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.
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This document provides an introduction to React.js, including:
- React is a JavaScript library for building user interfaces and was developed by Facebook. It is the VIEW component in MVC architecture.
- Key features and benefits of React include being fast, modular, scalable, flexible, and popular due to its employability. Large companies like Facebook use React.
- Core concepts of React include JSX, components, unidirectional data flow, and the virtual DOM which improves performance compared to traditional frameworks. Components are reusable pieces that make up the entire application.
React JS Training in Bangalore is a document that provides an overview of React JS and its core concepts. It discusses what React JS is, its components, props, state, lifecycle and pros and cons. React JS is a JavaScript library for building user interfaces that uses virtual DOM for efficient rendering. Components let you split UI into independent and reusable pieces, accepting props as input and state for private and re-renderable data. The document also provides contact information for React JS and React Native training in Bangalore.
React JS is a JavaScript library for building user interfaces that uses a component-based approach to build reusable UI components. The key concepts in React include components, props, state, and lifecycle methods. Components let you split the UI into independent and reusable pieces, accept arbitrary inputs through props, and return React elements. State is private to each component and triggers re-rendering when changed. The component lifecycle enables performing actions when a component mounts or unmounts. React is efficient due to its virtual DOM implementation and use of JSX syntax. While it has a learning curve, React is well-suited for building user interfaces, especially for large teams.
Intro to React - Featuring Modern JavaScriptjasonsich
This document summarizes React, a JavaScript library for building user interfaces. It discusses key React concepts like the virtual DOM, one-way data flow, components, ES6 support, Flux architecture, testing with Jest, mixins, and isomorphic JavaScript. Tools mentioned include Babel, Browserify, Gulp, and Webpack. Examples provided are a meal planner app using Webpack and one using Browserify.
ReactJS is a JavaScript library for building user interfaces. It uses a virtual DOM to detect changes and efficiently update the real DOM. Key features include:
- Using JSX syntax and ES6 features like classes
- Creating reusable UI components
- Unidirectional data flow from parent to child components
- Handling events and managing local component state
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.
This document provides an overview and introduction to React, Redux, and related technologies. It discusses why React is useful, comparisons to other frameworks, an overview of Flux and how Redux differs, concepts like actions, reducers, and stores in Redux, using Immutable.js with Redux, and examples of React and Redux applications. It also touches on ES6 features, useful related modules, resources for learning more, and potential future directions.
This document provides an introduction to React and React Native. It begins with an overview of ReactJS, including its motivation as a library for building user interfaces and key concepts like components, the virtual DOM, JSX, immutability, and one-way data flow. It then covers React Native, explaining how it uses native components to render interfaces for mobile rather than HTML/CSS. The document concludes with exercises for creating basic React and React Native apps.
- React is a JavaScript library for building user interfaces that uses a virtual DOM for faster re-rendering on state changes.
- Everything in React is a component that can have states, props, and lifecycle methods like render(). Components return JSX elements.
- Props are used for passing data to components in a unidirectional flow, while states allow components to re-render on changes.
- The render() method returns the view, accessing props and state values. Forms and events also follow React conventions.
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.
React is a JavaScript framework used for building user interfaces. It uses components as the building blocks for user interfaces and embraces functional programming principles like immutable data and pure functions. The key aspects of React include JSX which allows writing HTML in JavaScript files, components which are functions that output HTML, and hooks which allow components to interact with state and lifecycle events.
This document provides an overview of ReactJS including installing ReactJS, configuring ReactJS locally and via CDN, what JSX is, creating custom components with JSX, ReactJS event handling, lifecycle, stateful components, precompiling JSX, developing a digital clock, and debugging ReactJS. It also discusses the ReactJS initialization, lifetime, and teardown phases and provides an example of the component lifecycle.
This document provides a summary of React including:
- React components are composed of props, states, and lifecycle hooks.
- Data fetching is done using libraries like Axios in component lifecycle methods like componentDidMount.
- Shared state can be managed using libraries like Redux by connecting components to the global state store.
- Other React patterns covered include children components, higher-order components, render props, and performance techniques like shouldComponentUpdate.
- Routing is typically done with React Router, though server-side rendering requires additional configuration for asynchronous data fetching.
This document provides an introduction to React, a JavaScript library for building user interfaces. It discusses React's fundamentals like components and unidirectional data flow. It also covers topics like JSX, props, state, lifecycles, and demos creating a component. The document aims to explain what React is, its core concepts, and how to get started using it to build user interfaces.
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.
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2. CONTENT
• Introduction React JS and JSX
• Component, State, Props.
• Component API, Life Cycle.
• Pros & Cos
• Demonstration
3. WHAT IS REACT?
• A JavaScript Library For Building User Interfaces
• Renders your UI and responds to events.
• It also uses the concept called Virtual DOM, creates an in-memory data structure
cache, enumerates the resulting differences, and then updates the browser’s
displayed DOM efficiently.
• One of the unique features of React.js is not only it can perform on the client side, but
it can also be rendered on the server side, and they can work together interoperably.
4. #1 Everything is a Component:
React has no…
… controllers
… directives
… templates
… global event listeners
… models
… no view models
Just Components
5. #2 Single Source of Truth
Traditional data flows
No framework: Any component can communicate with any other component
React: 1-way data flow
9. COMPONENT
• Components let you split the UI into independent, reusable pieces, and think about
each piece in isolation.
• Conceptually, components are like JavaScript functions. They accept arbitrary inputs
(called "props") and return React elements describing what should appear on the
screen.
12. COMPONENT - STATE
class TodoInput extends React.Component {
constructor(props) {
super(props); //Call this function because 'this' is not allowed before super().
this.state = {
content: ''
};
this.addTodo = this.addTodo.bind(this);
}
updateState(e) {
this.setState({content: e.target.value});
}
addTodo() {
// We of course not declare onSave function of this component at parent component
// Refer to: Body.jsx for more information
// We declare this onSave at mapDispatchToProps function
this.props.onSave.call(this, this.state.content, this.props.todo && this.props.todo.id || null);
this.setState({
content: ''
})
}
render() {
return (
<div className="form-inline">
<div className="form-group">
<input className="form-control" type="text" value={this.state.content}
onChange={this.updateState}/>
</div>
</div>
);
}
}
13. REACT COMPONENT LIFECYCLE
• React enables to create components by invoking the React.createClass() method
which expects a render method and triggers a lifecycle that can be hooked into via a
number of so called lifecycle methods.
• This short article should shed light into all the applicable functions.
• Understanding the component lifecycle will enable you to perform certain actions
when a component is created or destroyed. Further more it gives you the
opportunity to decide if a component should be updated in the first place and to
react to props or state changes accordingly.
18. PROS & COS OF REACT.JS
THE GOOD POINTS:
• React.js is extremely efficient
- Virtual DOM
• It makes writing Javascript easier
- React.js uses a special syntax called JSX
• It gives you out-of-the-box developer
tools
- React.js chrome extension
• It’s awesome for SEO
• UI Test Cases
THE BAD:
• React.js is only a view layer.
• Integrating React.js into a traditional
MVC framework would require some
configuration
• There is a learning curve for beginners
who are new to web development.
19. Why you should use React.js:
• React.js works great for teams, strongly enforcing UI and workflow patterns.
• The user interface code is readable and maintainable.
• And also, there is now a lot of demand for developers with ReactJS experience.