Download - React.js
![Page 1: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/1.jpg)
React.js
![Page 2: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/2.jpg)
How the webapplications are/were created
Server side templates + jquery
Client side templates + MVC libraries
![Page 3: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/3.jpg)
React.js solves all these problems with Virtual DOM
![Page 4: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/4.jpg)
Real DOM - simplified
![Page 5: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/5.jpg)
Virtual DOM - simplified
![Page 6: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/6.jpg)
Virtual DOM
OldNew
Result on real DOM
![Page 7: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/7.jpg)
Hello World
![Page 8: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/8.jpg)
Hello World
![Page 9: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/9.jpg)
JSX
Optional
Recommended for faster, easier development
Noninvasive transformer
![Page 10: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/10.jpg)
HelloWorld transformed
![Page 11: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/11.jpg)
Component properties
![Page 12: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/12.jpg)
Component properties validation
![Page 13: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/13.jpg)
Changing data
Just rerender the whole application
… or at least big part of it
![Page 14: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/14.jpg)
Changing data
![Page 15: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/15.jpg)
Changing data
![Page 16: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/16.jpg)
Component state
![Page 17: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/17.jpg)
Props vs State
Props
External data
Can’t change it
State
Internal data
Can change it
Private for component
![Page 18: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/18.jpg)
Lifecycle callbacks
„componentWillMount”
„componentDidMount”
„componentWillReceiveProps”
„shouldComponentUpdate”
„componentWillUpdate”
„componentDidUpdate”
„componentWillUnmount”
![Page 19: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/19.jpg)
Events
![Page 20: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/20.jpg)
Form and the state
![Page 21: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/21.jpg)
Form state with mixin
![Page 22: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/22.jpg)
Performance
Always performs only DOM necessary changes
All components are rendered by default
„shouldComponentUpdate” to control whether the rendering is required
![Page 23: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/23.jpg)
Performance
![Page 24: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/24.jpg)
Performance
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Performance
![Page 26: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/26.jpg)
Performance
App > TodoList > TodoItem#2
![Page 27: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/27.jpg)
How to implement „shouldComponentUpdate”?
![Page 28: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/28.jpg)
Mutable data
![Page 29: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/29.jpg)
Immutable data
![Page 30: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/30.jpg)
Immutable data
Changing the data immutable way is hard
Helpers
http://facebook.github.io/react/docs/update.html
https://github.com/facebook/immutable-js
![Page 31: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/31.jpg)
„shouldComponentUpdate” with immutable data
![Page 32: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/32.jpg)
„shouldComponentUpdate” with mixin
![Page 33: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/33.jpg)
Server side rendering
![Page 34: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/34.jpg)
Debugging
![Page 35: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/35.jpg)
Performance profiler
![Page 36: React.js](https://reader033.vdocument.in/reader033/viewer/2022052700/55a690891a28ab9b418b45d9/html5/thumbnails/36.jpg)
Questions