This document provides an introduction to React, including what React is, its history and timeline, common front-end development tasks it addresses, and its core fundamentals like JSX, functional programming principles, and components. It discusses React hooks like useState and useEffect, building a React project, and integrating third-party libraries. The workshop will cover topics like creating a new React app, building a component hierarchy for a todo list application, and using the key property for dynamic lists.
Learn React hooks best practices which you should follow in 2022. You will know the some of the best tricks to use the React hooks in 2022. Read the complete article for more insights.
In this presentation, Prashant Sharma of Valuebound has talked about ReactJS - a JavaScript library for building user interfaces. Check out the agendas to know what is there for you.
----------------------------------------------------------
Get Socialistic
Our website: http://valuebound.com/
LinkedIn: http://bit.ly/2eKgdux
Facebook: https://www.facebook.com/valuebound/
Twitter: http://bit.ly/2gFPTi8
React is a JavaScript library for building user interfaces. It introduces components as the building blocks of interfaces and uses a virtual DOM for improved efficiency. Components come in two types - class components and function components. Class components require the use of the render() method and extend React.Component, while function components are now preferred and can use hooks to manage state and lifecycles. Props are used to pass data to components, events allow user interactions to trigger behavior, and forms are built similarly to HTML but their data is handled by the components' state.
ReactJS is a popular JavaScript library for building user interfaces. It allows developers to create reusable UI components and was developed by Facebook. Some major companies that use React include Instagram, Netflix, Yahoo Mail, and WhatsApp. React can be installed on Ubuntu and Windows systems. Key features of React include components, props, state, and JSX syntax which allows HTML-like markup to be written in JavaScript.
ReactJS is a JavaScript library for building user interfaces. It uses a virtual DOM and only updates parts of the real DOM that changed. React uses a component-based architecture where data flows unidirectionally via props and state. Lifecycle methods allow components to handle state changes. Components are built with JSX syntax and can be nested to build up an application from reusable pieces.
This document provides an overview of React including: key features like components, JSX, and unidirectional data flow; installation and technical requirements; the component lifecycle; differences from Angular; popular companies using React; and links to examples. It covers React concepts like states, props, and events. Questions from attendees are invited at the end.
Ever wondered what React.js or its more common term ‘React’ is and why there is such a buzz about it in the software development community? Well, React is an open-source JavaScript framework and library developed by Facebook and it’s used for building interactive user interfaces and web applications quickly and efficiently with significantly less code than you would with vanilla JavaScript. But we are sure, this won’t be enough for you and to know more about React and learn about its amazing features, GDSC NIT Silchar brings its next session “KICKSTART TO REACT” where we will explore React and how it can be used to build modern and interactive UI websites.
Adding a modern twist to legacy web applicationsJeff Durta
Avoid misery of working with legacy code
We will see how you can add independent and isolated components to existing pages; pages that may be difficult to change
React and Flux allow you to make self-contained additions that handle their own data access/persistence
1. The document discusses adding React components to ASP.NET MVC applications using React JS.NET.
2. It explains how React JS.NET allows bootstrapping a React component tree from a C# view, allowing ASP.NET MVC apps to contain React component trees.
3. The document provides an overview of key aspects like how ReactDOM.Render() is called, using JSX files, fetching data from server-side MVC code, and rendering components on the server-side for performance.
20180518 QNAP Seminar - Introduction to React NativeEric Deng
What is React Native?
How does React Native work?
Writing React Native
Expo
Components, props, and states
Component lifecycle
Declarative and imperative
Event handling
User input
Style
Layout
Data access
Publishing your Project
This document provides an overview of React including React components, class components, props, and events. It discusses that React is a JavaScript library created by Facebook for building user interfaces out of components. Components are independent and reusable bits of code that return HTML. There are two types of components: class components and function components, with function components now being preferred with the addition of hooks. Props are arguments passed into components via HTML attributes. Events in React are similar to HTML events and can be used to trigger actions when user events occur.
React components are the building blocks of React applications. There are two types of components in React - functional components and class components. Functional components are simple JavaScript functions that return JSX, while class components are ES6 classes that can maintain internal state and pass data between other components. Components render reusable pieces of UI and the entire application UI is composed of different individual components.
Technologies are ever changing and since we're building our applications on the shoulders of giants like Babel,... We have to stay up-to-date with the newest trends.
We at Codifly strongly believe in using the newest technologies, that's why we've organised a meetup to showcase these for you. This event was organised in collaboration with ITLab HoGent at Campus Schoonmeersen (Voskenslaan 270, 9000 Ghent).
A certain level of knowledge about these subjects is required since we're mostly be going over the recent changes. For Babel we're discussing what's new in their upcoming version 7, for Webpack the changes from 3 -> 4.6 will be discussed and for React all the new features in React 16.3 and the upcoming ones.
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/
React Native for multi-platform mobile applicationsMatteo Manchi
Since its 2013 release, React has brought a new way to design UI components in the world wide web. The same foundamentals have been taken to another important environment in our contemporary world: the mobile application.
This month we'll see the philosophy behind React Native - learn once, write anywhere - and how this new framework helps new developers to build native apps using React.
React gsg presentation with ryan jung & elias malikLama K Banna
React is a client-side JavaScript library for building user interfaces that is made and open-sourced by Facebook. It uses a virtual DOM for fast rendering and reusable components to build up the UI. Components can have their own state that causes re-rendering when updated. Events are handled through callbacks. JSX allows writing HTML-like code mixed with JavaScript.
Managing state across complex apps with many interacting components can be challenging. Flux and Redux address this with a single source of truth store and reducer functions that update state immutably in response to actions. Side effects like API calls require middleware like thunks, sagas, or API-specific middleware to isolate impure logic from pure reducers.
Enhance react app with patterns - part 1: higher order componentYao Nien Chung
Writing codes without mindset is a mess. Use one of React advanced patterns to enhance your code base by Higher Order Component.
Please check demo repo for more detail: https://github.com/xJkit/trendmicro-fed-talk-pattern-hoc
Interaction Latency: Square's User-Centric Mobile Performance MetricScyllaDB
Mobile performance metrics often take inspiration from the backend world and measure resource usage (CPU usage, memory usage, etc) and workload durations (how long a piece of code takes to run).
However, mobile apps are used by humans and the app performance directly impacts their experience, so we should primarily track user-centric mobile performance metrics. Following the lead of tech giants, the mobile industry at large is now adopting the tracking of app launch time and smoothness (jank during motion).
At Square, our customers spend most of their time in the app long after it's launched, and they don't scroll much, so app launch time and smoothness aren't critical metrics. What should we track instead?
This talk will introduce you to Interaction Latency, a user-centric mobile performance metric inspired from the Web Vital metric Interaction to Next Paint"" (web.dev/inp). We'll go over why apps need to track this, how to properly implement its tracking (it's tricky!), how to aggregate this metric and what thresholds you should target.
AI_dev Europe 2024 - From OpenAI to Opensource AIRaphaël Semeteys
Navigating Between Commercial Ownership and Collaborative Openness
This presentation explores the evolution of generative AI, highlighting the trajectories of various models such as GPT-4, and examining the dynamics between commercial interests and the ethics of open collaboration. We offer an in-depth analysis of the levels of openness of different language models, assessing various components and aspects, and exploring how the (de)centralization of computing power and technology could shape the future of AI research and development. Additionally, we explore concrete examples like LLaMA and its descendants, as well as other open and collaborative projects, which illustrate the diversity and creativity in the field, while navigating the complex waters of intellectual property and licensing.
What Not to Document and Why_ (North Bay Python 2024)Margaret Fero
We’re hopefully all on board with writing documentation for our projects. However, especially with the rise of supply-chain attacks, there are some aspects of our projects that we really shouldn’t document, and should instead remediate as vulnerabilities. If we do document these aspects of a project, it may help someone compromise the project itself or our users. In this talk, you will learn why some aspects of documentation may help attackers more than users, how to recognize those aspects in your own projects, and what to do when you encounter such an issue.
These are slides as presented at North Bay Python 2024, with one minor modification to add the URL of a tweet screenshotted in the presentation.
The Rise of Supernetwork Data Intensive ComputingLarry Smarr
Invited Remote Lecture to SC21
The International Conference for High Performance Computing, Networking, Storage, and Analysis
St. Louis, Missouri
November 18, 2021
How to Avoid Learning the Linux-Kernel Memory ModelScyllaDB
The Linux-kernel memory model (LKMM) is a powerful tool for developing highly concurrent Linux-kernel code, but it also has a steep learning curve. Wouldn't it be great to get most of LKMM's benefits without the learning curve?
This talk will describe how to do exactly that by using the standard Linux-kernel APIs (locking, reference counting, RCU) along with a simple rules of thumb, thus gaining most of LKMM's power with less learning. And the full LKMM is always there when you need it!
Scaling Connections in PostgreSQL Postgres Bangalore(PGBLR) Meetup-2 - MydbopsMydbops
This presentation, delivered at the Postgres Bangalore (PGBLR) Meetup-2 on June 29th, 2024, dives deep into connection pooling for PostgreSQL databases. Aakash M, a PostgreSQL Tech Lead at Mydbops, explores the challenges of managing numerous connections and explains how connection pooling optimizes performance and resource utilization.
Key Takeaways:
* Understand why connection pooling is essential for high-traffic applications
* Explore various connection poolers available for PostgreSQL, including pgbouncer
* Learn the configuration options and functionalities of pgbouncer
* Discover best practices for monitoring and troubleshooting connection pooling setups
* Gain insights into real-world use cases and considerations for production environments
This presentation is ideal for:
* Database administrators (DBAs)
* Developers working with PostgreSQL
* DevOps engineers
* Anyone interested in optimizing PostgreSQL performance
Contact info@mydbops.com for PostgreSQL Managed, Consulting and Remote DBA Services
MYIR Product Brochure - A Global Provider of Embedded SOMs & SolutionsLinda Zhang
This brochure gives introduction of MYIR Electronics company and MYIR's products and services.
MYIR Electronics Limited (MYIR for short), established in 2011, is a global provider of embedded System-On-Modules (SOMs) and
comprehensive solutions based on various architectures such as ARM, FPGA, RISC-V, and AI. We cater to customers' needs for large-scale production, offering customized design, industry-specific application solutions, and one-stop OEM services.
MYIR, recognized as a national high-tech enterprise, is also listed among the "Specialized
and Special new" Enterprises in Shenzhen, China. Our core belief is that "Our success stems from our customers' success" and embraces the philosophy
of "Make Your Idea Real, then My Idea Realizing!"
Paradigm Shifts in User Modeling: A Journey from Historical Foundations to Em...Erasmo Purificato
Slide of the tutorial entitled "Paradigm Shifts in User Modeling: A Journey from Historical Foundations to Emerging Trends" held at UMAP'24: 32nd ACM Conference on User Modeling, Adaptation and Personalization (July 1, 2024 | Cagliari, Italy)
An invited talk given by Mark Billinghurst on Research Directions for Cross Reality Interfaces. This was given on July 2nd 2024 as part of the 2024 Summer School on Cross Reality in Hagenberg, Austria (July 1st - 7th)
Hire a private investigator to get cell phone recordsHackersList
Learn what private investigators can legally do to obtain cell phone records and track phones, plus ethical considerations and alternatives for addressing privacy concerns.
Fluttercon 2024: Showing that you care about security - OpenSSF Scorecards fo...Chris Swan
Have you noticed the OpenSSF Scorecard badges on the official Dart and Flutter repos? It's Google's way of showing that they care about security. Practices such as pinning dependencies, branch protection, required reviews, continuous integration tests etc. are measured to provide a score and accompanying badge.
You can do the same for your projects, and this presentation will show you how, with an emphasis on the unique challenges that come up when working with Dart and Flutter.
The session will provide a walkthrough of the steps involved in securing a first repository, and then what it takes to repeat that process across an organization with multiple repos. It will also look at the ongoing maintenance involved once scorecards have been implemented, and how aspects of that maintenance can be better automated to minimize toil.
Data Protection in a Connected World: Sovereignty and Cyber Securityanupriti
Delve into the critical intersection of data sovereignty and cyber security in this presentation. Explore unconventional cyber threat vectors and strategies to safeguard data integrity and sovereignty in an increasingly interconnected world. Gain insights into emerging threats and proactive defense measures essential for modern digital ecosystems.
Blockchain and Cyber Defense Strategies in new genre timesanupriti
Explore robust defense strategies at the intersection of blockchain technology and cybersecurity. This presentation delves into proactive measures and innovative approaches to safeguarding blockchain networks against evolving cyber threats. Discover how secure blockchain implementations can enhance resilience, protect data integrity, and ensure trust in digital transactions. Gain insights into cutting-edge security protocols and best practices essential for mitigating risks in the blockchain ecosystem.
Sustainability requires ingenuity and stewardship. Did you know Pigging Solutions pigging systems help you achieve your sustainable manufacturing goals AND provide rapid return on investment.
How? Our systems recover over 99% of product in transfer piping. Recovering trapped product from transfer lines that would otherwise become flush-waste, means you can increase batch yields and eliminate flush waste. From raw materials to finished product, if you can pump it, we can pig it.
UiPath Community Day Kraków: Devs4Devs ConferenceUiPathCommunity
We are honored to launch and host this event for our UiPath Polish Community, with the help of our partners - Proservartner!
We certainly hope we have managed to spike your interest in the subjects to be presented and the incredible networking opportunities at hand, too!
Check out our proposed agenda below 👇👇
08:30 ☕ Welcome coffee (30')
09:00 Opening note/ Intro to UiPath Community (10')
Cristina Vidu, Global Manager, Marketing Community @UiPath
Dawid Kot, Digital Transformation Lead @Proservartner
09:10 Cloud migration - Proservartner & DOVISTA case study (30')
Marcin Drozdowski, Automation CoE Manager @DOVISTA
Pawel Kamiński, RPA developer @DOVISTA
Mikolaj Zielinski, UiPath MVP, Senior Solutions Engineer @Proservartner
09:40 From bottlenecks to breakthroughs: Citizen Development in action (25')
Pawel Poplawski, Director, Improvement and Automation @McCormick & Company
Michał Cieślak, Senior Manager, Automation Programs @McCormick & Company
10:05 Next-level bots: API integration in UiPath Studio (30')
Mikolaj Zielinski, UiPath MVP, Senior Solutions Engineer @Proservartner
10:35 ☕ Coffee Break (15')
10:50 Document Understanding with my RPA Companion (45')
Ewa Gruszka, Enterprise Sales Specialist, AI & ML @UiPath
11:35 Power up your Robots: GenAI and GPT in REFramework (45')
Krzysztof Karaszewski, Global RPA Product Manager
12:20 🍕 Lunch Break (1hr)
13:20 From Concept to Quality: UiPath Test Suite for AI-powered Knowledge Bots (30')
Kamil Miśko, UiPath MVP, Senior RPA Developer @Zurich Insurance
13:50 Communications Mining - focus on AI capabilities (30')
Thomasz Wierzbicki, Business Analyst @Office Samurai
14:20 Polish MVP panel: Insights on MVP award achievements and career profiling
The DealBook is our annual overview of the Ukrainian tech investment industry. This edition comprehensively covers the full year 2023 and the first deals of 2024.
INDIAN AIR FORCE FIGHTER PLANES LIST.pdfjackson110191
These fighter aircraft have uses outside of traditional combat situations. They are essential in defending India's territorial integrity, averting dangers, and delivering aid to those in need during natural calamities. Additionally, the IAF improves its interoperability and fortifies international military alliances by working together and conducting joint exercises with other air forces.
2. What is React?
• React is a JavaScript framework
• Used for front end web development
• Think of jQuery, but more structured
• Created and used by Facebook
• Famous for implementing a virtual dom
3. Timeline of front-end JavaScript frameworks
jQuery*
(2006)
AngularJS
(2010)
React
(2013)
Vue
(2014)
Angular
(2014)
* jQuery is more often considered a library than a framework
4. Common tasks in front-end development
Data definition, organization, and storage
App state
Event handlers respond to user actions
User actions
Design and render HTML templates
Templates
Resolve URLs
Routing
Interact with server(s) through APIs and AJAX
Data fetching
5. Fundamentals of React
1. JavaScript and HTML in the same file (JSX)
2. Embrace functional programming
3. Components everywhere
6. JavaScript and HTML in the same file
Traditional
approach
React
approach
HTML CSS JS JSX CSS or JSS
7. JSX: the React programming language
const first = "Aaron";
const last = "Smith";
const name = <span>{first} {last}</span>;
const listWithTitle = (
<>
<h1>COMP 523</h1>
<ul>
<li>Dr. David Stotts</li>
<li>{name}</li>
</ul>
</>
);
const list = (
<ul>
<li>Dr. David Stotts</li>
<li>{name}</li>
</ul>
);
10. Functional programming
Functions are “first class citizens”
let add = function() {
console.log('Now adding numbers');
const five = 3 + 2;
};
function performTask(task) {
task();
console.log('Task performed!');
}
performTask(add);
function foo() {
return function() {
console.log('What gets printed?');
};
}
foo
foo();
foo()();
11. Functional programming
Variables are immutable
let a = 4;
a = 2; // Mutates `a`
let b = [1, 2, 3];
b.push(4); // Mutates `b`
let c = [...b, 4]; // Does not mutate `b`
13. Components
Components are functions for user interfaces
let y = f(x);
Input x Output number
let y = <FancyDiv value={x} />;
Input x Output HTML
Math function:
Component function:
14. Anatomy of a React component
export default function MyComponent(props) {
return <div>Hello, world! My name is {props.name}</div>;
}
const html = <MyComponent name="aaron" />;
Inputs are passed through a
single argument called “props”
The function is executed as if
it was an HTML tag
The function
outputs HTML
The component is just
a function
Parameters are passed in
as HTML attributes
15. Component rendering
• When a component function executes, we say it “renders”
• Assume components may re-render at any time
Our job is to ensure that
every time the component re-renders,
the correct output is produced
18. Creating a new React app
Creating a new React app is simple!
1. Install Node.js
2. Run: npx create-react-app app-name
3. New app created in folder: ./app-name
19. Anatomy of a new React app
App is a boilerplate
starter component
public holds the initial html
document and other static assets
package.json configures
npm dependencies
index.js binds
React to the DOM
21. Special list key property
• Situation: Display a dynamic array of elements
• Must specify a special “key” property for each element
• The key of an item uniquely identifies it
• Used by React internally for render optimization
• Can be any unique value (string or number)
22. What are hooks?
useState
useEffect
useReducer
useMemo
useRef
useCallback
We will cover
these today
We will not cover
these today
Built-in hooks:
Hooks: Special functions that allow
developers to hook into state and
lifecycle of React components.
State: One or more data values
associated with a React component
instance.
Lifecycle: The events associated with a
React component instance (create,
render, destroy, etc).
23. First React hook: useState
Purpose:
1. Remember values internally when the component re-renders
2. Tell React to re-render the component when the value changes
Syntax:
const [val, setVal] = useState(100);
The current value A setter function to
change the value
The initial
value to use
24. Predicting component re-rendering
A component will only re-render when…
1. A value inside props changes
2. A useState setter is called
– or –
25. Second React hook: useEffect
Purpose:
Act as an observer, running code in response to value changes
Syntax:
useEffect(() => {
console.log(`myValue was changed! New value: ${myValue}`);
}, [myValue]);
A list of values such that changes
should trigger this code to run
The code to run when
values change
26. Building a React project
• When you’re ready to launch your app, run this command:
npm run build
• This bundles your app into CSS/JS/HTML files and puts them in the
/build folder
• These files can be served from an AWS S3 bucket
27. 3rd party components and libraries
• React-Router
• Redux
• Material-UI
• Bootstrap
• Font-Awesome
• SWR