Internal workshop react-js-mruiz
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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.
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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/
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Internal workshop react-js-mruiz
- 1. React A JS library for building user interfaces
- 2. What we will see... ● Meet React ● Fundamentals ● Components + JSX ● Props, PropType and State ● React Lifecycle ● Demo ● Want more?
- 3. Introduction
- 4. 1. Not jet another JS Framework 2. Just a library for creating User Interfaces 3. Renders your UI and respond to events
- 5. > ReactJS has no... ● Controllers ● Directives ● Templates ● Global Event listeners ● Models > Just components! First fundamental... Everything is a COMPONENT
- 6. > Changes always flow down via props, never up > Callbacks and actions will flow up Second fundamental... Unidirectional Data Flow
- 7. 1. React builds a new virtual DOM subtree 2. Diffs it with the old one 3. Computes the minimal set of DOM mutations and puts them in a queue 4. Batch executes all updates Third fundamental… Virtual DOM Makes re-rendering on every change fast
- 8. Creating components “We think that markup and the code that generates it are intimately tied together” React Docs
- 9. ● Every component has state and props ● Data is handled from parent to child ● Owner-ownee VS Parents-Children ● It acts as an inmutable DOM and re- render de app once the state changes wait...what´s {that}?...Angular? Component example
- 10. JSX {}
- 11. > Why should we learn another template language? JSX
- 12. JSX → Javascript Syntax Extension that looks similar to XML 1. JSX is faster because it performs optimization while compiling code to JavaScript 2. It is also type-safe and most of the errors can be caught during compilation JSX
- 13. > Easy right? React conversions
- 14. Props, PropTypes & State
- 15. > Used to pass parameters from parent to childrenProps
- 16. PropTypes > Used to catch a lot of bug by typechecking props
- 17. > When should I use state? Respond to user input Server requests The passage of time > Calling setState({...}) re-renders the component State
- 18. > When should I use state? Respond to user input Server requests The passage of time > Just use props to pass data & event handlers down to your child components. Props vs State
- 19. React Lifecycle
- 20. > componentDidMount() Make an Ajax request to fetch some data needed for this component > componentWillUnmount() Remove any listeners you initially set up > componentDidMount() Set up any listeners (ie Websockets or Firebase listeners) https://staminaloops.github.io/ undefinedisnotafunction/images/ react-lifecycle.jpg Lifecycle
- 21. > Demo has: - Webpack (Babel & Imports) - React Hot Loader - Bootstrap 3 > Steps to reproduce: - git clone https://github.com/B ackSpaceTech/react- bootstrap- boilerplate - npm i && npm start DEMO TIME
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