Earlier, class components were the only option to add states to components and manipulate the lifecycle. However, since the introduction of React Hooks, now we can add the same functionality to function components.
Come see how easy it is to build fast, accurate, and responsive web UIs using the React library. Even if you’ve never written Javascript before, React’s straightforward syntax can get you started with your UI project quickly. In this session, you’ll learn about React’s declarative syntax and state representation, explore some of the basic components that are used to build sophisticated UIs, and leave with a foundational application you can continue to build on.
Tutorial Videos: https://www.youtube.com/playlist?list=PLD8nQCAhR3tQ7KXnvIk_v_SLK-Fb2y_k_
Day 1 : Introduction to React, Babel and Webpack
Prerequisites of starting the workshop ( Basic understanding of Node & Express )
What is Virtual DOM?
What is React and why should we use it?
Install and set up React:
a-Using create-react-app
b-From scratch using Babel and Webpack. We will use Webpack Dev Server.
Day 2 : React Basic Concepts
Types of Components: Class-based and Functional based Components
Use of JSX
Parent, Child, and Nested Components
Difference between State and Props
Create and Handle Routes
Component Lifecycle Methods
Create a form and handling form inputs
Use of arrow functions and Spread Operator
Day 3: Advanced Concepts in React
Use of Refs
What are Higher Order Components( HOC )?
How to use HOC
Understanding Context in React
React and its component structure
● What are Hooks?
● React Hooks and their capabilities
● Migrating Your Existing Apps to React Hooks
● Combine Existing React Hooks into New Custom Hooks
● Benefits of using React Hooks
● Best Practices
A step towards the way you write the code in React application.In this presentation, I have given introduction about React hooks. Why we need it in our react applications and describe about the two most commonly used React Hooks API useState and useEffect. I also given the links of code snippets I added in these slides
The session will provide the knowledge about react page life cycle and how more precise actions or operations can be performed using react hooks concepts
Come see how easy it is to build fast, accurate, and responsive web UIs using the React library. Even if you’ve never written Javascript before, React’s straightforward syntax can get you started with your UI project quickly. In this session, you’ll learn about React’s declarative syntax and state representation, explore some of the basic components that are used to build sophisticated UIs, and leave with a foundational application you can continue to build on.
Tutorial Videos: https://www.youtube.com/playlist?list=PLD8nQCAhR3tQ7KXnvIk_v_SLK-Fb2y_k_
Day 1 : Introduction to React, Babel and Webpack
Prerequisites of starting the workshop ( Basic understanding of Node & Express )
What is Virtual DOM?
What is React and why should we use it?
Install and set up React:
a-Using create-react-app
b-From scratch using Babel and Webpack. We will use Webpack Dev Server.
Day 2 : React Basic Concepts
Types of Components: Class-based and Functional based Components
Use of JSX
Parent, Child, and Nested Components
Difference between State and Props
Create and Handle Routes
Component Lifecycle Methods
Create a form and handling form inputs
Use of arrow functions and Spread Operator
Day 3: Advanced Concepts in React
Use of Refs
What are Higher Order Components( HOC )?
How to use HOC
Understanding Context in React
React and its component structure
● What are Hooks?
● React Hooks and their capabilities
● Migrating Your Existing Apps to React Hooks
● Combine Existing React Hooks into New Custom Hooks
● Benefits of using React Hooks
● Best Practices
A step towards the way you write the code in React application.In this presentation, I have given introduction about React hooks. Why we need it in our react applications and describe about the two most commonly used React Hooks API useState and useEffect. I also given the links of code snippets I added in these slides
The session will provide the knowledge about react page life cycle and how more precise actions or operations can be performed using react hooks concepts
Around us everything goes through a cycle of taking birth, growing and at some point in time it will die.
Consider trees, any software application, yourself, a div container or UI component in a web browser, each of these takes birth, grows by getting updates and dies.
The lifecycle methods are various methods which are invoked at different phases of the lifecycle of a component.
The React component goes through the following phases
1) Initialization
2) Mounting
3) Update
4) Unmounting
Introduction to React in combination with Redux. Redux helps you to develop applications in a simple way while having features like time-travel available during development.
Getting started with the reactjs, basics of reactjs, introduction of reactjs, core concepts of reactjs and comparison with the other libraries/frameworks
State is managed within the component in which variables declared in function body. State can be changed. State can be accessed using “useState” Hook in functional components and “this.state” in class components. Hook is a new feature in react. To use this expression it’s essential to have good understanding of class components. State hold information that used for UI by browser.
https://www.ducatindia.com/javatraining/
React JS; all concepts. Contains React Features, JSX, functional & Class comp...Karmanjay Verma
This ppt contains all concepts of React JS. This contains React Features JSX, functional & Class component, Hooks. PPT includes sample code also for each defination in comment.
For more detail and source code
https://github.com/KPCodeLearning/React-Learning-App
https://kpcodelearning.github.io/React-Learning-App/
https://www.linkedin.com/in/karmanjayverma/
Around us everything goes through a cycle of taking birth, growing and at some point in time it will die.
Consider trees, any software application, yourself, a div container or UI component in a web browser, each of these takes birth, grows by getting updates and dies.
The lifecycle methods are various methods which are invoked at different phases of the lifecycle of a component.
The React component goes through the following phases
1) Initialization
2) Mounting
3) Update
4) Unmounting
Introduction to React in combination with Redux. Redux helps you to develop applications in a simple way while having features like time-travel available during development.
Getting started with the reactjs, basics of reactjs, introduction of reactjs, core concepts of reactjs and comparison with the other libraries/frameworks
State is managed within the component in which variables declared in function body. State can be changed. State can be accessed using “useState” Hook in functional components and “this.state” in class components. Hook is a new feature in react. To use this expression it’s essential to have good understanding of class components. State hold information that used for UI by browser.
https://www.ducatindia.com/javatraining/
React JS; all concepts. Contains React Features, JSX, functional & Class comp...Karmanjay Verma
This ppt contains all concepts of React JS. This contains React Features JSX, functional & Class component, Hooks. PPT includes sample code also for each defination in comment.
For more detail and source code
https://github.com/KPCodeLearning/React-Learning-App
https://kpcodelearning.github.io/React-Learning-App/
https://www.linkedin.com/in/karmanjayverma/
Mildaintrainings offers advanced ReactJS Interview Questions 2019 that helps you in cracking your interview & acquire your dream career as ReactJS Developer. Visit in this link :- https://mildaintrainings.com/blogs/react-js-interview-questions-answers/
If you want to get trained in React and wish to develop interesting UI’s on your own, then check out the ReactJS with Redux Certification Training by MildainTrainings, a trusted online learning company with a network of more than 50,000 satisfied learners spread across the globe.
Comparison of Function Components and Class Components in React.jsStudySection
Explore the differences in React.js component creation with our detailed comparison between function and class components. Discover the simplicity of function components and the versatility of class components, empowering you to make informed choices for your projects. Dive into the world of React.js development with StudySection Blogs!
In React, components are the building blocks of a user interface. They are reusable, self-contained pieces of code that encapsulate a specific functionality or UI element.
At Lia Infraservice we create Dynamic Websites. Become a front-end React JS developer and be a part of our tech-savvy Web App Development Company in Chennai.
Choosing Between Functional and Class Components in React: What You Need to KnowStudySection
React developers, you’ve got two main ways to build components: functional components for simplicity and performance, and class components for state and lifecycle management. Want to dive deeper? Check out the StudySection blogs for more on this and other tech topics!
Technical Chamber is one of the best website that will help you to get the best technical and programming solutions , If you are looking for hooks in react js , You can visit this website for more details : https://www.technicalchamber.com/2023/04/how-to-use-hooks-in-react-js.html
In the realm of web development, React has emerged as one of the most popular JavaScript libraries for building user interfaces. At the heart of React lies its powerful concept of components, which allows developers to create reusable and modular UI elements. In this blog post, we will explore the world of React components, diving deep into their structure, lifecycle, state management, and best practices. Whether you are a beginner or an experienced developer, this comprehensive guide will equip you with the knowledge and skills to harness the full potential of React components.
Data Sharing Between Child and Parent Components in AngularJSFibonalabs
Data sharing between components in angular is an important thing in a component-based framework. Small components are good to manage in angular. When we start breaking down the complex requirements into smaller ones (I.e., smaller components) then it's very important to have a proper data-sharing mechanism. There are multiple ways in which data is shared between the components.
A Complete Guide to Building a Ground-Breaking UX Design StrategyFibonalabs
Ground-breaking UX strategy backed by a solid UX strategy process, leads to a successful digital product. You can uncover answers about users' needs, business goals, and a roadmap to achieve them. If you are looking forward to building a user-centric digital product, then UX design strategy can be the first milestone that you need to cross.
Measures to ensure Cyber Security in a serverless environmentFibonalabs
A serverless environment/architecture is a manner in which applications are run without any physical server or without a specific infrastructure. It is a virtual setup where the server along with the applications is managed via cloud computing. It has innumerable benefits.
How to implement Micro-frontends using QiankunFibonalabs
Micro-frontends extend the concepts of microservices to the frontend world. The current trend is to build feature-rich and powerful browser applications/single-page apps, which sit on top of microservice architecture. Over time the frontend layer, often developed by a separate team, grows and gets more difficult to maintain.
Different Cloud Computing Services Used At FibonalabsFibonalabs
Cloud computing is not just the present but also the future of the world of technology. We at Fibonalabs believe in staying ahead of our game and providing cloud computing services is one of our areas of expertise. Using the latest cloud technologies, we develop mobile and web applications that are user-friendly, appealing, and excellent in terms of functionality.
How Can A Startup Benefit From Collaborating With A UX Design PartnerFibonalabs
If you own a start-up, you know that the investment made is huge and there is an immediate need to place your foot in the market, especially in today’s cutthroat competition. In such a scenario partnering with a UX design partner will not only help you in getting the work done by trained professionals but will also save a lot of time and effort needed to train the beginners. And once you set a standard for your startup, you will see it reflected in not only the work but also in the culture of your organization.
How to make React Applications SEO-friendlyFibonalabs
While developing applications with React, we should be careful about the website structure, what pages are loading, the loading time, and how long it will take the search engine bots to crawl and analyze the pages. Single Page Applications offer a seamless user experience, a native-like feel, and improved performance, and they should not be disregarded just because of the SEO challenges.
Heuristic evaluation is crucial for developing a great product that users can easily engage with and find valuable. It is a comprehensive evaluation of the user interface of a product. Its objective is to uncover usability problems that might arise when users interact with a product and suggest solutions.
Push Notifications: How to add them to a Flutter AppFibonalabs
With the fame that Flutter has garnered over the years, it has become the top choice of business owners for cross-platform mobile app development. With the enhancement of features like push notifications, it has further made its place firmly in the world of app development. In this blog, I will help you understand firebase cloud messaging by showing the procedure of adding Push Notification in a Flutter app for android with the help of a sample project. Let’s discuss the steps that need to be executed for this phenomenal integration.
Key Skills Required for Data EngineeringFibonalabs
Data Engineering is a term whose probability of appearing on social media platforms is as high as encountering a black car on a highway. It is a hot topic everywhere due to many reasons. In the past couple of years, Data Engineering has been chosen as a profession by so many people. Organizations have increased the number of vacancies for this job, and all this for what? Because data is everything. Handling a bulk of data that we store on our clouds or hardware, structuring it, making it useful, formatting it, and so much more can be done if you have the right data engineering skills.
Ways for UX Design Iterations: Innovate Faster & BetterFibonalabs
Any stage of the design process, even post the product release is scrutinized for any improvements. The iterative design process is of great help in such a scenario. It's important to keep in mind, though, that iterative design will be more cost-effective the earlier it is used in a product's lifespan.
Factors that could impact conversion rate in UX DesignFibonalabs
A good user experience enhances users’ engagement with your product and lets them seamlessly complete their interactions—which might include conversion actions such as subscribing or purchasing a product. User experience is relatable to how your users, leads, or potential clients engage or interact with your interface. It depicts how easily they can find what they’re searching for — without being paused by unnecessary friction, which can make them disappear or never return.
Information Architecture in UX: To offer Delightful and Meaningful User Exper...Fibonalabs
It is the visual representation of the organization, structure, and labelling of the information in the digital product. The main goal of IA is to offer a delightful user experience facilitating the user-centred design with a good navigation system. This enables users to easily find what they are looking for.
Cloud Computing Architecture: Components, Importance, and TipsFibonalabs
Now that we know the effectiveness of cloud computing architecture, its importance, and its components, it goes without saying that cloud services and applications are the need of the hour. With a great future ahead, cloud computing has become the top choice for small, medium, and large businesses.
Choose the Best Agile Product Development Method for a Successful BusinessFibonalabs
Unlike the traditional, time-boggling development methods like the waterfall model, spiral method, etc., agile is more inclined towards continuous communication between the client and the engineering team. Agile software development focuses on the micromanagement of things by tracking the smallest progress in a defined manner. This way the changes in the requirements that occur even in the middle of the project completion are infused in a more progressive manner.
Atomic Design: Effective Way of Designing UIFibonalabs
Atomic Design is a methodology developed by Brad Frost to guide developers in the creation of more intentional and hierarchical interface design systems.
Agile Software Development with Scrum_ A Complete Guide to The Steps in Agile...Fibonalabs
Agile scrum methodology is not only a model but a wonderful exercise in itself. It takes care of so many parameters that are involved in the development of software. Giving eye to detail is one of the most fascinating features of this framework. The steps in an agile scrum methodology involve envisioning, planning, developing, testing, and bug fixing for software. With scrum architecture, you can ensure continuous development, improvement, and delivery of a software product.
7 Psychology Theories in UX to Provide Better User ExperienceFibonalabs
Human psychology laws help predict human behaviour in various circumstances/social scenarios. It’s not only limited to the interaction with the product but it also gives us instructions about the cognitive load or selection bias in the scenario where the user is going to interact with the product.
Moving From JavaScript to TypeScript: Things Developers Should KnowFibonalabs
Moving from javascript to typescript is not that tedious if you follow the proper steps since every JS code is a valid typescript code. You can choose to convert the files where you require strict typing and keep the other files without a change.
Search and Society: Reimagining Information Access for Radical FuturesBhaskar Mitra
The field of Information retrieval (IR) is currently undergoing a transformative shift, at least partly due to the emerging applications of generative AI to information access. In this talk, we will deliberate on the sociotechnical implications of generative AI for information access. We will argue that there is both a critical necessity and an exciting opportunity for the IR community to re-center our research agendas on societal needs while dismantling the artificial separation between the work on fairness, accountability, transparency, and ethics in IR and the rest of IR research. Instead of adopting a reactionary strategy of trying to mitigate potential social harms from emerging technologies, the community should aim to proactively set the research agenda for the kinds of systems we should build inspired by diverse explicitly stated sociotechnical imaginaries. The sociotechnical imaginaries that underpin the design and development of information access technologies needs to be explicitly articulated, and we need to develop theories of change in context of these diverse perspectives. Our guiding future imaginaries must be informed by other academic fields, such as democratic theory and critical theory, and should be co-developed with social science scholars, legal scholars, civil rights and social justice activists, and artists, among others.
"Impact of front-end architecture on development cost", Viktor TurskyiFwdays
I have heard many times that architecture is not important for the front-end. Also, many times I have seen how developers implement features on the front-end just following the standard rules for a framework and think that this is enough to successfully launch the project, and then the project fails. How to prevent this and what approach to choose? I have launched dozens of complex projects and during the talk we will analyze which approaches have worked for me and which have not.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
GenAISummit 2024 May 28 Sri Ambati Keynote: AGI Belongs to The Community in O...
React Class Components vs Functional Components: Which is Better?
1. React Class Components vs
functional Components: Which
is Better?
https://fibonalabs.com/
2.
3. To understand class and functional components, we should first understand
how these to React components evolved. React is an open-source front-end JS
library for building interactive user interfaces. Some of the famous features are
the virtual DOM, one-way data binding, JSX, reusable components, stable
code, fast rendering of UI elements, and performance optimization.
Along with these advantages, React also offers two types of components that
the developers could use to create UI elements. It can be assumed that both
provide the same opportunities for writing UI elements. But it isn't true.
4. The real reason was that class components were the only option to develop
complex code. The reason was with class components that you get additional
features like state, while functional components didn’t have such an option.
However, the situation changed with React v16.8 which was released in 2019.
It took the development of the functional components to a new level. React
offered hooks for functional components. The introduction of hooks made it
possible to write complex code using only functions.
5. Functional Components
Props are inputs for both types of components. One of the main tasks of props
is to pass information from one component to another. However, props are
read-only. That means all React components shouldn’t change their props
value and must return the same result. Components that respect their props
are called “pure”. That rule works both for class and function components.
Another way of declaring functional components is by using an arrow function.
Arrow functions have some advantages:
1. It looks compact. Functions are easier to read and write.
6.
7. Class Components
Props work well with both class and functional components. Additional benefits
of class components are that they have a state and lifecycle. This is the reason
they are called “stateful” components.
The state of a component is an object that holds some information and controls
the behaviour of the component. The difference between props and state is that
props don’t change over time, but the state holds the data that can be changed
over time and changes the component rendering.
8.
9. Difference between Functional and Class Components
● State and Lifecycle: The difference between functional and class
components was that class components provide features such as
setState() and lifecycle methods componentDidMount(),
componentWillUnmoun(), etc., while functional components don’t.
Functional components are plain JavaScript functions that accept props
and return React elements, while class components are JavaScript classes
that extend React. A component that has a render method. Both state and
lifecycle methods come from React. Component, hence available in only
10. However, things changed with the introduction of Hooks. To replace setState
(in-class components) React offers useState Hook for functional components.
To work with components lifecycle, classes have methods like
componentDidMount, componentWillUnmount, componentWillUpdate, and
componentDidUpdate whereas functional components have a hook called
useEffect.
● Syntax:
➢ Declaration: Functional components are JavaScript functions whereas
Class components are classes that extend React.Component.
11.
12. ➢ The Way Props are Passes: Working with functional components, we
pass the props as an argument of the function using “props.name”. With
class components, we need to add this. to refer to props.
14. ➢ Handling State: To handle state functional components in React have a
useState()Hook. We assign the initial count equal to 0 and set the method
setCount() that increments by one every time we click a button. The type of
argument can be a number, string, object, or null.
Class components use the setState() function which requires a constructor
and this keyword to refer to the state.
17. ➢ Hoisting Works Only for Functional Components: Hoisting is a concept
where variables and function declarations are moved to the top that allows
you to access the variable or function first and then declare it. Javascript
doesn’t modify the code, instead, it puts declarations in memory during the
compilation that allows calling a function before you declare it. Whereas in
classes, if we try to get access to a class before the declaration it throws a
ReferenceError exception.
18.
19. ➢ Running Tests: There are two most popular utilities for testing - Enzyme
and Jest. The enzyme is a JS testing utility for React that allows testing
React renders. Jest is a JS testing framework for creating, running, and
structuring tests.
These two utilities work well with both types of components. There are
some specific things to keep in mind in running tests for functional
components, like, the state hooks are internal to the component and can’t
be tested by calling them. Same with methods and functions.
20. ➢ Performance Difference: People think that functional components have
better performance than class components. React functional components
are simple Objects with 2 properties: type (string) and props (object). To
render such a component React needs to call the function and pass down
the props.
Class components are instances of React.Component with the constructor
in it and complex flows for manipulating state and lifecycle.
21. Advantages of a Functional Component Over a Class Component
1. A functional component is easier to read and test as they are just plain JS
functions.
2. You write less code.
3. The React team stated that there may be a performance boost for a
functional component in future releases.
22. In a Nutshell
● Earlier, class components were the only option to add states to
components and manipulate the lifecycle. However, since the introduction
of React Hooks, now we can add the same functionality to function
components.
● The major difference is the syntax. It is related to the way we declare
components, pass props, handle states, and manage the lifecycle.
● Functional components capture the props and state by default.
23. ● Functional components require less code to write. It's subjective and
depends on the developer on how he wants to write the code.
● There are two popular tools to test functional and class components:
Enzyme and Jest.
● There is not much difference in render time between class and functional
components.