ブラウザ/ Browser

2023年度リクルート エンジニアコース新人研修の講義資料です

Transcript

1. Browser 2023/04/10 @ Recruit
2. Twitter: @yosuke_furukawa GitHub: yosuke-furukawa
3. Browser • ஌ͬͯΔΑ͏Ͱ஌Βͳ͍ • ΢ΣϒΞϓϦέʔγϣϯΛ࡞Δ࣌ʹඞͣ࢖͏ ΋ͷͷɺத਎͕Ͳ͏ͳͬͯΔ͔Λઆ໌ͯ͘͠ ͍ͩ͞ͱݴΘΕΔͱͲ͏ͨ͠Β͍͍͔Θ͔Β ͳ͍΋ͷ • ࠓճ͸ͦΜͳϒϥ΢βʹ৮ΕΑ͏ͱࢥ͍·͢
4. Browse + er ோΊΔ΋ͷ
5. ຊߨٛͷͶΒ͍ • օ͞Μʹϒϥ΢βͷத਎Λೝࣝͯ͠΋Β͍ɺ಄ͷதʹ ஍ਤΛ࡞ͬͯ΋Β͏ɻ • ϒϥ΢βͷ஍ਤΛ࡞্ͬͨͰ͜ͷ͋ͱͷߨٛʢύ ϑΥʔϚϯεɺηΩϡϦςΟɺJavaScript/ TypeScriptʣΛड͚ͯ΋Β͏͜ͱͰཧղ౓ΛਂΊΔɻ • HTTP/HTMLͳͲͷجૅతͳ෦෼͸ޙ൒ϋϯζΦϯͰ ;ΕΔɻ
6. લ൒ Agenda • ϒϥ΢βͷػೳ • ϒϥ΢βͷ࢓૊Έ • ϨϯμϦϯάΤϯδϯ • JavaScript Τϯδϯ • ωοτϫʔΫ • σʔλετϨʔδ
7. ϒϥ΢βͷػೳ
8. ϒϥ΢βͷػೳ 🔒
   IUUQTFYBNQMFDPN
9. ϒϥ΢βͷػೳ 🔒
   IUUQTFYBNQMFDPN ໭Δ ਐΉ Ϧϩʔυɾதࢭ ΞυϨεόʔ
10. ϒϥ΢βͷػೳ • ΞυϨεόʔʹ͍Εͨ URL Λجʹϖʔδ͕ϨϯμϦϯά͞ΕΔ • ϦϯΫΛΫϦοΫ͢ΔͳͲͷΞΫγϣϯ͕͋Δͱ URL ͕มԽ ͠ɺཤྺʹͨ·Δ • ໭ΔϘλϯΛԡ͢ͱཤྺΛ໭ΕΔ • ਐΉϘλϯΛԡ͢ͱཤྺΛਐΊΒΕΔ • ϦϩʔυϘλϯΛԡ͢ͱ࠶౓ URL Λߋ৽͢Δ *NBHF
11. ϒϥ΢βͷػೳ • ϒϥ΢βͷجຊػೳΛյ͢Α͏ͳΞϓϦέʔγϣϯ͸ମݧ͕ ѱ͍ɻ • ໭ͬͨ࣌ʹ΋ͱ΋ͱ͍ͨεΫϩʔϧҐஔ͡Όͳ͍৔ॴʹ໭͞ ΕͨΒɾɾɾɾʁ • εΫϩʔϧ͢ΔࡍʹΨλΨλͯ͠εϜʔεͳૢ࡞͕ग़དྷͳ ͔ͬͨΒɾɾʁ • Enter ΩʔͰૹ৴Ͱ͖ͳ͍ϑΥʔϜΛ࡞ͬͯ͠·ͬͨΒɾɾɾʁ
12. ϒϥ΢βͷػೳ • ϒϥ΢βͷجຊػೳΛյ͢Α͏ͳΞϓϦέʔγϣϯ͸ମݧ͕ ѱ͍ɻ • ໭ͬͨ࣌ʹ΋ͱ΋ͱ͍ͨεΫϩʔϧҐஔ͡Όͳ͍৔ॴʹ໭͞ ΕͨΒɾɾɾɾʁ • εΫϩʔϧ͢ΔࡍʹΨλΨλͯ͠εϜʔεͳૢ࡞͕ग़དྷͳ ͔ͬͨΒɾɾʁ • Enter ΩʔͰૹ৴Ͱ͖ͳ͍ϑΥʔϜΛ࡞ͬͯ͠·ͬͨΒɾɾɾʁ શ෦ѱ͍ϢʔβʔΤΫεϖϦΤϯε
13. ϒϥ΢βͷػೳ • େݪଇ: ΢ΣϒΞϓϦέʔγϣϯ͸ϒϥ΢βͷػೳΛ յͯ͠͸͍͚ͳ͍ɻ • յ͢ͱମݧ͕ѱ͍͚ͩ͡Όͳ͍ɻ • ΞΫηγϏϦςΟ΋ѱ͘ͳΔɻ • ηΩϡϦςΟͱ͔ͷอޢػߏ΋ಇ͔ͳ͘ͳΔ͔΋ɻ
14. ϒϥ΢βͷػೳ • େݪଇ: ΢ΣϒΞϓϦέʔγϣϯ͸ϒϥ΢βͷػೳΛ յͯ͠͸͍͚ͳ͍ɻ • յ͢ͱମݧ͕ѱ͍͚ͩ͡Όͳ͍ɻ • ΞΫηγϏϦςΟ΋ѱ͘ͳΔɻ • ηΩϡϦςΟͱ͔ͷอޢػߏ΋ಇ͔ͳ͘ͳΔ͔΋ɻ ͲΜͳʹྑ͍ΞϓϦͰ͋ͬͯ΋ 
 ϒϥ΢βͷػೳΛյ͢Α͏ͳΞϓϦ͸࢖ΘΕͳ͘ͳΔ
15. ϒϥ΢βͷ࢓૊Έ
16. ϒϥ΢βͷߏ଄ 6TFS
    *OUFSGBDF #SPXTFS
    &OHJOF 3FOEFSJOH
    &OHJOF /FUXPSL +BWB4DSJQU
    &OHJOF %BUB
    4UPSBHF
17. ϒϥ΢βͷߏ଄ 6TFS
    *OUFSGBDF #SPXTFS
    &OHJOF 3FOEFSJOH
    &OHJOF /FUXPSL +BWB4DSJQU
    &OHJOF %BUB
    4UPSBHF ϒϥ΢βͷΠϯλϑΣʔε
    ΞυϨεόʔͱ͔໭ΔϘλϯͱ͔
18. ϒϥ΢βͷߏ଄ 6TFS
    *OUFSGBDF #SPXTFS
    &OHJOF 3FOEFSJOH
    &OHJOF /FUXPSL +BWB4DSJQU
    &OHJOF %BUB
    4UPSBHF ϒϥ΢βͷ֩
    ޙͰ঺հ͢Δ༷ʑͳߏ੒ཁૉͱௐఀ͢Δ
19. ϒϥ΢βͷߏ଄ 6TFS
    *OUFSGBDF #SPXTFS
    &OHJOF 3FOEFSJOH
    &OHJOF /FUXPSL +BWB4DSJQU
    &OHJOF %BUB
    4UPSBHF ίϯςϯπͷඳըΛߦ͏ɻίϯςϯπ͕ )5.-ͳΒϖʔδΛύʔεͯ͠ϩʔυ͢Δ
20. ϒϥ΢βͷߏ଄ • ϨϯμϦϯάΤϯδϯ • HTML΍CSS͸ͦͷ··Ͱ͸ਓ͕ؒಡΊΔ΋ͷ ʹͳΒͳ͍ɻ • σʔλΛܭࢉ͠ɺਓ͕ؒݟ͑Δܗʹදݱ͢Δ ͜ͱΛϨϯμϦϯάͱݺͿ
21. ϒϥ΢βͷߏ଄ 6TFS
    *OUFSGBDF #SPXTFS
    &OHJOF 3FOEFSJOH
    &OHJOF /FUXPSL +BWB4DSJQU
    &OHJOF %BUB
    4UPSBHF ωοτϫʔΫ૚ɺ)551ϦΫΤετͨ͠ Γɺ)5514ͰϦΫΤετͨ͠Γ
22. ϒϥ΢βͷߏ଄ • ωοτϫʔΫ • HTML ΍ CSS ΍ JavaScript ͱ͍ͬͨίϯςϯπΛμ΢ϯϩʔυͨ͠ΓɺΞο ϓϩʔυ͢Δ࢓૊Έ • ϒϥ΢βͷσʔλަ׵ͷ࢓૊Έ͸ʮσʔλͷཁٻʢϦΫΤετʣʯͱʮཁٻ ʹରͯ͠ͷԠ౴ʢϨεϙϯεʣʯͱ͍͏̎ͭͷγϯϓϧͳ΍ΓऔΓʹΑͬͯ ߦΘΕ͍ͯΔ •
23. ϒϥ΢βͷߏ଄ 6TFS
    *OUFSGBDF #SPXTFS
    &OHJOF 3FOEFSJOH
    &OHJOF /FUXPSL +BWB4DSJQU
    &OHJOF %BUB
    4UPSBHF +BWB4DSJQU
    ࣮ߦΤϯδϯ
    W
    ͱ͔
    4QJEFS.POLFZ
    ͱ͔
    +4$
    ͱ͔
24. ϒϥ΢βͷߏ଄ • JavaScript Τϯδϯ • JavaScript ͸ίϯςϯπΛಈతʹมߋ͢Δͱ͍ͬͨඇৗʹॏཁͳॲཧΛߦ ͏෦෼ • ʮJust In Time ίϯύΠϥ(JITίϯύΠϥ)ʯͱݺ͹ΕΔಈతʹίʔυΛղ ੳ͢ΔࣄͰੑೳΛิ͍ͬͯΔ •
25. ϒϥ΢βͷߏ଄ 6TFS
    *OUFSGBDF #SPXTFS
    &OHJOF 3FOEFSJOH
    &OHJOF /FUXPSL +BWB4DSJQU
    &OHJOF %BUB
    4UPSBHF σΟεΫʹอଘ͢ΔϨΠϠ
    $PPLJF
    ͱ͔
    MPDBMTUPSBHF
    ͱ͔͕֘౰
26. ϒϥ΢βͷߏ଄ • σʔλετϨʔδ • σʔλΛӬଓతʹอଘ͢Δ෦෼ • ࣮͸ history ΋ cookie ΋ localstorage ΋શ෦ σʔλετϨʔδ෦෼ʹอଘ͞Ε͍ͯΔ
27. ϒϥ΢βͷߏ଄ • ͜ͷϚοϓΛུ֓ͱͯ͠಄ʹೖΕ͓͍ͯͯ΄͍͠ɻ • HTML/CSSΛ࣮ߦͯ͠Δ৔ॴ͕Ͳ͔͜ • JavaScript ͸Engine͕෼͔ΕͯΔͱ͔ • ωοτϫʔΫ෦෼ͰσʔλΛ͖͍࣋ͬͯͯΔͱ͔ • Cookie ͷσʔλΛอଘͯ͠Δͷ͸σʔλετϨʔδͱ͔
28. ϒϥ΢βͷྺ࢙
29. ϒϥ΢βͷྺ࢙ • ͍͖ͳΓ͜͏͍͏ߏ੒ཁૉʹͳͬͨΘ͚Ͱ͸ ͳ͍ɻ • ͜ͷߏ੒ཁૉʹͳΔ·Ͱʹḷͬͨྺ࢙ΛৼΓ ฦΔ͜ͱͰҰ୴ཧղΛਂΊΔ • ͱ͸͍͑ͨͩͷྺ࢙ͳͷͰɺ໾ʹཱͭ஌ࣝͱ ͍͏ΑΓ͸ʮ΁ʔʯͬͯฉ͍ͯͯ͘Εͯྑ͍
30. ࠷ॳظͷϒϥ΢β • WorldWideWebϒϥ΢β • Ұ൪࠷ॳͷϒϨΠΫεϧʔ͸ϋΠύʔςΩετͱΠϯ λʔωοτΛ૊Έ߹Θͤͨ͜ͱʹΑͬͯੜ·ΕΔɻ • ૊Έ߹Θͤͨਓ͸༗໊ͳςΟϜɾόʔφʔζɾϦʔ •
31. ࠷ॳظͷϒϥ΢β • WorldWideWeb • URLදࣔ΋ͳ͍ɺ໭ΔɾਐΉͱ͔ͷϘλϯ΋ ͳ͍
32. ࠷ॳظͷϒϥ΢β • WorldWideWeb 6TFS
    *OUFSGBDF #SPXTFS
    &OHJOF 3FOEFSJOH
    &OHJOF /FUXPSL %BUB
    4UPSBHF )5.- )551 )JTUPSZ
33. 1990೥୅: ϒϥ΢βઓ૪ • ͦͷதͰҰ൪ਓؾʹͳͬͨͷ͕ʮMosaicʯͱ͍͏ϒϥ΢β • ςΩετͱҰॹʹΠϯϥΠϯͰը૾Λදࣔ͢Δͱ͍͏ϒϨ ΠΫεϧʔΛىͨ͜͠ɻ •
34. 1990೥୅: ϒϥ΢βઓ૪ • จॻͷ಺༰ͱ૷০Λ෼͚ͯఆٛͰ͖ΔΑ͏ʹ͠Α͏ͱ͍͏ ํ਑ʹͳ͍ͬͯ͘ɻ • ࠷ॳظͷϒϥ΢β͸಺༰ͱ૷০͸෼͔Εͯͳ͔ͬͨɻ • CSS ͕஀ੜ͠ɺ࢓༷͕ਐΜͰ͍͘Α͏ʹͳΔɻ • ͜ͷࠒ͔Β HTML / CSS ͷଘࡏ͕Ͱ͖Δɻ
35. 1990೥୅: ϒϥ΢βઓ૪ • ϏοάΧϯύχʔ΋໧͍ͬͯͳ͍ɻ • IBM͕ WebExplorer Λ։ൃ͠ɺͦͷޙ Microsoft ͕ Internet Explorer Λ։ൃ͢Δɻ • Mosaic ͸ NetScape ձࣾΛ্ཱͪ͛ɺ Navigator ͱ͍͏໊ લͰ։ൃ͢Δɻ • ୈҰ࣍ϒϥ΢βઓ૪͕ຄൃ͢Δɻ
36. 1990೥୅: ϒϥ΢βઓ૪ • JavaScript ΋͜ͷࠒ͔Β։ൃ͞Εͩ͢ʢ1995೥ʣ • HTTP Cookie ͳͲͷ࢓૊Έ΋։ൃ͞ΕΔ • HTTPS ͳͲͷ҉߸Խͷ࢓૊Έ΋͜ͷࠒ͔Β •
37. 1990೥୅: ϒϥ΢βઓ૪ • 1990೥୅ޙ൒ʹ͸େମͷύʔπ͕ἧͬͯ͘Δ
38. 1990೥୅: ϒϥ΢βઓ૪ • ػೳͷ֦ॆ͕ਐΜͰ͍͘ҰํͰϒϥ΢βઓ૪͸൵ܶ΋΋ͨΒͨ͠ɻ • աܹͳࠩผԽͱػೳ֦ॆ͕ਐΉதͰಠ֦ࣗுʹ͸͠Δ͜ͱ΋૿͑ͯ ͍͘ • JScript ͱݺ͹ΕΔ΄ͱΜͲ JavaScript ͱಉ͡Α͏ͳػೳΛ࣋ͬͨ εΫϦϓτݴޠ͕ Internet Explorer ʹ࣮૷͞ΕΔ • JavaScript Ͱ Style ΛܾΊΒΕΔ JavaScript Style Sheet ΋ఏҊ͞ ΕΔ͕ɺ࢓༷ܾΊ͖Εͳ͍͏ͪʹऴΘΔͳͲɻ
39. 1990೥୅: ϒϥ΢βઓ૪ • ࠷ऴతʹୈҰ࣍ϒϥ΢βઓ૪͸Microsoft͕উར͢Δ • OSʹϒϥ΢β͕ಉࠝ͞ΕΔࣄͰ NetScape ͷϒϥ΢βΑΓ ΋Ϣʔβʔ਺Λ৳͹͠ɺՉ઎ঢ়ଶ͕࡞ΒΕͯ͠·͏ɻ • NetScape ଆ͸Ϣʔβʔ਺ͷ֫ಘʹ͸ࣦഊͨ͠΋ͷͷɺ OSS Խͯ͠ϒϥ΢βͷٕज़Λޙੈʹ࢒͠ɺ Mozilla ͱ͍͏ اۀʹܗΛม͑ͯଘଓ͢Δ
40. 2000೥୅: Google Chrome ͷ ొ৔ɺεϚʔτϑΥϯͷొ৔ • Mozilla ͕ຬΛ࣋ͯ͠ FireFox Λ։ൃͯ͠ɺϦϦʔε͢Δɻ • ࠓ·Ͱ Internet Explorer Ұڧঢ়ଶ͕ͩͬͨɺ࢓༷ʹ஧࣮Ͱ͋Γɺߴ଎ʹಈ͖ɺ λϒػೳ΍֦ுػೳΛඋ͑ͨ FireFox ͕Ϣʔβʔ਺Λൈ͘ • 2000೥୅ޙ൒ʹͳΔͱϓϨΠϠʔ͕มΘΔɻ • ·ͣ Google ͕ JavaScript ͱಈతͳ HTTP ϦΫΤετʢ͍ΘΏΔ Ajaxʣ Λ૊Έ ߹ΘͤΔࣄͰ͜Ε·ͰͷHTMLɺ CSSɺ JavaScript ͱ͍͏ٕज़͚ͩͰΠϯλϥΫ ςΟϒͳΞϓϦέʔγϣϯΛ΢Σϒ্Ͱ࡞ΕΔ͜ͱΛ࣮ફ͢Δɻ • ࣍ʹ Google ͕ Chrome ΛϦϦʔε͢Δɻ
41. 2000೥୅: Google Chrome ͷ ొ৔ɺεϚʔτϑΥϯͷొ৔ • 2000೥୅ͷલ൒͔Βޙ൒ʹ͔͚ͯى͖ͨͷ͸ɺ΢Σϒ্ͰΠϯλϥ ΫςΟϒͳΞϓϦέʔγϣϯΛ࡞Δͱ͍͏ٕज़తͳύϥμΠϜγϑτ • ϒϥ΢β্Ͱ JavaScript Λத৺ʹΞϓϦέʔγϣϯΛ࡞Δػձ͕૿͑ ͨɻ • ݁Ռͱͯ͠ɺΞϓϦέʔγϣϯͷ࣮ߦ଎౓ʹ௚݁͢Δ JavaScript ͷ࣮ ߦ؀ڥʹ΋ݟ௚͕͠ೖΔɻ • ֤ϒϥ΢βͷJavaScript Engineʹ JITίϯύΠϥ ͱݺ͹ΕΔ࣮ߦதʹ ࠷దԽ͢Δػೳ͕ಋೖ͞Ε͍ͯ͘
42. 2000೥୅: Google Chrome ͷ ొ৔ɺεϚʔτϑΥϯͷొ৔ • ϒϥ΢β͕୯ͳΔ΢ΣϒϖʔδͷӾཡ͚ͩͰ͸ͳ ͘ɺΞϓϦέʔγϣϯج൫ͱͯ͠ͷํ޲ʹਐΉɻ +*5
43. 2010೥୅: HTML5ϒʔϜͱε ϚʔτϑΥϯωΠςΟϒΞϓϦ • 2010೥͔Β͸ΞϓϦέʔγϣϯΛ΢ΣϒͰΑΓޮ ཰తʹɺ৽͘͠࡞Ζ͏ͱ͢ΔϒʔϜ͕౸དྷͨ͠ɻ • ϒϥ΢βʹ΋εϚʔτϑΥϯͰݟΕΔΞϓϦέʔ γϣϯΛ࡞ΔྲྀΕ͕౸དྷͨ͠ɻ • ͜ͷ͋ͨΓ͔ΒωΠςΟϒΞϓϦͱϒϥ΢β྆ํ Ͱಉ͡Α͏ͳػೳΛఏڙ͢ΔΑ͏ʹͳΔ
44. 2010೥୅: HTML5ϒʔϜͱε ϚʔτϑΥϯωΠςΟϒΞϓϦ • ΞϓϦέʔγϣϯͷ࡞Γํ͕ωΠςΟϒΞϓϦͷ࡞Γํʹۙ͘ͳͬͯ ͍ͬͨɻ • ΫϥΠΞϯτ಺Ͱ LocalStroage ΍ Session Stroage ͱ͍ͬͨΫϥΠΞ ϯτͷετϨʔδΛ࢖͓͏ͱͨ͠ΓɺΦϑϥΠϯͰ΋ಈ࡞͢ΔΑ͏ʹ ϒϥ΢β͕ਐԽ͍ͯͬͨ͠ɻ • ͜ͷࠒʹ Network ʹ΋ਐԽ͕๚ΕΔɻϒϥ΢β͕ར༻͢Δίϯςϯπ ͕ΑΓϦονʹͳΓɺΞϓϦέʔγϣϯ΋Ͱ͖Δ͜ͱ͕૿͍͑ͯ͘ͱɺ ωοτϫʔΫͷར༻཰্͕͕͍ͬͯ͘ • HTTP/2 ͱ͍ͬͨޮ཰తʹϦΫΤετ͢Δํ๏͕ग़ͯ͘Δɻ
45. 2010೥୅: HTML5ϒʔϜͱε ϚʔτϑΥϯωΠςΟϒΞϓϦ • ΑΓޮ཰తʹ࣮ߦͰ͖ΔΑ͏ʹɺΞϓϦέʔγϣϯ ΑΓͷػೳ͕૿͍͑ͯ͘ +*5 )551 MPDBMTUPSBHF
46. ϒϥ΢βྺ࢙·ͱΊ • ͜ͷΑ͏ʹΞϓϦέʔγϣϯΛ࡞Δํ๏͕֬ ཱ͞Ε͍ͯͬͨΓɺ৽͍ٕ͠ज़తͳస׵͕ى ͖Δͱͦͷ౎౓ϒϥ΢β͸ٕज़తͳਐԽΛ਱ ͖͛ͯͨɻ • ࠓ೔ͷϞμϯͳϒϥ΢β͸͜ͷΑ͏ͳٕज़త ਐԽ͕೔ਐ݄าͰߦΘΕ͍ͯΔɻ
47. ϒϥ΢βΛյͯ͠͸͍͚ͳ͍
48. HistoryΛյͯ͠͸͍͚ͳ͍ • ϒϥ΢βͷػೳʹ͸ʮ໭ΔʯͱʮਐΉʯͱ͍ͬͨӾཡཤྺΛલʹ ໭͠ɺਐΊΔػೳ͕͋Δɻ • Ӿཡཤྺ͸ཤྺͰ͋Γɺ໭ΔΛԡͨ͠ͱ͖ʹ͸جຊతʹલͷঢ়ଶ ʹ໭Δ͜ͱ͕๬·͍͠ɻ • ͔͠͠ͳ͕Βɺ͍͔ͭ͘ͷ΢ΣϒΞϓϦέʔγϣϯͰ͸ɺʮ໭ ΔʯΛԡͨ࣌͠ʹ໭Εͳ͍ΞϓϦέʔγϣϯ͕ଘࡏ͢Δɻ • ΋͘͠͸໭Ζ͏ͱͨ࣌͠ʹҰ෦ͷঢ়ଶ͚ͩ໭͢͜ͱ͕Ͱ͖Δ͕ɺ ׬શʹલͷঢ়ଶΛ࠶ݱͰ͖ͳ͍ΞϓϦέʔγϣϯ΋ଘࡏ͢Δɻ
49. HistoryΛյͯ͠͸͍͚ͳ͍ • ௚લʹߦͬͨίϝϯτ͕ফ͑ͯΔྫ
50. HistoryΛյͯ͠͸͍͚ͳ͍ • ໭ΔϘλϯ͕ແޮʹͳ͍ͬͯΔྫ
51. εΫϩʔϧΛյͯ͠͸͍͚ͳ͍ • ը໘ΛεΫϩʔϧ͢Δ͜ͱʹΑͬͯΨλΨλͱ ࢥͬͨҐஔʹεΫϩʔϧͰ͖ͳ͍ࣄ͕͋Δɻ • ͜ͷεΫϩʔϧͷΨλπΩͷ͜ͱΛʮεΫϩʔ ϧδϟϯΫʯͱݺͿɻ •
52. εΫϩʔϧΛյͯ͠͸͍͚ͳ͍ • εΫϩʔϧҐஔ͕໭Βͳ͍ྫ
53. ϑΥʔϜΛյͯ͠͸͍͚ͳ͍ • λϒͰભҠͰ͖ͳ͍ • ΤϯλʔΩʔͰૹ৴Ͱ͖ͳ͍
54. ϨϯμϦϯάΤϯδϯ
55. ϨϯμϦϯάΤϯδϯ • ίϯςϯπʢHTMLͳͲ) Λड͚औͬͯ಺༰Λ ඳը͢Δ HTML ϖʔδ ϨϯμϦϯά
56. ϨϯμϦϯάΤϯδϯ • ίϯςϯπʢHTMLͳͲ) Λड͚औͬͯ಺༰Λ ඳը͢Δ HTML ϖʔδ ϨϯμϦϯά ͜͜ʹࢸΔ·ͰʹυϥϚ͕ͨ͘͞Μ͋Δɻ
57. ϨϯμϦϯάΤϯδϯ • ࢦఆ͞ΕͨίϯςϯπΛඳը͢Δ΋ͷ • ͜͜Ͱ͸ओʹ HTML Λඳը͢Δ࣌ͷྲྀΕͰղ આ͢Δ͕ɺຊདྷ͸ HTML ʹґΒͣɺίϯςϯ πΛඳը͢Δɻ (SBQIJD
    *OUFSGBDF 3FOEFS
58. ϨϯμϦϯάΤϯδϯ • ࢦఆ͞ΕͨίϯςϯπΛඳը͢Δ΋ͷ • ͜͜Ͱ͸ओʹ HTML Λඳը͢Δ࣌ͷྲྀΕͰղ આ͢Δ͕ɺຊདྷ͸ HTML ʹґΒͣɺίϯςϯ πΛඳը͢Δɻ (SBQIJD
    *OUFSGBDF 3FOEFS ಛʹ͜͜ΛਂງΓ͢Δ
59. ϨϯμϦϯάϓϩηε • HTML ͷϨϯμϦϯά͸ "ಈతʹ" ϨϯμϦϯ ά͢Δɻ • JavaScript ΍ϢʔβʔೖྗɺΞχϝʔγϣϯ ͳͲͰϨϯμϦϯά͕ߋ৽͞ΕΔɻ *OJUJBM
    3FOEFS ߋ৽ ߋ৽ ߋ৽ ߋ৽
60. ϨϯμϦϯάϓϩηε • ίϯςϯπ͕ಈతʹߋ৽͞ΕΔͱ͍͏͜ͱ͕ ΢Σϒͷಛ௃ • ͦͷͨΊʹ͍͔ͭ͘ͷதؒදݱΛ͍࣋ͬͯΔ IUNM
    IUNM %0. 4UZMFE 1BSTF 4UZMF -BZPVU 
 1BJOU
61. HTML Parse EJW
    Q
    IFMMP
    Q
    Q
    XPSME
    Q
    EJW 1BSTF %*7 
 1
    5&95
    1 5SFF %PDVNFOU )5.- #PEZ %JW 1 5&95 1 5&95 • λάΛωετͯ͠දݱ • ໦ߏ଄ͱ͍͏ܗͰσʔλߏ଄ͱͯ͠ 
 දݱ͞ΕΔɻ
62. DOM %PDVNFOU )5.- #PEZ %JW 1 5&95 1 5&95 • Document Object Model • ϒϥ΢β಺ͰͷHTMLͷ಺෦දݱ • ͔ͭ JavaScript Ͱૢ࡞Ͱ͖Δσʔλߏ଄ var div = document.body. fi rstChild; var p2 = div.childNodes[1]; p2.appendChild(document.createElement("span")); +BWB4DSJQU
    &OHJOF CJOEJOHT
63. Style • DOM Λ࡞ͬͨΒͦΕʹ Style Λ ౰͍ͯͯ͘ • %PDVNFOU )5.- #PEZ %JW 1 5&95 1 5&95 p { color: red } IFMMP
    XPSME 4UZMF
64. Style • ΍Δ͜ͱ͸େ͖͘෼͚ͯ̎ͭ • ηϨΫλϚονϯά • ΧεέʔσΟϯά
65. Style • ηϨΫλ • ελΠϧΛ౰ͯΔࡍͷ௚઀తͳϧʔϧΛهड़ ͯ͠಺༰ΛؚΊͨ΋ͷ p { color: red; } #test { border: red 2px solid; } .foo { background-color: skyblue; }
66. Style • CSS (Cascading Style Sheets) • ηϨΫλΛෳࡶʹࢦఆͰ͖Δ 
 ͪͳΈʹෳࡶͳࢦఆΛ͢Ε͹͢Δ΄Ͳෳࡶͳܭࢉ͕ඞཁͳͷͰ஗͍ɻ • ηϨΫλ͸ඃΔ͜ͱ͕͋Δ • ඃͬͨΒৄࡉ౓Ͱܾ·Δ EJWOPU GPP
    
    QOUIPGUZQF O
    \
    
    
    DPMPS
    SFE
    ^
    Q
    \
    
    
    DPMPS
    CMVF
    ^
67. Style • ηϨΫλϚονϯά • ֤ཁૉͷCSSͷηϨΫλΛҰͭҰͭݟ͍ͯͬͯελΠϧΛ൓ө͢Δ • Πϝʔδͱͯ͠͸ΞϯέʔτೖྗϑΥʔϜʹ͍ۙ • .BSHJO 'POU $PMPS 1BEEJOH ✔ ✔ 255,255,255,0 top: 20px left: ✔family: serif bottom: style: size: top: left: bottom:
68. Style • CSS ৄࡉ౓ (ڧ͍ॱͷྫ) • styleଐੑͰͷࢦఆ • ηϨΫλͷ ID ͷ਺ • ηϨΫλͷଐੑͷ਺ • ηϨΫλͷཁૉ໊ͷ਺
    
    
    
    
    
    
    
    
    
    
    
    
    
    \^
    
    
    B
    C
    D
    E
    
    TQFDJ fi DJUZ
    
       
    
    
    MJ
    
    
    
    
    
    
    
    
    
    
    
    \^
    
    
    B
    C
    D
    E
    
    TQFDJ fi DJUZ
    
       
    
    
    MJ fi STUMJOF
    \^
    
    
    B
    C
    D
    E
    
    TQFDJ fi DJUZ
    
       
    
    
    VM
    MJ
    
    
    
    
    
    
    
    
    \^
    
    
    B
    C
    D
    E
    
    TQFDJ fi DJUZ
    
       
    
    
    VM
    PM MJ
    
    
    
    
    
    \^
    
    
    B
    C
    D
    E
    
    TQFDJ fi DJUZ
    
       
    
    
    I
    
    <SFMVQ>\^
    
    
    B
    C
    D
    E
    
    TQFDJ fi DJUZ
    
       
    
    
    VM
    PM
    MJSFE
    
    \^
    
    
    B
    C
    D
    E
    
    TQFDJ fi DJUZ
    
       
    
    
    MJSFEMFWFM
    
    \^
    
    
    B
    C
    D
    E
    
    TQFDJ fi DJUZ
    
       
    
    
    YZ
    
    
    
    
    
    
    
    
    \^
    
    
    B
    C
    D
    E
    
    TQFDJ fi DJUZ
    
       
    
    
    TUZMF
    
    
    
    
    
    
    
    
    
    
    B
    C
    D
    E
    
    TQFDJ fi DJUZ
    
       
    
    http://taligarsiel.com/Projects/howbrowserswork1.htm#Speci fi ty
69. Style • ΧεέʔσΟϯά • ΞϯέʔτೖྗϑΥʔϜͷதͰۭཝΛݟ͚ͭͯิ͏ॲཧ • ਌ͷཁૉ͕͍࣋ͬͯͨΒࢠʹద༻͍ͯ͘͠ • .BSHJO 'POU $PMPS 1BEEJOH ✔ ✔ 255,255,255,0 top: 20px left: ✔family: serif bottom: style: size: top: left: bottom: ຒ·ͬͯͳ͍ͱ͜ΖΛνΣοΫ .BSHJO 'POU $PMPS 1BEEJOH ✔ ✔ 255,255,255,0 top: 20px left: 20px ✔family: serif bottom: 30px style: normal size: 10 top: 20px left: 20px bottom: 20px ✔ ✔ ✔ ✔ ✔ ✔ ✔ ਌͔Β΋Β͑Δͱ͜Ζ͸आΓͯ͘Δ
70. Style EJWOPU GPP
    
    QOUIPGUZQF O
    \
    
    
    DPMPS
    SFE
    ^
    Q
    \
    
    
    DPMPS
    CMVF
    ^ 1BSTF3VMF 4UZMF
    3VMFT 4UZMF
    3VMFT 4UZMF
    3VMFT $44΋ύʔε͠ɺελΠϧͷϧʔϧηοτΛ࡞Δɻ
71. Style %PDVNFOU )5.- #PEZ %JW 1 5&95 1 5&95 4UZMF
    3VMFT 4UZMF
    3VMFT 4UZMF
    3VMFT %PDVNFOU )5.- #PEZ %JW 1 5&95 1 5&95 $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT
72. Style %PDVNFOU )5.- #PEZ %JW 1 5&95 1 5&95 4UZMF
    3VMFT 4UZMF
    3VMFT 4UZMF
    3VMFT %PDVNFOU )5.- #PEZ %JW 1 5&95 1 5&95 $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT ϧʔϧΛ
    %0.
    ʹద༻ͯ͠
    $PNQVUFE
    4UZMF
    Λ࡞Δ
73. Style %PDVNFOU )5.- #PEZ %JW 1 5&95 1 5&95 $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMFT $PNQVUFE
    4UZMF
    \
    
    
    GPOU8FJHIU
    
    
    
    
    NBSHJO-FGU
    
     

    
    PVUMJOF
    
     

    
    USBOTGPSN
    
    
    
    
    CBDLHSPVOE
    
    
    ^ ϑΥϯτ΍എܠͳͲͷελΠϧ৘ใΛ%0.ʹ෇༩͢Δ
74. Layout • ҰͭҰͭͷཁૉ͸ελΠϧΛ΋͍ͬͯͯ΋ɺͦ Ε͕Ͳ͜ʹ഑ஔ͞ΕΔ͔ɺͲΕ͘Β͍ͷαΠζ ͳͷ͔ɺͱ͍͏৔ॴͷ৘ใ͸͍࣋ͬͯͳ͍ɻ • HTMLͷߏ଄ͱ Style ͷ৘ใΛجʹ৔ॴͱαΠζ Λܭࢉ͢Δॲཧ͕ Layout • ਌͔Β࠶ؼతʹḷͬͯ Layout ॲཧΛߦ͏
75. Layout • ਌͔ΒࢠͲ΋ʹ࠶ؼతʹܭࢉΛ ͍ͯ͘͠ • ࢠͲ΋ͷߴ͞ɾ෯Λܭࢉͨ͠Β ਌͸ࢠͲ΋ͷྦྷੵ͞Εͨߴ͞ɾ ෯ͱࣗ෼ࣗ਎ͷߴ͞ɾ෯ʹϚʔ δϯΛՃ͑ͯߴ͞Λܭࢉ͢Δ %PDVNFOU )5.- #PEZ %JW 1 5&95 1 5&95 ߴ͞ɾ෯ɾҐஔΛܭࢉ
76. Paint • ඳը͢ΔҐஔͱαΠζ͕ܾ·ͬͨޙɺͲͷॱ ൪Ͱඳը͢Δ͔ΛܾΊΔॲཧ • DOMͷॱংͰ͸ͳ͘ɺޙΖ͔ΒલʹͪΌΜͱ ඳը͠ͳ͍ͱࢥͬͨͱ͓ΓʹϨϯμϦϯά͞ Εͳ͍ɻ CBDLHSPVOE fl PBUJOH GPSFHSPVOE PVUMJOF
77. Paint • DOMͷཁૉͷॱ൪Ͱ͸ͳ͘ɺ z-index ౳Λ ࢖ͬͯޙΖͷཁૉͱલͷཁૉΛೖΕସ͑Δ͜ ͱ͕Ͱ͖Δɻ <div class="yellow"></div> <div class="green"></div> <style> .yellow { z-index: 2; ... } .green { z-index: 1; ... } </style>
78. Composite & Render • Ͱ͖͕͋ͬͨ΋ͷΛඞཁͳ෦෼͚ͩඳը͢ΔΑ͏ʹ Ωϟϓνϟʔͯ͠άϥϑΟοΫϥΠϒϥϦʹ౉͢ • Πϝʔδͱͯ͠͸શ෦ܭࢉ͠ऴΘͬͯϨΠΞ΢τ΋ऴ ΘͬͯલܠͱഎܠऴΘͬͨͷͰɺͦΕΛҰຕͷϓϦϯ τ͢ΔࣸਅʹऔΔΈ͍ͨͳΠϝʔδ • (SBQIJD
    *OUFSGBDF
79. ΍ͬͪΌ͍͚ͳ͍͜ͱ • document.write() ͱݺ͹ΕΔAPIΛ࢖Θͳ͍ • DOMͷߋ৽ස౓Λଟ͘͠ͳ͍
80. document.write()Λ࢖Θͳ͍ )5.- %0. 4UZMF -BZPVU EPDVNFOUXSJUF EPDVNFOUHFU&MFNFOU#Z*E 
 FMFNUFYU$POUFOU
    
    
81. document.write()Λ࢖Θͳ͍ )5.- %0. 4UZMF -BZPVU EPDVNFOUXSJUF EPDVNFOUHFU&MFNFOU#Z*E 
 FMFNUFYU$POUFOU
    
     EPDVNFOUXSJUF
    ࣗ਎͸௚ײతͰศར͕ͩɺ࣮͸)5.-͔Βࠩ ͠ସ͑ͯ͠·͏ɺͦͷͨΊɺࠓ·Ͱͷ
    %0.
    
    4UZMF
    
    -BZPVU
    ͷྲྀΕ͕΍Γ௚͠ʹͳΔɻ࢖͏΂͖Ͱ͸ͳ͍ɻ
82. DOMͷߋ৽ස౓Λଟ͘͠ͳ͍ const ul = document.createElement("ul"); for (let i=0;i<10000;i++) { // ϧʔϓ಺Ͱຖճ append ͠ͳ͍ɻ let li = document.createElement("li"); li.textContent = "test" + i; ul.appendChild(li); }
83. DOMͷߋ৽ස౓Λଟ͘͠ͳ͍ EPDVNFOU IUNM CPEZ VM BQQFOE GPS
    MFU
    JJJ
    \
    
    
    MFU
    MJ
    
    EPDVNFOUDSFBUF&MFNFOU MJ 
    
    
    MJUFYU$POUFOU
    
    UFTU
    
    J
    
    
    VMBQQFOE$IJME MJ 
    ^
    4UZMF -BZPVU1BJOU MJ 4UZMF -BZPVU1BJOU MJ 4UZMF -BZPVU1BJOU MJ 4UZMF -BZPVU1BJOU MJ ࢠཁૉ͕௥Ճ͞ΕΔ౓ʹStyleॲཧ͕ಈ͘
84. DOMͷߋ৽ස౓Λଟ͘͠ͳ͍ const ul = document.getElementById("foo"); const fr = document.createDocumentFragment(); for (let i =0;i <100000;i++) { let li = document.createElement("li"); i.textContent = `${i}`; // fragment ʹରͯ͠ೖΕ͓ͯ͘ fr.appendChild(li); } ul.appendChild(fr);
85. DOMͷߋ৽ස౓Λଟ͘͠ͳ͍ EPDVNFOU IUNM CPEZ VM BQQFOE MFU
    VM
    
    EPDVNFOUHFU&MFNFOU#Z*E GPP 
    MFU
    GS
    
    EPDVNFOUDSFBUF%PDVNFOU'SBHNFOU 
    GPS
    MFU
    J
    J
    J
    \
    
    
    MFU
    MJ
    
    EPDVNFOUDSFBUF&MFNFOU MJ 
    
    JUFYU$POUFOU
    
    A\J^A
    
    
    GSBQQFOE$IJME MJ 
    ^
    VMBQQFOE$IJME GS 
    Ұ୴ϑϥάϝϯτΛ࡞͔ͬͯΒ·ͱΊͯ ௥ه͢ΔɻҰ౓͚͔ͩ͠Styleॲཧ͸૸Βͳ͍ MJ MJ MJ MJ 4UZMF -BZPVU1BJOU
86. ϨϯμϦϯάΤϯδϯ·ͱΊ • HTML͸ಈతʹߋ৽͞ΕΔϞσϧ • ಈతʹߋ৽͢ΔͨΊʹதؒදݱͱͯ͠ DOM Λ༻ҙ͓ͯ͠Γɺ JavaScript Ͱߋ৽ Ͱ͖Δ • DOMʹม׵ͨ͠ޙɺ Style Λܭࢉ͠ɺͦͷޙͲͷϙδγϣϯʹཁૉΛஔ͔͘ͱ͍ ͏ Layout Λܭࢉ͢Δ • ࠷ޙʹ Paint Ͱલ໘ʹஔ͔͘എ໘ʹஔ͔͘ΛܾΊͯඳը͢Δ • document.write() ͸࢖Θͳ͍ • DOMͷߋ৽ස౓Λଟ͘͠ͳ͍
87. JavaScript Τϯδϯ
88. JavaScript Τϯδϯ • JavaScript Λ࣮ߦ͢ΔΤϯδϯ • ࠷ۙͷΤϯδϯ͸େମ Just In Time ίϯύΠϥ͕͍ͭ ͓ͯΓɺ୯ͳΔΠϯλϓϦλͰ͸ͳ͘ɺ౷ܭతʹঢ়گ Λݟͯߴ଎Խ͞ΕΔ • ͜͜Ͱ͸ུ֓Λղઆ͠ɺΤϯδϯͷؾ࣋ͪΛ஌Δɻ • ͪͳΈʹ৘ใ͕ଟ͍ v8 ͷΤϯδϯΛࢀߟʹ͍ͯ͠Δɻ
89. ͬ͘͟Γ֓ཁͱͯ͠ͷಈ͖ GVODUJPO
    TVN B
    C
    \
    
    
    SFUVSO
    B
    
    C
    ^
    TVN 
      ύʔαʔ ΠϯλϓϦλ +*5
    ίϯύΠϥ JavaScript ந৅ߏจ໦    
    &
    YDBBFDBF
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    $SFBUF6ONBQQFE"SHVNFOUT
    
    
    
    
    
    
    
    
    
    YDBBFDBG
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    4
    YDBBFDC
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    S
    <>
    <>
    όΠτίʔυ ػցޠ ౷ܭ৘ใ ࠷దԽ ୤࠷దԽ
90. JavaScript Τϯδϯ • JavaScriptͷධՁ • ϝϞϦ؅ཧ • Πϕϯτϧʔϓ
91. JavaScriptͷධՁ • ύʔαʔ • ΠϯλϓϦλ • JITίϯύΠϥ
92. ύʔαʔ GVODUJPO
    TVN B
    C
    \
    
    
    SFUVSO
    B
    
    C
    ^
    TVN 
      <GVODUJPO LFZXPSE >
    <TVN JEFOUJ fi FS >
    <
    QBSFO >
    <B
    JEFOUJ fi FS >
    <C
    JEFOUJ fi FS > UPLFOJ[F "45 <GVODUJPO LFZXPSE >
    <TVN JEFOUJ fi FS >
    <
    QBSFO >
    <B
    JEFOUJ fi FS >
    <C
    JEFOUJ fi FS > 1SPHSBN 'VODUJPO%FDMBSBUJPO *EFOUJ fi FS
    TVN QBSBNT
    *EFOUJ fi FS
    C
    *EFOUJ fi FS
    B
    
93. ύʔαʔ GVODUJPO
    TVN B
    C
    \
    
    
    SFUVSO
    B
    
    C
    ^
    TVN 
      <GVODUJPO LFZXPSE >
    <TVN JEFOUJ fi FS >
    <
    QBSFO >
    <B
    JEFOUJ fi FS >
    <C
    JEFOUJ fi FS > UPLFOJ[F "45 <GVODUJPO LFZXPSE >
    <TVN JEFOUJ fi FS >
    <
    QBSFO >
    <B
    JEFOUJ fi FS >
    <C
    JEFOUJ fi FS > 1SPHSBN 'VODUJPO%FDMBSBUJPO *EFOUJ fi FS
    TVN QBSBNT
    *EFOUJ fi FS
    C
    *EFOUJ fi FS
    B
    +BWB4DSJQU
    ΋͜Ε·Ͱͱಉ༷໦ߏ଄Ͱද͞ΕΔɻ
    "CTUSBDU
    4ZOUBY
    5SFF
    ͱ͍͏ߏ଄ɻ
94. ΠϯλʔϓϦλ 1SPHSBN 'VODUJPO%FDMBSBUJPO *EFOUJ fi FS
    TVN QBSBNT
    *EFOUJ fi FS
    C
    *EFOUJ fi FS
    B
    *OUFSQSFUFS 
    &
    YDBBFDBF
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    $SFBUF6ONBQQFE"SHVNFOUT
    
    
    
    
    
    
    
    
    
    YDBBFDBG
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    4
    YDBBFDC
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    S
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDC
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    
    
    
    
    
    
    
    
    YDBBFDC
    !
    
    
    
    
    
    C
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB;FSP
    
    &
    YDBBFDC
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    5FTU&RVBM4USJDU
    S
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDCC
    !
    
    
    
    
    B
    
    
    
    
    
    
    
    
    
    
    
    
    
    +VNQ*G'BMTF
    <>
    YDBBFDE
    !
    
    
    4
    YDBBFDCE
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    UIJT
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDD
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    
    
    
    
    
    
    
    
    YDBBFDD
    !
    
    
    
    
    C
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB;FSP
    
    
    
    
    
    
    
    
    
    YDBBFDD
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    &
    YDBBFDD
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    UIJT
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDDB
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    &
    YDBBFDDD
    !
    
    
    
    
    B
    G
    
    G
    G
    
    $BMM1SPQFSUZ
    S
    UIJT
    S
    S
    <>
    
    4
    YDBBFDE
    !
    
    
    
    
    BB
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    3FUVSO
    
    4
    YDBBFDE
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    UIJT
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDE
    !
    
    
    
    
    
    GC
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    4
    YDBBFDE
    !
    
    
    
    
    C
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB;FSP
    
    &
    YDBBFDEB
    !
    
    
    
    
    C
    
    C
    
    
    
    
    
    
    
    
    
    5FTU-FTT5IBO0S&RVBM
    B
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDEE
    !
    
    
    
    
    B
    
    
    
    
    
    
    
    
    
    
    
    
    
    +VNQ*G'BMTF
    <>
    YDBBFDF
    !
    
    
    4
    YDBBFDEG
    !
    
    
    
    
    C
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB;FSP
    
    
    
    
    
    
    
    
    
    YDBBFDF
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    B
    
    
    
    
    
    
    
    
    
    YDBBFDF
    !
    
    
    
    
    C
    
    
    
    
    
    
    
    
    
    
    
    
    
    +VNQ
    <>
    YDBBFDG
    !
    
    
    4
    YDBBFDF
    !
    
    
    
    
    
    GC
    
    
    
    
    
    
    
    
    
    
    
    
    -EBS
    S
    
    &
    YDBBFDF
    !
    
    
    
    
    D
    
    D
    
    
    
    
    
    
    
    
    
    5FTU(SFBUFS5IBO0S&RVBM
    B
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDF
    !
    
    
    
    
    B
    
    
    
    
    
    
    
    
    
    
    
    
    
    +VNQ*G'BMTF
    <>
    YDBBFDFF
    !
    
    "45
    ͔Β
    CZUFDPEF
    ʹ্ͨ͠Ͱ࣮ߦ͢Δɻ 
    3FTVMU
    
95. JITίϯύΠϥ *OUFSQSFUFS +*5ίϯύΠϥ 
    &
    YDBBFDBF
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    $SFBUF6ONBQQFE"SHVNFOUT
    
    
    
    
    
    
    
    
    
    YDBBFDBG
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    4
    YDBBFDC
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    S
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDC
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    
    
    
    
    
    
    
    
    YDBBFDC
    !
    
    
    
    
    
    C
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB;FSP
    
    &
    YDBBFDC
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    5FTU&RVBM4USJDU
    S
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDCC
    !
    
    
    
    
    B
    
    
    
    
    
    
    
    
    
    
    
    
    
    +VNQ*G'BMTF
    <>
    YDBBFDE
    !
    
    
    4
    YDBBFDCE
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    UIJT
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDD
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    
    
    
    
    
    
    
    
    YDBBFDD
    !
    
    
    
    
    C
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB;FSP
    
    
    
    
    
    
    
    
    
    YDBBFDD
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    &
    YDBBFDD
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    UIJT
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDDB
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    &
    YDBBFDDD
    !
    
    
    
    
    B
    G
    
    G
    G
    
    $BMM1SPQFSUZ
    S
    UIJT
    S
    S
    <>
    
    4
    YDBBFDE
    !
    
    
    
    
    BB
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    3FUVSO
    
    4
    YDBBFDE
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    UIJT
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDE
    !
    
    
    
    
    
    GC
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
         bytecode Optimized machine code Optimize Deoptimize
96. JITίϯύΠϥ *OUFSQSFUFS 
    &
    YDBBFDBF
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    $SFBUF6ONBQQFE"SHVNFOUT
    
    
    
    
    
    
    
    
    
    YDBBFDBG
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    4
    YDBBFDC
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    S
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDC
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    
    
    
    
    
    
    
    
    YDBBFDC
    !
    
    
    
    
    
    C
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB;FSP
    
    &
    YDBBFDC
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    5FTU&RVBM4USJDU
    S
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDCC
    !
    
    
    
    
    B
    
    
    
    
    
    
    
    
    
    
    
    
    
    +VNQ*G'BMTF
    <>
    YDBBFDE
    !
    
    
    4
    YDBBFDCE
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    UIJT
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDD
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    
    
    
    
    
    
    
    
    YDBBFDD
    !
    
    
    
    
    C
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB;FSP
    
    
    
    
    
    
    
    
    
    YDBBFDD
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    &
    YDBBFDD
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    UIJT
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDDB
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    &
    YDBBFDDD
    !
    
    
    
    
    B
    G
    
    G
    G
    
    $BMM1SPQFSUZ
    S
    UIJT
    S
    S
    <>
    
    4
    YDBBFDE
    !
    
    
    
    
    BB
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    3FUVSO
    
    4
    YDBBFDE
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    UIJT
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDE
    !
    
    
    
    
    
    GC
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
         bytecode Optimized machine code Optimize Deoptimize *OUFSQSFUFS
    ͷ࣮ߦ࣌৘ใΛجʹ
    +*5
    $PNQJMFS
    Ͱ࠷దԽ͢Δ +*5ίϯύΠϥ
97. JIT ίϯύΠϥ *OUFSQSFUFS 
    &
    YDBBFDBF
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    $SFBUF6ONBQQFE"SHVNFOUT
    
    
    
    
    
    
    
    
    
    YDBBFDBG
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    4
    YDBBFDC
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    S
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDC
    !
    
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    
    
    
    
    
    
    
    
    YDBBFDC
    !
    
    
    
    
    
    C
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB;FSP
    
    &
    YDBBFDC
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    5FTU&RVBM4USJDU
    S
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDCC
    !
    
    
    
    
    B
    
    
    
    
    
    
    
    
    
    
    
    
    
    +VNQ*G'BMTF
    <>
    YDBBFDE
    !
    
    
    4
    YDBBFDCE
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    UIJT
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDD
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    
    
    
    
    
    
    
    
    YDBBFDD
    !
    
    
    
    
    C
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB;FSP
    
    
    
    
    
    
    
    
    
    YDBBFDD
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    &
    YDBBFDD
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    UIJT
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDDB
    !
    
    
    
    
    
    G
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
    
    &
    YDBBFDDD
    !
    
    
    
    
    B
    G
    
    G
    G
    
    $BMM1SPQFSUZ
    S
    UIJT
    S
    S
    <>
    
    4
    YDBBFDE
    !
    
    
    
    
    BB
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    3FUVSO
    
    4
    YDBBFDE
    !
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    -EB/BNFE1SPQFSUZ
    UIJT
    <>
    <>
    
    
    
    
    
    
    
    
    
    YDBBFDE
    !
    
    
    
    
    
    GC
    
    
    
    
    
    
    
    
    
    
    
    
    4UBS
    S
         bytecode Optimized machine code Optimize Deoptimize ΋͠΋ਪఆ஋͕֎Ε͍ͯͨΒඇ࠷దԽ͕૸Δɻ +*5ίϯύΠϥ
98. JIT ίϯύΠϥ GVODUJPO
    TVN B
    C
    \
    
    
    SFUVSO
    B
    
    C
    ^
    
    ਺ࣈΛ଍ؔ͢਺
    TVN 
      Կ౓΋਺ࣈΛ଍͠߹Θ͓͚ͤͯ͹ɺ
    TVN
    ؔ਺ͷ Ҿ਺͸਺ࣈɺಛʹ
    JOUFHFS
    CJU
    Ґ͔͕Θ͔Δ
    ͦ͏͢Ε͹ɺػցޠʹ͢Δ࣌ʹ࠷దԽ͕Ͱ͖Δɻ
99. JIT ίϯύΠϥ GVODUJPO
    TVN B
    C
    \
    
    
    SFUVSO
    B
    
    C
    ^
    
    ਺ࣈΛ଍ؔ͢਺
    TVN 
      Կ౓΋਺ࣈΛ଍͠߹Θ͓͚ͤͯ͹ɺ
    TVN
    ؔ਺ͷ Ҿ਺͸਺ࣈɺಛʹ
    JOUFHFS
    CJU
    Ґ͔͕Θ͔Δ
    ͦ͏͢Ε͹ɺػցޠʹ͢Δ࣌ʹ࠷దԽ͕Ͱ͖Δɻ ͜Ε͕
    +*5ίϯύΠϥͰݴ͏ͱ͜Ζͷ࠷దԽॲཧ
100. JIT ίϯύΠϥ GVODUJPO
     TVN B
     C
     \
     
     
     SFUVSO
     B
     
     C
     ^
     
     ਺ࣈΛ଍ؔ͢਺
     TVN 
       Կ౓΋਺ࣈΛ଍͠߹Θ͓͚ͤͯ͹ɺ
     TVN
     ؔ਺ͷ Ҿ਺͸਺ࣈɺಛʹ
     JOUFHFS
     CJU
     Ґ͔͕Θ͔Δ
     ͦ͏͢Ε͹ɺػցޠʹ͢Δ࣌ʹ࠷దԽ͕Ͱ͖Δɻ GVODUJPO
     TVN B
     C
     \
     
     
     SFUVSO
     B
     
     C
     ^
     
     ͍͖ͳΓ͜͜ͰจࣈྻΛ଍͢
     TVN 
       ࠷దԽ͞ΕͨॴͰจࣈྻΛҾ਺ʹ౉ͨ͠ΒͲ͏ͳ Δ͔ʁ
101. JIT ίϯύΠϥ GVODUJPO
     TVN B
     C
     \
     
     
     SFUVSO
     B
     
     C
     ^
     
     ਺ࣈΛ଍ؔ͢਺
     TVN 
       Կ౓΋਺ࣈΛ଍͠߹Θ͓͚ͤͯ͹ɺ
     TVN
     ؔ਺ͷ Ҿ਺͸਺ࣈɺಛʹ
     JOUFHFS
     CJU
     Ґ͔͕Θ͔Δ
     ͦ͏͢Ε͹ɺػցޠʹ͢Δ࣌ʹ࠷దԽ͕Ͱ͖Δɻ GVODUJPO
     TVN B
     C
     \
     
     
     SFUVSO
     B
     
     C
     ^
     
     ͍͖ͳΓ͜͜ͰจࣈྻΛ଍͢
     TVN 
       ࠷దԽ͞ΕͨॴͰจࣈྻΛҾ਺ʹ౉ͨ͠ΒͲ͏ͳ Δ͔ʁ CZUFDPEF͔Β΍Γ௚͢͜ͱʹͳΔʢඇ࠷దԽ͕૸Δʣɻ 
 ͔ͤͬ͘+*5Ͱ࠷దԽͨ͠ॲཧ͕ແବʹͳΔɻ
102. JIT Λࡴ͢ཁҼҰཡ (v8) • ܕ৘ใͷෆҰக • not int32 (integer ͡Όͳ͔ͬͨ) • not a string (จࣈྻ͡Όͳ͔ͬͨ) • not an array index (഑ྻͷఴࣈ͡Ό ͳ͔ͬͨ) • etc https://github.com/v8/v8/blob/master/src/deoptimizer/deoptimize-reason.h • ༧ظͤ͵ૢ࡞ • cow array's elements changed 
 (ίϐʔͨ͠഑ྻ͕มߋ͞Εͨ) • division by zero (θϩআࢉ) • Out of bounds (഑ྻͷൣғ௒͑) • etc
103. JIT Λࡴ͢ཁҼҰཡ (v8) • ܕ৘ใͷෆҰக • not int32 (integer ͡Όͳ͔ͬͨ) • not a string (จࣈྻ͡Όͳ͔ͬͨ) • not an array index (഑ྻͷఴࣈ͡Ό ͳ͔ͬͨ) • etc https://github.com/v8/v8/blob/master/src/deoptimizer/deoptimize-reason.h • ༧ظͤ͵ૢ࡞ • cow array's elements changed 
 (ίϐʔͨ͠഑ྻ͕มߋ͞Εͨ) • division by zero (θϩআࢉ) • Out of bounds (഑ྻͷൣғ௒͑) • etc ֮͑Δඞཁ͸ͳ͍͕ɺॻ࣌͘ʹʮԿΛ͠ͳ͍ํ͕͍͍͔ʯΛ ஌͓͍ͬͯͨ΄͏͕ྑ͍ɻ
104. JavaScript ͷϝϞϦ؅ཧ • جຊతʹԿ͔͠ΒͷΦϒδΣΫτΛ࡞ͬͨΒ ϝϞϦ͕֬อ͞ΕΔ • ϝϞϦʹೖ͍ͬͯΔΦϒδΣΫτ͸͍Βͳ͘ ͳͬͨΒ࡟আ͞ΕΔ • ͦͷಈ͖ʹ͍ͭͯղઆ͢Δ
105. ώʔϓྖҬ Ψϕʔδί ϨΫλ ࢖͍ͬͯͳ͍෺Λ ݟ͚ͭͯճऩ͢Δ JavaScriptΨϕʔδίϨΫγϣϯ
106. ϚʔΫΞϯυεΠʔϓ SPPU ✔ ✔ ✔ ✔ ✔ ✔ ✔ ౸ୡෆՄೳ 
 => ճऩՄೳ ౸ୡՄೳ 
 => ੜ͖ͯΔՄೳੑ͕ߴ͍
107. SPPU ຊདྷෆཁ͕ͩ root ͔Β 
 ౸ୡՄೳͳॴʹ͋Δ ϚʔΫΞϯυεΠʔϓ
108. SPPU ຊདྷෆཁ͕ͩ root ͔Β 
 ౸ୡՄೳͳॴʹ͋Δ ϚʔΫΞϯυεΠʔϓ ͜ͷঢ়گ͕ϝϞϦϦʔΫͱݺ͹ΕΔঢ়گ
109. Πϕϯτϧʔϓ • JavaScript ʹ͸ಉظతͳॲཧͱඇಉظతͳॲཧͷ2छྨ ͕ଘࡏ͢Δɻ • ୯७ͳԋࢉͳΒಉظతͳॲཧʹ౰ͨΔ • HTTPϦΫΤετ΍λΠϚʔʹΑΔॲཧ͸ඇಉظతͳॲཧ ʹ౰ͨΔ • ඇಉظతͳॲཧͱಉظతͳॲཧΛ࣮ࠞͥͯߦ͢ΔͨΊͷ ػߏ͕ΠϕϯτϧʔϓͰ͋Δ
110. Πϕϯτϧʔϓɹ
111. Πϕϯτϧʔϓ • ಉظతͳॲཧͷ৔߹
112. Πϕϯτϧʔϓ • ඇಉظతͳॲཧͷ৔߹
113. Πϕϯτϧʔϓ • ඇಉظతͳॲཧͷ৔߹
114. ωοτϫʔΫ
115. ωοτϫʔΫ • ௨৴Λߦ͍ɺཁٻ͞ΕͨίϯςϯπΛμ΢ϯ ϩʔυͨ͠Γɺ·ͨσʔλΛΞοϓϩʔυ͠ ͨΓ͢Δɻ • HTTP(S)௨৴Λߦ͏ϨΠϠͰɺۙ೥͸ HTTP/3 ͳͲ͕༗ޮʹͳΓͭͭ͋Δɻ
116. ωοτϫʔΫ
117. ωοτϫʔΫ • URLΛೖྗ͔ͯ͠Βϖʔδ͕දࣔ͞ΕΔ·ͰͷྲྀΕ
118. URL • εΩʔϜ: ϦΫΤετૹ৴͢ΔࡍͷϓϩτίϧΛࢦఆ͢Δཁૉɺ http ΍ https ͳͲͷϓ ϩτίϧͷ໊લΛهड़͢Δɻ • υϝΠϯ໊: ެ։͞Ε͍ͯΔϗετͷॅॴΛࣔ͢ཁૉ • ϙʔτ: υϝΠϯ಺ͷϦιʔεʹΞΫηε͢ΔͨΊͷ൪߸ɺ80 (HTTP) ΍ 443 (HTTPS) ͳͲ • ύε: υϝΠϯ಺ͷϦιʔεͷ৔ॴ • ύϥϝʔλ: `?` ͔Β࢝·ΔɺϦιʔεʹରͯ͠औಘ΍ߋ৽ͳͲͷૢ࡞Λ͢Δ࣌ʹΫϥΠ Ξϯτ͔Βࢦఆͯ͠αʔόʹ౉͢͜ͱͰɺಛผͳॲཧΛͤ͞Δ͜ͱ͕Ͱ͖Δɻ • ΞϯΧʔ: `#` ͔Β࢝·ΔɻϦιʔε಺෦ͷίϯςϯπͷҐஔΛࢦ͢ɻ
119. ͦ΋ͦ΋௨৴Λߦ͏ͱ͸ʁ • Public IP / PORT ΛΫϥΠΞϯτ͕஌͍ͬͯͯ • αʔό͕઀ଓΛ଴͍ͬͯͯ • ͦ͜ʹ઀ଓΛཁٻ͠ • ઀ଓΛཱ֬ͨ͠Βɺσʔλͷަ׵Λߦ͏ Public IP / PORT Listen Data Transfer
120. DNS໊લղܾ • υϝΠϯωʔϜΛIPΞυϨεʹม׵͢Δ
121. DNS໊લղܾ • IP ͸ DNSαʔό͔Βڭ͑ͯ΋Β͏ɻ • https://example.com ʹΞΫηε͠Α͏ͱͨ͠৔߹ɺҰ౓΋ΞΫηε͞Εͯͳ͔ͬͨΒ DNS Lookup (໊લ͔ΒIPΞυϨεΛҾ͘ߦҝ)͕ߦΘΕΔɻ • DNS Lookup ͸ͦͷϦΫΤετઌͷυϝΠϯʹԠͯ͡౎౓ൃੜ͢ΔͷͰɺ 3rd party domain ͕ϖʔδ಺ʹ͋Δ৔߹͸ʢҰ౓΋๚໰͞Εͯͳ͔ͬͨΒʣͦͷ࣌఺Ͱൃੜ͢ Δɻ 
     EJH
     FYBNQMFDPN
     
     015
     14&6%04&$5*0/
     
     &%/4
     WFSTJPO
     
     fl BHT
     VEQ
     
     
     26&45*0/
     4&$5*0/
     FYBNQMFDPN
     
     
     */
     "
     
     "/48&3
     4&$5*0/
     FYBNQMFDPN
     
     
     */
     "
     
122. PORT ͸ʁ • ༗໊ͳϓϩτίϧͷ৔߹༧Ίܾ·ͬͯΔɻ • http ͳΒ 80 ൪ɺ https ͳΒ 443 ൪ͱ͍ͬͨ෩ʹɻ • ͜ͷ༧ΊܾΊΒΕͨ PORT ͷ͜ͱΛ well-known PORT ͱݺͿɻ • well-known ͳ PORT ͸ಛݖ͕ඞཁͳέʔε΋ଟ͍ͷͰɺ։ൃ؀ ڥ౳Ͱ͸ 3000 ൪ͱ͔ʹͯ͠ɺ localhost:3000 Ͱݺͼग़͢͜ͱ ΋ଟ͍ɻ
123. ઀ଓΛཱ֬ͱ͍͏ͷ͸ʁ • (؆ུԽͷͨΊ) TCP Λϕʔεʹ࿩͢ͱɺ֘౰ͷαʔόʹ͍͖ͳ Γ઀ଓ͢ΔͷͰ͸ͳ͘ɺ3ճͷ઀ଓ֬ೝΛܦͯ઀ଓ͢Δɻ • ͜ͷ઀ଓ֬ೝͷ͜ͱΛ 3 way handshake ͱݺͿɻ ͭͳ͛ΔΑʔ (SYN) ͍͍Αʔ ͬͪ͜΋ͭͳ͛ΔΑʔ(SYN-ACK) ͡Ό͋ͭͳ͙Ͷʔ (ACK)
124. ͡Ό͋ࢲͷ伴ͱ߹Θͤͯ͜ΕͰ࿩͠·͠ΐ͏ɻ 
 (Client Certi fi cate) ઀ଓΛཱ֬ͱ͍͏ͷ͸ʁ • HTTP ͳΒ͜ΕͰܨ͕Δ͕ɺ࠷ۙͷେମͷWebαʔό͸ HTTPS ͳ ͷͰɺ͜Ε͚ͩͰ͸ܨ͕Βͳ͍ɻ҉߸ԽͷͨΊͷ΍ΓऔΓ͕ߋʹ ߦΘΕΔɻ(※؆ུԽ͍ͯ͠ΔͨΊɺਖ਼֬Ͱ͸ͳ͍) ΑΖ͓͘͠ئ͍͍ͨ͠·͢ɻ(Client Hello) ͪ͜Βͦ͜ΑΖ͓͘͠Ͷ͕͍͠·͢ɻ (Server Hello) Θͨ͠͸͜͏͍͏΋ͷͰ͢ɻ (Server Certi fi cate) ͜͏͍͏伴Ͱ࿩ͤ·͢ (Server Key Exchange) Θͨ͠͸͜͏͍͏΋ͷͰ͢ɻ(Client Certi fi cate)
125. ͡Ό͋ࢲͷ伴ͱ߹Θͤͯ͜ΕͰ࿩͠·͠ΐ͏ɻ 
 (Client Certi fi cate) ઀ଓΛཱ֬ͱ͍͏ͷ͸ʁ • HTTP ͳΒ͜ΕͰܨ͕Δ͕ɺ࠷ۙͷେମͷWebαʔό͸ HTTPS ͳ ͷͰɺ͜Ε͚ͩͰ͸ܨ͕Βͳ͍ɻ҉߸ԽͷͨΊͷ΍ΓऔΓ͕ߋʹ ߦΘΕΔɻ(※؆ུԽ͍ͯ͠ΔͨΊɺਖ਼֬Ͱ͸ͳ͍) ΑΖ͓͘͠ئ͍͍ͨ͠·͢ɻ(Client Hello) ͪ͜Βͦ͜ΑΖ͓͘͠Ͷ͕͍͠·͢ɻ (Server Hello) Θͨ͠͸͜͏͍͏΋ͷͰ͢ɻ (Server Certi fi cate) ͜͏͍͏伴Ͱ࿩ͤ·͢ (Server Key Exchange) Θͨ͠͸͜͏͍͏΋ͷͰ͢ɻ(Client Certi fi cate) )5514
     ௨৴͸
     5$1
     ͷ΍ΓऔΓͷޙͰ҉߸ԽͷͨΊͷऔΓܾ ΊΛ͢Δεςοϓ͕͋ΔɻͦΕΛܦͯ઀ଓ͞ΕΔɻ
126. ؓ࿩ٳ୊ TLS/1.3 • TLS/1.3 Ͱ͸࠷ॳͷ઀ଓ࣌ʹϥ΢ϯυτϦοϓΛݮΒ͢ࢼΈΛ͍ͯ͠Δɻ • 0-RTT ͱݺ͹ΕΔ࢓૊ΈͰ͸͍͖ͳΓ Client ͕ Hello Λඈ͹ͯ͠σʔλΛ ૹΔ͜ͱ΋Մೳʹɻ Making the web faster with HTTP/3 by kazuho 
 https://vimeo.com/485450984
127. σʔλͷ΍ΓऔΓ • ઀ଓཱ͕֬͞Εͨޙ͸ HTTP ϓϩτίϧʹΑΔσʔλͷ΍ΓऔΓΛߦ͏ɻ • HTTP ͸جຊతʹϦΫΤετ / ϨεϙϯεͰͷ΍ΓऔΓ͕ߦΘΕΔɻ • HTTP ϦΫΤετʹ͸ϦΫΤετߦͱϔομʔͱݺ͹ΕΔϝλ৘ใͱϘσΟ ͱݺ͹ΕΔίϯςϯτ৘ใؚ͕·ΕΔɻ(※ ؆ུԽͷͨΊHTTP/1.1ͷղઆ) • 1045
     JOEFYIUNM
     )551 
 BDDFQU
     UFYUIUNM
     BDDFQUFODPEJOH
     H[JQ
     EF fl BUF
     CS
     BDDFQUMBOHVBHF
     FO64 FOR KBR 
 DBDIFDPOUSPM
     OPDBDIF
     DPPLJFGPPCBSCB[
     
 GPPCBSIPHFGVHB ϦΫΤετߦ ϦΫΤετϔομʔ ϦΫΤετϘσΟ σʔλ಺༰
128. σʔλͷ΍ΓऔΓ • ϦΫΤετΛड͚औͬͨΒαʔό͸ϨεϙϯεʢԠ౴ʣΛฦ͢ • HTTP Ϩεϙϯεʹ͸εςʔλεΛද͢৘ใͱϨεϙϯεϔομ ʢϝλσʔλʣɺϨεϙϯεϘσΟʢ಺༰ʣؚ͕·ΕΔ )551
     
     0,
     "HF
     
     $BDIF$POUSPM
     NBYBHF
     $POUFOU5ZQF
     UFYUIUNM
     DIBSTFU65'
     %BUF
     .PO
     
     "QS
     
     
     (.5
     $POUFOU-FOHUI
     
     EPDUZQF
     IUNM
     IUNM
     IFBE
      εςʔλεߦ Ϩεϙϯεϔομ ϨεϙϯεϘσΟ
129. ίϯςϯτ ϔομϑΟʔϧυ τϨʔϥʔϑΟʔϧυ ίϯςϯτ ϔομϑΟʔϧυ τϨʔϥʔϑΟʔϧυ ։࢝ߦ HTTP/1.1 HTTP/2, HTTP/3
130. σʔλͷ΍ΓऔΓ • 200ܥ: ੒ޭɺσʔλͷຊମ͕͋Ε͹ૹΔ • 300ܥ: ϦμΠϨΫγϣϯϝοηʔδ • 400ܥ: ΫϥΠΞϯτΤϥʔ • 500ܥ: αʔόΤϥʔ
131. 4FSWFS GET /main.css GET /main.js GET /image0.png σʔλͷ΍ΓऔΓ GET /index.html 200 OK 200 OK 404 Not Found 304 Not Modi fi ed
132. 4FSWFS GET /main.css GET /main.js GET /image0.png σʔλͷ΍ΓऔΓ GET /index.html 200 OK 200 OK 404 Not Found 304 Not Modi fi ed )551্Ͱσʔλͷ΍ΓऔΓ͕ߦΘΕɺͦΕ͕ϨϯμϦϯάϓ ϩηε΍+4Τϯδϯ͕࣮ߦ͞ΕΔϑΣʔζΛܦͯϖʔδ͕ग़Δ
133. 4FSWFS ͪͳΈʹ
     )551
     
     ͷ৔߹ɺΫϥΠΞϯτ͔ Βαʔόʹ͸࠷େ઀ଓ·Ͱ͔͠ૹΕͳ͍ɻ σʔλͷ΍ΓऔΓ
134. 4FSWFS ҰݸͰ΋஗͍ͱղܾ͞ΕΔ·Ͱ͔ͭ͠࢖͑ͳ͍ σʔλͷ΍ΓऔΓ
135. 4FSWFS )551
     ͩͱͭͷίωΫγϣϯ ͷதͰଟॏԽͯ͠ૹΔɻ σʔλͷ΍ΓऔΓ
136. 4FSWFS )551
     ͩͱͭͷίωΫγϣϯ ͷதͰଟॏԽͯ͠ૹΔɻ σʔλͷ΍ΓऔΓ ͖ͬ͞ͷ
     5$1
     )BOETIBLF
     d
     5-4
     ઀ଓཱ֬·Ͱ͕ 
 Ұճ͚ͩʹͳΔɻޮ཰తɻ
137. σʔλͷ΍ΓऔΓ: HTTP/3 • HTTP/2 Ͱ઀ଓίετͷ௿ݮ͕Ͱ͖͕ͨ໰୊΋͋Δɻ • ωοτϫʔΫ઀ଓ͕ෆ҆ఆͳ৔߹ TCP ઀ଓʹΑΓɺ͢΂ͯͷίωΫ γϣϯ͕ղܾ·Ͱʹ଴ͨ͞ΕΔέʔε͕༗Δɻཁ͸ύέϩεʹऑ͍ɻ • 4FSWFS 5$1ͷϨΠϠͰෆ੔߹͕͋Δͱෆ੔߹͕గਖ਼͞Ε Δ·Ͱશମ͕ϒϩοΫ͞ΕΔɻ
138. TCP͓͞Β͍ • TCP ͸৴པੑ͕ߴ͍ϓϩτίϧ • ύέϩε࣌ͷ࠶ૹ੍ޚ΍ॱং౸ୡ੍ޚͳͲɺసૹ࣌ͷ໰୊Λղ ܾͯ͘͠ΕΔɻ 4FSWFS 
     ) 
     & 
     - 
     "DL 
     & "DL͕དྷ ͳ͍
     ࠶ૹ͢Δ 
     "DL ͕དྷ͚ͨͲͦΕ ·Ͱड৴ͨ͠΋ͷ ͸ഁغ͢ΔͶɻ 
     - ͔Β΋ ͏Ұ౓࠶
139. HTTP/3 • UDP ্ʹϓϩτίϧΛ࡞͍ͬͯΔ • TCPͷޡΓగਖ਼ͳͲͷ࢓૊ΈΛࣗ෼ͨͪͷϨΠϠ্Ͱ࠶࣮૷ 4FSWFS 
     ) 
     & 
     - ͕དྷͯͳ͍Α ̐
     &
     ඞཁͳ ΋ͷͷΈ ࠶ૹ Λ࢒ͨ͠· ·͕དྷͨ͜ ͱʹ͢Δ
140. σʔλͷ΍ΓऔΓ: HTTP/3 • HTTP/3 Ͱ͸͜ͷ࢓૊ΈʹΑΓɺ઀ଓ಺Ͱͷσʔλෆ੔߹͕ ൃੜͯ͠΋શମΛετοϓͤͣ͞ʹ֘౰ͷετϦʔϜͷΈగ ਖ਼ͤ͞Δɻ • 4FSWFS Ұ෦ͷετϦʔϜ͕ࢭ·ͬͯ΋શମʹӨڹ͕ग़ͳ ͍࢓૊Έ
141. HTTP/3 ʹ͍ͭͯ • ผࢴࢀর
142. σʔλετϨʔδ
143. σʔλετϨʔδ • Ϩεϙϯεͷ৘ใ(Cache)΍Ϣʔβʔͷ৘ใ (Cookie, Localstorage etc)ΛϋʔυσΟεΫʹ ஝ੵ͓ͯ͘͠৔ॴ • σʔλετϨʔδʹσʔλΛஔ͍͓ͯ͘͜ͱ ͰσʔλΛӬଓԽͨ͠Γɺ Cache ʹΑΔ࠷ద ԽΛߦ͏͜ͱ͕Ͱ͖Δ
144. Cache Storage • ϨεϙϯεΛΩϟογϡ͢Δ࢓૊Έ 4FSWFS GET /main.css GET /main.js GET /image0.png GET /index.html 200 OK 200 OK 404 Not Found 304 Not Modi fi ed Ұճμ΢ϯϩʔυͨ͠ϑΝΠϧ͸ωοτϫʔΫ͔ΒಡΈࠐΈͨ ͘ͳ͍ɻ࠶ར༻͍ͨ͠ɻ
145. Cache Storage • αʔόଆ͕ HTTP ϨεϙϯεϔομʹΩϟογϡͱ͠ ͯอଘͯ͠ྑ͍͔Ͳ͏͔/Ωϟογϡ༗ޮظؒΛࣔͤ͹ Ωϟογϡ͕༗ޮʹͳΔɻ • Cache-Control / ETag ͱ͍ͬͨΩϟογϡ༻ͷϔομ Λ׆༻͢Δɻ $BDIF$POUSPM
     NBYBHF
     
     
     ඵؒɺ
     ΫϥΠΞϯτͷ
     $BDIF
     ͱ ͯ͠༗ޮ
     &UBH
      JEFOU
     
     σʔλͷࣝผՄೳͳ஋ɺ&UBH஋͕มΘͬͯ ͍ͳ͍͔Ͳ͏͔Λαʔόʹ໰͍߹ΘͤͯมΘ͍ͬͯͳ͔ͬͨΒΩϟογϡ͕ ࢖ΘΕΔɻมΘ͍ͬͯͨΒ࠶μ΢ϯϩʔυ
     
146. Cookie Storage • ΫϥΠΞϯτ಺ͷσʔλͱͯ͠อଘ͞Εɺϒϥ΢β͔Β αʔόʹຖճϦΫΤετ͕ૹ৴͞ΕΔɻ • ओʹҎԼͷΑ͏ͳ༻్Ͱ࢖ΘΕΔɻ • ηογϣϯ؅ཧʢϩάΠϯɺγϣοϐϯάΧʔτͳͲʣ • ύʔιφϥΠζʢϢʔβઃఆɺςʔϚͳͲʣ • τϥοΩϯάʢϢʔβʔͷߦಈه࿥෼ੳʣ
147. Cookie Storage • Ϩεϙϯεϔομʹ Set-Cookie ͔Β࢝·ΔσʔλΛೖ ΕΔ͜ͱͰอଘͤ͞Δ͜ͱ͕Ͱ͖Δɻ • ࣍ճҎ߱ͷϦΫΤετͰͦͷ Cookie ͕αʔόʹૹΒ ΕΔɻ 4FSWFS Set-Cookie: id=1; Cookie: id=1;
148. Cookie Storage • Cookie Λ࢖ͬͯྫ͑͹ϩάΠϯ੒ޭ࣌ʹηογϣϯID Λ෇༩͢Δɻ • ࣍ճҎ߱͸ηογϣϯID͕༗ޮ͔Ͳ͏͔Λ֬ೝ͢Ε͹ ϩάΠϯ͍ͯ͠Δ͔Ͳ͏͔ΛαʔόଆͰ൑ผͰ͖Δɻ • ͦͷࡍʹ Expires ΍ MaxAge ଐੑΛ࢖͑͹͍ͭ·Ͱอ ࣋ͤ͞Δ͔΋ࢦఆͰ͖Δɻ
149. Cookie Storage id pass 4FSWFS GET / 302 Redirect GET /login 200 OK POST /login id=foo&pass=xxx 302 Redirect Set-Cookie: session=xxx GET / cookie: session=xxx
150. Cookie Storage id pass 4FSWFS GET / 302 Redirect GET /login 200 OK POST /login id=foo&pass=xxx 302 Redirect Set-Cookie: session=xxx GET / cookie: session=xxx 4FTTJPO
     $PPLJF
     Λ࡞Δ·ͰͷྲྀΕ
151. ޙ൒ Agenda • ϋϯζΦϯ • ϩάΠϯϑΥʔϜΛ࡞ͬͯΈΑ͏ • ·ͱΊ
152. ϋϯζΦϯ
153. ϋϯζΦϯ • ࠓ·Ͱڭ͑ͨ͜ͱΛΞϓϦΛ࡞Γͳ͕ΒৼΓฦΔɻ • ωοτϫʔΫͷ΍ΓऔΓ • σʔλετϨʔδʹ͍ͭͯ • JavaScript Τϯδϯʹ͍ͭͯ • Ͳ͏΍ͬͯϨϯμϦϯά͞ΕͯΔ͔
154. αʔόΛ࡞Δ • Ұ୴͔͜͜ΒϋϯζΦϯΛ։࢝͠·͢ɻ • Node.js ͕ඞཁͳͷͰೖΕ͓͍͍ͯͯͩ͘͞ɻ • HTML Λ഑৴Ͱ͖ΔΑ͏ʹͳΔ·Ͱ͸࡞͓ͬͯ ͍ͨͷͰɺ clone ࣮ͯ͠ߦ͍ͯͩ͘͠͞ɻ • 
     HJU
     DMPOF
     IUUQTHJUIVCDPNSFDSVJUUFDICSPXTFSIBOETPOHJU
     
     DE
     CSPXTFSIBOETPO
     
     OQN
     JOTUBMM
     
     OPEF
     BQQNKT
     
     PQFO
     IUUQMPDBMIPTU
155. ࣮ࡍͷϦΫΤετ/ϨεϙϯεΛ ோΊΔ • ಈ͍ͨΒ࣮ࡍͷϦΫΤετ/ϨεϙϯεΛோΊ ͯΈ·͠ΐ͏ɻ • Chrome Ͱ։ൃπʔϧ(⌘ + Shift + I)Λ։͖ɺ ωοτϫʔΫλϒʹભҠ͠ɺϦΫΤετɾϨ εϙϯεΛݟͯΈ·͢ɻ
156. ωοτϫʔΫͷ΍ΓऔΓ • ͔ͤͬ͘ͳͷͰ https ʹͯ͠Έ·͠ΐ͏ɻ • લॲཧͱͯ͠CAͱূ໌ॻΛ࡞Γɺແཧ໼ཧ trust ͓͖ͤͯ͞·͢ɻ 
     OQN
     FYFD
     NLDFSU
     DSFBUFDB
     
     OQN
     FYFD
     NLDFSU
     DSFBUFDFSU
     
     TVEP
     TFDVSJUZ
     BEEUSVTUFEDFSU
     E
     S
     USVTU3PPU
     L
     -JCSBSZ ,FZDIBJOT4ZTUFNLFZDIBJO
     DBDSU
157. ωοτϫʔΫͷ΍ΓऔΓ • Node.js ଆ΋ https ʹରԠͤͯ͞Έ·͠ΐ͏ɻ • ઌఔ࡞ͬͨ cert ϑΝΠϧΛಡΊ͹ྑ͍Ͱ͢ɻ 
     BQQNKT
     JNQPSU
     \
     SFBE'JMF4ZOD
     ^
     GSPN
     GT
     
     ௥ه
     JNQPSU
     \
     DSFBUF4FSWFS
     ^
     GSPN
     IUUQT
     
     IUUQ
     ͔Β
     IUUQT
     ʹมߋ
     DPOTU
     SFRT
     
     PO
     
     
     DSFBUF4FSWFS \
     
     
     
     
     LFZ
     SFBE'JMF4ZOD DFSULFZ
     
     ௥ه
     
     
     
     
     DFSU
     SFBE'JMF4ZOD DFSUDSU
     
     ௥ه
     
     
     ^ MJTUFO QPSU
     
     
158. ωοτϫʔΫͷ΍ΓऔΓ • खͬऔΓૣ͘ curl ͰΞΫηεͯ͠த਎Λݟͯ Έ·͠ΐ͏ɻ 
     
     DVSM
     J
     WWW
     IUUQTMPDBMIPTUMPHJO
     
     $POOFDUFE
     UP
     MPDBMIPTU
     
     QPSU
     
     
     
     TVDDFTTGVMMZ
     TFU
     DFSUJ fi DBUF
     WFSJGZ
     MPDBUJPOT
     
     5-4W
     065
     5-4
     IBOETIBLF
     $MJFOU
     IFMMP
      
     
     5-4W
     */
     5-4
     IBOETIBLF
     4FSWFS
     IFMMP
      
     
     5-4W
     */
     5-4
     IBOETIBLF
     $FSUJ fi DBUF
      
     
     5-4W
     */
     5-4
     IBOETIBLF
     4FSWFS
     LFZ
     FYDIBOHF
      
     
     5-4W
     */
     5-4
     IBOETIBLF
     4FSWFS
     fi OJTIFE
      
     
159. ωοτϫʔΫͷ΍ΓऔΓ • ࣍ʹ http2 ʹͯ͠Έ·͠ΐ͏ɻ • http2 ͷ createSecureServer Λ࢖ͬͯ http2 αʔόΛཱͯͯΈ·͠ΐ͏ɻ • Chrome ͷ։ൃऀπʔϧͰ http2 ʹͳ͍ͬͯ Ε͹੒ޭͰ͢ɻ
160. σʔλετϨʔδΛࢼ͢ • CSS΍JSΛ Cache-Control Λ࢖ͬͯΩϟο γϡʹೖΕͯΈ·͠ΐ͏ɻ • ։ൃπʔϧͰ (Cached) ͳϨεϙϯε͕ؼͬͯ ͖͍ͯͨΒ੒ޭͰ͢ɻ
161. σʔλετϨʔδΛࢼ͢ • ϩάΠϯΛ੒ޭͤͯ͞Έ·͠ΐ͏ɻ • id/password ΛνΣοΫ͠ɺ߹க͍ͯͨ͠Β੒ޭϨεϙϯ ε (302, Location: "/") ͱڞʹ Set-Cookie ͰΫοΩʔʹηο γϣϯIDΛೖΕͯΈ·͠ΐ͏ʢηογϣϯID͸ԿͰ΋ Մʣɻ • ϩάΠϯηογϣϯ͕ϦμΠϨΫτ͞Εɺ `Login Success!` ͕දࣔ͞Ε͍ͯͨΒ੒ޭͰ͢ɻ
162. JavaScript Τϯδϯʹ͍ͭͯ • ͪͳΈʹࠓͷ script.js ͸׶͑ͯಈ͔ͳ͍Α͏ʹͳͬ ͯ·͢ɻ • ಈ͘Α͏ʹͯ͠Έ͍ͯͩ͘͞ɻͳΜͰಈ͔ͳ͍͔Λ ࢦఠͰ͖ͨΒՃ఺ɻ • DOMΛૢ࡞͠ͳ͕ΒύεϫʔυͷϚεΫΛ֎ͯ͠ɺ දࣔ͢ΔϘλϯͷಈ࡞Λ֬ೝͯ͠Έ͍ͯͩ͘͞ɻ
163. JavaScript Τϯδϯʹ͍ͭͯ • ΋͠Ͱ͖ͨΒಈతʹύεϫʔυೖྗΛνΣο Ϋͤͯ͞Έ͍ͯͩ͘͞ɻ • ೖྗʹԠͯ͡಺༰ΛνΣοΫ͠ɺத਎͕ظ଴ ͢Δ΋ͷ͡Όͳ͔ͬͨΒૹΕͳ͍Α͏ʹͯ͠ Έ͍ͯͩ͘͞ɻ
164. Ͳ͏΍ͬͯϨϯμϦϯά͞Εͯ Δ͔ • ࠷ޙʹ Login Success ͷը໘͕ऐ͍͠ͷͰ HTML Ͱࣗ༝ʹϚʔ ΫΞοϓ͍ͯͩ͘͠͞ɻ • ը૾ΛೖΕͨΓɺಈըͱ͔ೖΕͯΈͨΓ͢Δͷ͕ྑ͍Ͱ͠ΐ ͏ɻ • CSS ͷ z-index Λม͑ͯΈͯલܠͱഎܠΛม͑ͯΈ͍ͯͩ͘͞ɻ • ਌ͷཁૉ͕ࢠͲ΋ͷཁૉʹΑͬͯߴ͕͞มΘͬͨΓ͢Δ͜ͱΛ Chrome ͷ։ൃπʔϧͰ͔֬ΊͯΈ·͠ΐ͏ɻ
165. ·ͱΊ
166. લ൒ • ϒϥ΢βͷػೳ • ϒϥ΢βͷߏ଄ • ϨϯμϦϯάͷ࢓૊Έ • JavaScript Τϯδϯͷ࢓૊Έ • ωοτϫʔΫͷ࢓૊Έ • σʔλετϨʔδͷ࢓૊Έ
167. ޙ൒ • ϋϯζΦϯͰࠓ·Ͱशͬͨ΍ͭΛٯ޲͖ʹҰؾʹ ۦ͚ൈ͚ͯ΋Βͬͨɻ • ωοτϫʔΫ • σʔλετϨʔδ • JavaScript • ϨϯμϦϯά
168. ϒϥ΢βͷத਎ͱ࢓૊ΈΛΘ্͔ͬͨ ͰϋϯζΦϯͰҰؾʹಈ͘΋ͷΛࢼ͢ • ಄ͷதʹϒϥ΢βͷϚοϓΛ΋ͬͨঢ়ଶͰϋϯζΦϯΛ΍ͬ ͯ΋Β͍·ͨ͠ɻ • ͢΂ͯͰ͖ͳ͔ͬͨਓ΋͍Δͱࢥ͏ͷͰɺͦͷํ͸॓୊ͱ͠ ͯ࢒͓͖ͯ͠·͢ɻ • ΞϓϦέʔγϣϯΛ࡞Δ͜ͱ͕Ұ൪ษڧʹͳΔͷͰ͓͢͢Ί ͠·͢ɻ • ಄ͷதʹϚοϓΛ࡞ΓɺΞϓϦέʔγϣϯΛ࡞ΓɺͦΕΛߋ ৽͢Δͱ͍͏αΠΫϧΛճ͍͖ͯ͠·͠ΐ͏ɻ