, we can remove the nesting, only left is our render function which is of pure rendering logic. We have some pre-built hooks like- useState, useEffect, and useContext-

  • useEffect stops it from being spread across three different lifecycle hooks. We can use the same hooks useEffect when we need to update something after every render, code won’t become increasingly nested.
  • useState allows us to use the stateful logic in functional components. In the above example, we are using useState to maintain the key-pressed-count state.

Use Cases:

Though hooks have some benefits over classes, it does not address all the features of classes. We can still use classes, let’s see in the example below-

There are some downsides as well, let’s have a look at them-

  • If you need to use the same key pressed logic in some other component than we need to write the same code again and again.
  • If you have more behavior like this code gets complicated.

Let’s review some of the ways we can use them-

Mixins –

Using mixins we can group all lifecycle like-

Mixins allow you to mix some additional functionality into React components. Refactoring needs to be easy. These mixed-in behaviors need to be more obvious that they don’t belong to the component. They shouldn’t be using the internals of the component. ES6 classes do not support mixins to React. Instead, we have a HOC concept.

Mixins are not deprecated from React, you can still use mixins by using React.createClass to create React components.

Higher-Order Components (HOC) –

The HOC is a technique of re-using react components all over again. HOC is a function that accepts a component and returns a new component. HOC commonly used by third-party libraries like Redux connect.

We can use the Higher-Order component by creating a container that passes in props. Let’s try the composition –

Now, we have all the benefits of MIXINS. We have a <KeyRender/> component that is not tightly coupled to the subscription behaviour. Do we always need to make a new component??

Rules to Remember-

While using hooks, there are some rules you need to remember-

  • Hooks always call at the top level of the render function.

We can’t make conditional hooks and can’t reorder them on every render. If you want conditional effects, you should split your hooks into other components.

  • Hooks can use only in React Function Components, and in Custom Hooks.
  • There are not hook primitives for componentDidCatch
  • Avoid using lifecycle methods like componentDidMount, componentDidUpdate, componentWillUnmount.

While using hooks, avoid lifecycle methods, instead, you can use hooks like useEffect or you can also create your own custom hooks.

Wrap-Up

Using hooks will solve many of the problems which we often experience while using React Classes, but there are still some cases like we cannot access lifecycle methods while using hooks.
Again, this guide was not meant to convince you to use hooks or completely refactor the Classes to Hooks.
Just a friendly reminder that there are other options as well, available out there to experiment with!
Hooks don’t replace your knowledge of React concepts. If you are really interested in learning more about hooks, try to apply this concept to the new projects, you are assigned with.
You should check out the lessons one must learn while working with React.js.

Thanks!

Posted byDeepti BansalFebruary 14, 2020February 14, 2020Posted inMobile development, React, Web DevelopmentTags: React, React Hooks, react js, React JS Components

Post navigation


:

Leave a comment

Cancel reply

Your email address will not be published. Required fields are marked *

Recent Posts

  • Data Fetching in Next.js – Pre-rendering Types

    Data Fetching in Next.js – Pre-rendering Types

  • Useful Chrome Extensions for Testing

    Useful Chrome Extensions for Testing

  • Node.js – Blocking & Non-Blocking and Asynchronous Operations

    Node.js – Blocking & Non-Blocking and Asynchronous Operations

  • Reporting for JMeter – Listeners & Result Analysis

    Reporting for JMeter – Listeners & Result Analysis

  • How to Solve Pagination and Filter Issue in Sequelize?

    How to Solve Pagination and Filter Issue in Sequelize?

  • Chart.js – How to Use it with Angular.js

    Chart.js – How to Use it with Angular.js

Talk to our experts now

Have a project or looking for development team? Contact us.

Get a quote

About Us

Habilelabs Private Limited is the ISO 9001:2015 certified IT company, which has marked its flagship in 20+ countries with 100+ projects successfully

Company

  • About Us
  • Blog
  • Careers
  • Hire Us
  • Privacy Policy

Contact Us

  • +91-9828247415
  • +91-9887992695
  • info@habilelabs.io

Follow Us

Office

  • Habilelabs Private Limited
    4th Floor, I.G.M. School Campus,
    Sec-93 Agarwal Farm, Mansarovar,
    Jaipur, Rajasthan India
    Pin:302020