今更聞けないReact

初めてReact.jsを書く人向けにとりあえず書き始めるまでに覚えると良いこと、初めましての後にどういうことが待っているのかを話しました。

【リンク集】
React.js公式ページ
https://reactjs.org/

create-react-app
https://github.com/facebookincubator/create-react-app
https://qiita.com/chibicode/items/8533dd72f1ebaeb4b614

初めましての後に
- Webpack, babel
https://webpack.js.org/
https://babeljs.io

- TypeScript or FlowType
https://www.typescriptlang.org/
https://flow.org/

- react-router
https://reacttraining.com/react-router/

- redux
http://redux.js.org/

- immutable.js
https://facebook.github.io/immutable-js/

【宣伝】
しがないラジオWebページ
https://shiganai.org

Transcript

1. ͍·͞Βฉ͚ͳ͍React
   @WEBΤϯδχΞษڧձ#03
   

   View Slide

2. Introduction
   •zuckey
   •developer at Yappli
   •React, PHP, Laravel
   •twitter: @zuckey_17
   •Podcastʮ͕͠ͳ͍ϥδΦʯύʔιφϦςΟʔ
   •https://shiganai.org
   

   View Slide

3. React
   A JavaScript library for building user interfaces

   https://reactjs.org/
   

   View Slide

4. ࠓ೔࿩͢͜ͱ
   •ReactΛcreate-react-appΛ࢖ͬͯ৮ͬͯΈΔ
   •จ๏΋ͬ͘͟Γ঺հ
   •ॳΊ·ͯ͠ͷޙͷτϐοΫ঺հ
   

   View Slide

5. React
   •JavaScriptͰUIΛॻͨ͘ΊͷϥΠϒϥϦ
   •͋͘·ͰUIͳͷͰϨϯμϦϯάઌ͸ԿͰ΋ྑ͍

   (ઐ༻ͷϥΠϒϥϦ͕ผʹ༻ҙ͞Ε͍ͯΔ)
   •DOM, Native, VR … Ի੠Λग़ྗ͍ͯ͠Δํ΋͍ͨΓ
   HTML, CSS
   iOS, Android
   VR
   etc…
   

   View Slide

6. ReactͷΠϝʔδ
   
   
   
   
   
   
   DOMͰ͸ͳ͍ཁૉͷू·ΓΛ
   JSX(ޙग़)Ͱॻ͘
   DOMͱͯ͠ϨϯμϦϯά
   

   View Slide

7. create-react-appʹΑΔReactͷ͸͡Ί͔ͨ
   •Node.jsΛΠϯετʔϧ (6.x ~)
   •create-react-app
   •$ npm install -g create-react-app
   •$ create-react-app { project name }
   •$ cd { project name }
   •$ npm start
   •※Babel
   •ECMAscript2015Ҏ߱ͷ΋ͷΛϒϥ΢βʔͰಈ͘΋ͷʹτϥϯεύΠϧ
   

   View Slide

8. View Slide

9. JSΛॻ͘
   

   View Slide

10. index.js
    ReactͰߏஙͨ͠Ծ૝తͳDOMπϦʔΛ

    DOMʹϨϯμϦϯά͍ͯ͠Δ
    

    View Slide

11. App.js
    JSX
    

    View Slide

12. JSX
    •React.createElement()ͷ౶ҥߏจ
    •ͳͲɺHTMLϥΠΫͳXMLͰهड़
    •classଐੑ͕classNameʹͳͬͨΓ
    •CSSΛJSΦϒδΣΫτͰॻ͍ͨΓ
    •React.render()ͱ͍͏Lifecycle MethodʹΑΓ

    มߋ͕React-DOMʹ௨஌ɺϨϯμϦϯά͞ΕΔ
    

    View Slide

13. App.js
    JSX
    

    View Slide

14. App.js
    ίϯϙʔωϯτ
    

    View Slide

15. ίϯϙʔωϯτπϦʔ
    
    
    
    
    
    ίϯϙʔωϯτͷπϦʔΛDOMʹϨϯμϦϯά
    

    View Slide

16. ίϯϙʔωϯτͱProps
    ଐੑΛܦ༝ͯ͠

    ஋ΛPropsͱͯ͠౉͢͜ͱ͕Ͱ͖Δ
    
    
    
    
    
    Props
    Props Props
    Props
    

    View Slide

17. State
    ʮDOM͸Stateͷ
    ࣸ૾Ͱ͋Δʯ
    

    View Slide

18. Stateͷมߋ
    stateͷมߋ͸setState()

    ϝιουܦ༝ͰͷΈՄೳ
    

    View Slide

19. Lifecycle Method
    •Componentʹ͸ଟ͘ͷLifecycle
    Method͕ੜ͍͑ͯΔ
    •Ұ౓ϨϯμϦϯά͞ΕΔͱɺ

    setState΍৽ͨͳProps͕਌͔ΒΘ
    ͨ͞ΕΔͳͲʹΑͬͯ

    දࣔ͢΂͖஋͕มߋͨ࣌͠

    ͳͲʹ͜ΕΒͷϝιου͕ൃՐ͢Δ
    cf: https://tylermcginnis.com/an-introduction-to-life-cycle-
    events-in-react-js/
    

    View Slide

20. Lifecycle Method
    cf: http://glassonion.hatenablog.com/entry/20120405/1333611664
    cf: http://glassonion.hatenablog.com/entry/20120405/1333611664
    

    View Slide

21. Lifecycle Method
    •componentWillMount
    •ίϯϙʔωϯτ͕DOMπϦʔʹ௥Ճ͞ΕΔ௚લʹ1౓͚ͩݺ͹ΕΔ
    •ॳճඳը௚લͷfetchAPIͷϦΫΤετ͸ͪ͜Β
    •componentDidMount
    •ίϯϙʔωϯτ͕DOMπϦʔʹ௥Ճ͞Εͨ௚ޙʹ1౓͚ͩݺ͹ΕΔ
    •componentWillUpdate
    •props΍state͕มߋ͞ΕDOMπϦʔʹ൓ө͞ΕΔ௚લʹຖճݺ͹ΕΔ
    •componentDidUpdate
    •props΍state͕มߋ͞ΕDOMπϦʔʹ൓ө͞Εͨ௚ޙʹຖճݺ͹ΕΔ
    •ଞʹ΋༻్Ԡͯ͡LifecycleϝιουΛ࢖͏͜ͱ͕Ͱ͖Δ
    •ύϑΥʔϚϯενϡʔχϯάͷͨΊͷ

    shouldComponentUpdate
    •props͕৽͘͠มΘΔ࣌ʹΞφ΢ϯεతʹ͔ͭ͏
    •componentWillRecieveProps
    

    View Slide

22. Lifecycle Method
    

    View Slide

23. ॳΊ·ͯ͠ͷޙʹ
    •Webpack, Babel
    •https://webpack.js.org/
    •https://babeljs.io
    •࠷৽ͷ࢓༷ͰJSΛ͔͍ͯϒϥ΢βʹରԠͤ͞Δ
    •Ұ౓webpack.config.jsΛ͔͍ͯݟΔͱྑ͍͔΋
    •TypeScript or FlowType
    •https://www.typescriptlang.org/
    •https://flow.org/
    •JavaScriptʹ͸ͳ͍ܕఆٛΛར༻Մೳ
    •React-router
    •https://reacttraining.com/react-router/
    •SPAͷ୉ޣຯɺϋογϡΠϕϯτʹΑΓݟͨ໨Λมߋv4Ͱͷഁյతมߋʹ஫ҙ
    •Redux
    •http://redux.js.org/
    •େن໛ͳstate؅ཧΛ͢ΔͷʹσʔλͷྲྀΕΛ1ຊԽɺ·ͣ͸middlewareͳ͠Ͱ
    •Immutable.js
    •https://facebook.github.io/immutable-js/
    •Reactͱ਌࿨ੑͷߴ͍ؔ਺ϥΠϒϥϦ
    

    View Slide

24. ·ͱΊ
    •React͸UIϥΠϒϥϦͰ͋Γɺ

    ఏڙ͞Ε͍ͯΔAPI͸͞΄Ͳଟ͘ͳ͍
    •Ұ౓֮͑Δͱٸʹָ͘͠ͳΔ
    •·ͣখ͘͞ॻ͍ͯΈΔʂSPA͚͕ͩReact׆༻
    ͡Όͳ͍ʂ
    •ٯʹݴ͏ͱଞͷϥΠϒϥϦͷબఆ͕ඞཁ
    •͜ͷ࿈ٳʹ৮ͬͯΈͯ͸͍͔͕Ͱ͠ΐ͏͔ʁ
    

    View Slide

25. એ఻
    •https://shiganai.org
    •OSCA͞Μ΋ग़ԋ͞Ε͍ͯ·͢
    •sp.6aʲήετ: OSCAʳָ͍͠SIerͷ৽OSରԠ
    •sp.6bʲήετ: OSCAʳָ͍͠ຊ൪؀ڥϖΞϦϦʔε
    

    View Slide