フロントエンドエンジニアが伝えたい最近の事情

2018-07-14 PHPカンファレンス関西

Transcript

1. ϑϩϯτΤϯυΤϯδχΞ͕఻͍͑ͨ࠷ۙͷࣄ৘ Mercari, Inc. Software Engineer Sota Ohara PHP Conference Kansai 2018
2. about me Sota Ohara / sottar Mercari, Inc. Software Engineer Web, JavaScript, React Sell, mercari NOW, CSTool @sottar_ sottar
3. ϑϩϯτΤϯυͷಈ޲ɺ௥͍ͬͯ·͔͢
4. ͔ͭͯͷϑϩϯτΤϯυ
5. ☺
6. ࠷ۙͷϑϩϯτΤϯυ
8. • JavaScript ࣗମͷ࿩͠ • ϑϩϯτΤϯυपΓͷ৭ʑͳτϨϯυͷ࿩͠ • ϑϩϯτΤϯυΤϯδχΞͱ͏·͘ڠۀ͢Δํ๏ ࠓ೔͸͜͏ݴͬͨ࿩͠Λ͠·͢
9. JavaScript ʹۤखҙࣝ͋Δ
10. ͍Ζ͍Ζ᠘͕࢓ֻ͚ΒΕ͍ͯΔ DBMMCBDL
    ஍ࠈͱ͔ ಈతͳܕม׵ͷڍಈ͕Θ͔Γʹ͍͘ͱ͔ VOEFpOFE
    ͱ
    OVMM
    ͱ͔ 
    ͳͷ͔
    
    ͳͷ͔ͱ͔ &$."4DSJQUͬͯͳΜͰ͔͢ͱ͔ ม਺ͷר্͖͛ͱ͔ UIJT
    ͕Α͘Θ͔Βͳ͍ͱ͔ QSPUPUZQF
    ͬͯͳʹͱ͔
11. JavaScript ͷ᠘̍ var hoge = ‘global’; function foo() { console.log(hoge); // global? local? if (true) { var hoge = ‘local’; console.log(hoge); // global? local? } } foo();
12. JavaScript ͷ᠘̍ var hoge = ‘global’; function foo() { console.log(hoge); // undefined if (true) { var hoge = ‘local’; console.log(hoge); // local } } foo();
13. JavaScript ͷ᠘̍ var hoge = ‘global’; function foo() { var hoge; console.log(hoge); // -> undefined if (true) { var hoge = ‘local’; console.log(hoge); // -> local } } foo(); ࣮ࡍͷΤϯδϯͰ͸͜͏͍͏ղऍʹͳΔ
    
    
    ม਺ͷר্͖͛
14. JavaScript ͷ᠘̎ var Person = function(name){ this.name = name; }; Person.prototype.sayName = function(){ console.log(this.name); // sottar? var hoge = function() { console.log(this.name); // sottar? }(); }; var sottar = new Person(‘sottar’) sottar.sayName();
15. JavaScript ͷ᠘̎ var Person = function(name){ this.name = name; }; Person.prototype.sayName = function(){ console.log(this.name); // sottar var hoge = function() { console.log(this.name); // undefined }(); }; var sottar = new Person(‘sottar’) sottar.sayName();
16. JavaScript ͷ᠘̎ var Person = function(name){ this.name = name; }; Person.prototype.sayName = function(){ console.log(this.name); // this -> Person var name = function() { console.log(this.name); // this -> Global Object }(); }; var sottar = new Person(‘sottar’) sottar.sayName(); UIJT
    ͷࢦ͍ͯ͠Δ΋ͷ͕ҟͳΔ
17. JavaScript ͷ᠘̏ '' == false; '' === false; 9 + '1'; 9 - '1'; null == undefined 0.1 + 0.2 == 0.3; . . .
18. JavaScript ͷ᠘̏ '' == false; // true '' === false; // false 9 + '1'; // '91' 9 - '1'; // 8 null == undefined // true 0.1 + 0.2 == 0.3; // false . . .
19. IUUQTUXJUUFSDPNDEFTJPTUBUVTQIPUP
20. ͜͏͍ͬͨ᠘Λճආ͢ΔͨΊͷ؀ڥ͸੔͍ͭͭ͋Δ
21. JavaScript ͷ᠘̍ var hoge = ‘global’; function foo() { console.log(hoge); // undefined if (true) { var hoge = ‘local’; console.log(hoge); // local } } foo(); ม਺ͷר্͖͛໰୊
22. ES2015 ͷ let ͔ const Λ࢖͏
23. JavaScript ͷ᠘̍ const hoge = ‘global’; function foo() { console.log(hoge); // global if (true) { const hoge = ‘local’; console.log(hoge); // local } } foo();
    
24. JavaScript ͷ᠘̎ var Person = function(name){ this.name = name; }; Person.prototype.sayName = function(){ console.log(this.name); // sottar var name = function() { console.log(this.name); // undefined }(); }; var sottar = new Person(‘sottar’) sottar.sayName(); UIJT
    ͷࢀরมΘΔ໰୊
25. ES2015 ͷΞϩʔؔ਺Λ࢖͏
26. JavaScript ͷ᠘̎ var Person = function(name){ this.name = name; }; Person.prototype.sayName = function(){ console.log(this.name); // sottar var hoge = () => { console.log(this.name); // sottar }; hoge(); }; var sottar = new Person(‘sottar’) sottar.sayName(); UIJT
    ͷର৅͕มߋ͞Εͳ͍
    
27. JavaScript ͷ᠘̏ '' == false; // true '' === false; // false 9 + '1'; // '91' 9 - '1'; // 8 null == undefined // true 0.1 + 0.2 == 0.3; // false . . . ܕม׵Α͘Θ͔Βͳ͍໰୊
28. ܕΛಋೖ͢Δ
29. FlowType or TypeScript
30. • ͲͪΒ΋ JavaScript ͷੈքʹܕΛ΋ͨΒ͢΋ͷ • FlowType ͸ Facebook੡ɺTypeScript ͸ Microsoft ੡ • React ͸ FlowType ΛಋೖɺAngular ͸ TypeScript Λಋೖ • Flowtype ͸ϓϩδΣΫτͷ్த͔Β΋ಋೖՄೳ FlowType or TypeScript
31. TypeScript ͷྫ IUUQTXXXUZQFTDSJQUMBOHPSHQMBZJOEFYIUNM
32. FlowType ͷྫ IUUQTqPXPSHUSZ
33. • ίʔϧόοΫ஍ࠈ => Promise, Async / Await • class ߏจ • Template literal, Spread operator, Destructuring assignment, import / export, Symbol ଞʹ΋͍Ζ͍Ζศརʹͳ͖͍ͬͯͯ·͢
34. class Λ࢖͏ͱ var Person = function(name){ this.name = name; }; Person.prototype.sayName = function(){ console.log(this.name); var name = function() { console.log(this.name); }(); }; var sottar = new Person(‘sottar’) sottar.sayName();
35. class Λ࢖͏ͱ class Person { constructor(name){ This.name = name; } sayName = () => { console.log(this.name); var name = () => { console.log(this.name); }; name(); } } const sottar = new Person(‘sottar’) sottar.sayName();
36. JavaScript ΋ਐԽ͍ͯ͠Δ
37. • JavaScriptࣗମͷ࿩͠ • ϑϩϯτΤϯυपΓͷ৭ʑͳτϨϯυͷ࿩͠ • ϑϩϯτΤϯυΤϯδχΞͱ͏·͘ڠۀ͢Δํ๏ ࠓ೔͸͜͏ݴͬͨ࿩͠Λ͠·͢
38. SPA, SSR, BFF
39. • Single Page Application ͷུ • ୯ҰϖʔδͰߏ੒͞ΕΔWebΞϓϦέʔγϣϯ • ϖʔδભҠΛߦΘͣʹ JavaScript Ͱ DOM Λૢ࡞ͯ͠ϖʔδΛ੾Γସ͑Δ • Routing ͸ϑϩϯτଆͰߦͬͯɺదٓɺඞཁͳ৘ใΛAPIͰऔಘɾૹ৴͢Δ SPAͱ͸
40. ैདྷͷΞϓϦέʔγϣϯ #SPXTFS 4FSWFS ᶃ
    Πϕϯτൃੜ
    ʢྫ͑͹ϖʔδભҠʣ ᶄ
    )551ϦΫΤετ ᶅ
    3PVUJOH
    )5.-ੜ੒ ᶆ
    )5.-
41. SPA #SPXTFS ᶅ
    "KBY ᶆ
    σʔλऔಘ ᶇ
    KTPO +4 ᶈ
    ը໘Λߋ৽ 4FSWFS ᶄ
    3PVUJOH ᶃ
    Πϕϯτൃੜ
    ʢྫ͑͹ϖʔδભҠʣ ʢඞཁʹԠͯ͡σʔλΛऔಘʣ
42. • ߴ଎ͳϖʔδભҠ • UXͷ޲্ • ։ൃɾӡ༻ίετ͕௿͍* SPA (Pros)
43. • ֶशίετߴ͍ • ॳճΞΫηε࣌ʹύϑΥʔϚϯε͕ѱ͍ • SEO ͕ෆ҆ఆ • OGPλά͕࢖͑ͳ͍ SPA (Cons)
44. ॳճΞΫηε࣌ #SPXTFS 4FSWFS 1BHF
    3FRVFTU ۭͷ
    )5.-
    ฦ͢ 3FOEFSJOH ॳճදࣔʹ͕͔͔࣌ؒΔʂʂ ෳ਺ϖʔδ෼ͷڊେͳ
    KT
    Λ
    ಡΈࠐΜͰ࣮ߦ͢Δ ඞཁʹԠͯ͡
    "1*
    ୟ͘
45. SEO ͕ෆ҆ఆɺOGPλά͕࢖͑ͳ͍
46. Ϋϩʔϥʔ͕ JavaScript Λղੳͯ͘͠Εͳ͍ͱ ۭͷϖʔδͩͱೝࣝ͞ΕΔ
47. • SEO ͕ෆ҆ఆ • جຊతʹ͸ google ͷΫϩʔϥʔ͸ JavaScript Λ࣮ߦͯ͘͠ΕΔ͕… SPA (Cons)
48. • OGPλά͕࢖͑ͳ͍ • Twitter ΍ facebook ͸ JavaScript Λղੳͯ͘͠Εͳ͍ SPA (Cons)
49. SSR
50. • Server Side Rendering ͷུ • Client ଆ ͰϨϯμϦϯά͢Δ͜ͱΛ Client Side Rendering ͱݺͿ • ͦΕʹରͯ͠ Server ଆ Ͱ΋ϨϯμϦϯά͢Δ͜ͱΛ Server Side Rendering ͱݺͿ • ॳճͷΞΫηεͷ͚࣌ͩ Server ଆͰ Rendering Λߦ͏ SSRͱ͸
51. #SPXTFS 4FSWFS "1*
    
    %# DPNQPOFOUT 3FOEFSJOH 3FOEFSJOH 3FOEFSJOH
    ޙͷ)5.- 1BHF
    3FRVFTU ॳճΞΫηε࣌ʢSSRʣ ॳճΞΫηεҎ߱͸
    41"
    ͱͯ͠
    ΫϥΠΞϯτଆͰϨϯμϦϯάΛߦ͏ ϑϩϯτͱαʔόʔͰಉ͡
    ϩδοΫͰ
    3FOEFSJOH
    Λߦ͏
52. • ✅ ॳճϨϯμϦϯά࣌ͷύϑΥʔϚϯε͕ѱ͍ • ✅ SEO ͕ෆ҆ఆ • ✅ OGPλά͕࢖͑ͳ͍ Server Side Rendering
53. BFF
54. • Backends for Frontends ͷུ BFFͱ͸ #SPXTFS #BDLFOET
    GPS
    'SPOUFOET %BUBCBTF "1* "1* %BUBCBTF "1*
55. ͳͥBFF͕ඞཁͳͷ͔
56. • ैདྷͷ web ΞϓϦέʔγϣϯ • HTMLςϯϓϨʔτͰදࣔ • ߋ৽͸ form ܥ • SPAతͳ web ΞϓϦέʔγϣϯ • ϖʔδ͝ͱʹඞཁͳ৘ใΛ Ajax Ͱऔಘ͢Δ • ಈ͖΋ Ajax Λ࢖ͬͯΠϯλϥΫςΟϒʹ • 1ϖʔδදࣔ͢ΔͷʹԿճ΋APIΛ౤͛Δͷ͸ύϑΥʔϚϯε্Α͘ͳ͍ • υϝΠϯ୯ҐͰ͸ͳ͘ϖʔδ΍ඞཁͳ৘ใ୯ҐͰΤϯυϙΠϯτΛ࡞Γ͍ͨ BFF͕ඞཁͳཧ༝
57. • ϖʔδΛͭ͘Δ৔ॴͱσʔλΛ؅ཧ͢Δ৔ॴΛ෼͚͍ͨ • σʔλΛ؅ཧ͢Δͱ͜Ζ͸αʔόʔαΠυͰ؅ཧʢRESTͳͲʣ • ϖʔδΛ࡞Δͱ͜Ζ͸ϑϩϯτΤϯυͰ؅ཧʢϖʔδ͝ͱʹඞཁͳ৘ใʣ BFF͕ඞཁͳཧ༝
58. BFFͱ͸ #SPXTFS %BUBCBTF "1* "1* %BUBCBTF #BDLFOET
    GPS
    'SPOUFOET "1* ϖʔδΛߏங͢Δ σʔλͷૢ࡞ɾ؅ཧ 'SPOUFOE 4FSWFS
    TJEF
59. ૄ݁߹ʹͳͬͯ੹຿Λ෼ׂͰ͖Δ
    
60. • JavaScriptࣗମͷ࿩͠ • ϑϩϯτΤϯυपΓͷ৭ʑͳτϨϯυͷ࿩͠ • ϑϩϯτΤϯυΤϯδχΞͱ͏·͘ڠۀ͢Δํ๏ ࠓ೔͸͜͏ݴͬͨ࿩͠Λ͠·͢
61. • ϑϩϯτΤϯυ͔Β΋࢖͍΍͍͢APIઃܭΛߦ͍͍ͨ • APIͷΤϯυϙΠϯτͱฦͬͯ͘ΔJSONͷத਎͕ܾ·ͬͪΌ͑͹ ͋ͱ͸෼ۀͰ͖Δ • ͭ·ΓઌʹAPIΛϑϩϯτΤϯυɺαʔόʔαΠυ྆ํͷࢹ఺Λ ࣋ͬͯఆٛ͢Δඞཁ͕͋Δ • Protocol Buffers, API blueprint, excel … ͏·͘ڠۀ͢Δʹ͸
62. IUUQTTXBHHFSJP
63. • The world’s most popular framework for APIs.ʢެࣜʣ • YAML or JSON Ͱ؅ཧՄೳ • REST API ͷઃܭ͔ΒυΩϡϝϯτԽɺςετɺσϓϩΠ·Ͱߦ ͏͜ͱ͕Ͱ͖Δ • APIఆٛ • Blueprint (ϞοΫ) • Codegen Swagger ͱ͸
64. • Swagger Editor • to design, define and document RESTful APIs in the Swagger Specification. • Swagger Codegen • to build server stubs and client SDKs directly from a Swagger defined RESTful API • Swagger UI • meant for consumption by JavaScript web projects that include module bundlers, such as Webpack, Browserify, and Rollup Swagger ͱ͸
65. • Swagger Editor • to design, define and document RESTful APIs in the Swagger Specification. • Swagger Codegen • to build server stubs and client SDKs directly from a Swagger defined RESTful API • Swagger UI • meant for consumption by JavaScript web projects that include module bundlers, such as Webpack, Browserify, and Rollup Swagger ͱ͸
66. Swagger Editor IUUQTFEJUPSTXBHHFSJP
67. Swagger Editor "1*ͷϕʔε63-
68. Swagger Editor εΩʔϚ
69. Swagger Editor "1*ͷύεɾ)551ϝιου
70. Swagger Editor CPEZ
    ͷఆٛ NPEFM
    Λࢀর͢Δ͜ͱ΋Ͱ͖Δ
71. Swagger Editor Ϩεϙϯε
72. ϞοΫαʔόʔ΋࡞ΕΔ
73. Swagger Editor
74. • JavaScript ͸ES2015Ͱ͔ͳΓਐԽ͠ɺ᠘΋ݮͬͨ • ͓ޓ͍ؾ࣋ͪΑ͘։ൃ͢ΔͨΊʹɺ࠷௿ݶͰ΋͓ޓ͍ͷ͜ͱΛ஌ͬ ͓ͯ͘͜ͱ͸େ੾ ·ͱΊ
75. Thank you