Tweet
Tweet

Slide 1

Slide 1 text

5ZQF4DSJQU͸ ೥Ͱ͜ΜͳʹਐԽ͠· ͨ͠ +BO 5FDI'FFE&YQFSUT/JHIU+BWB4DSJQU5ZQF4DSJQU࠷લઢ !PLVOPLFOUBSP

Slide 2

Slide 2 text

୭ w Ԟ໺ݡଠ࿠!PLVOPLFOUBSP w ΫϨε΢ΣΞגࣜձࣾ w 5ZQF4DSJQUྺ೥ w ϑϩϯ τΤϯ υ ɾ όοΫΤϯ υ

Slide 3

Slide 3 text

5ZQF4DSJQU͸ࡀ w 5ZQF4DSJQU͸೥݄೔ੜ·Ε w ʹύϒϦ οΫͱͳΔ w ʹͯϑΟ ʔ υόοΫΛ΋ͱʹվྑ͠Λ໨ࢦ͢ w Array͕ArrayʹͳΔ w ೥݄೔ʹ͕Ϧ Ϧʔε

Slide 4

Slide 4 text

5ZQF4DSJQUY w %F fi OJUFMZ5ZQFE ʢ༗ࢤίϛϡχςΟʣ ʹͯ 
 ࣍ʑ ͱ+4ϥΠ ϒϥ Ϧ༻ͷܕఆٛϑΝΠϧ(.d.ts)͕࡞੒͞ΕΔ w OQNͰ؅ཧ͞Ε͍ͯͳ͍࣌୅ w ܕఆٛґଘղܾπʔϧͱ͍͏ͷ͕ผʹ͋ͬͨ

Slide 5

Slide 5 text

5ZQF4DSJQUY w %F fi OJUFMZ5ZQFEͷܕఆٛϑΝΠϧ͕OQNʹͯ؅ཧ͞ΕΔ w ͍·΍౰ͨΓલ w @types/something͸Πϯε τʔϧෆཁͰ಺แ͍ͯ͠Δ͜ͱ͢Β͋Δ w ৽֓೦ͷొ৔ w --strictNullChecks w neverܕ

Slide 6

Slide 6 text

5ZQF4DSJQUͷࠎ֨Λ࡞ͬͨ࣌୅ w 5VQMF5ZQFT w 6OJPO5ZQFT w 5ZQF(VBSET w 4USJOH-JUFSBM5ZQFT w .BQQFE5ZQFT w $POEJUJPOBM5ZQFT

Slide 7

Slide 7 text

5ZQF4DSJQUY w ৽֓೦ͷొ৔ w unknownܕ w Α Γߴ౓ͳܕఆٛͷͨΊͷվྑ w Y·Ͱͷ৽ػೳʹର͢Δ֦ு΍վྑ w Α Γݡ͍ܕਪ࿦ͱܕΨʔ υ

Slide 8

Slide 8 text

IUUQTRJJUBDPNBEWFOUDBMFOEBSPLVOPLFOUBSPUT 5ZQF4DSJQUҰਓΞ υϕϯ τΧϨϯμʔ

Slide 9

Slide 9 text

5ZQF4DSJQU w 5FNQMBUF-JUFSBM5ZQFT w ໘ന͍͜ͱ΍Γ์୊ w ԼهλΠ τϧͰݕࡧ wʰ5ZQF4DSJQUܕύζϧͰ࡞ΔNJOJJOUFSQSFUFSʱ wʰ5ZQF4DSJQUͷܕఆٛͰຑ੃ͷ໾൑ఆΛ͢Δʱ

Slide 10

Slide 10 text

5ZQF4DSJQU w 3FDVSTJWF$POEJUJPOBM5ZQFT w $POEJUJPOBM5ZQFTͷܕܾఆॲཧ͕࠶ؼՄೳʹͳͬͨ w ΧϨϯμʔ ʰ࣮ྫRecursivePartialʱ ʹͯ঺հ 
 IUUQT[FOOEFWPLVOPLFOUBSPBSUJDMFTHNQLQH[CHLINCLBQDL

Slide 11

Slide 11 text

5ZQF4DSJQU w --useUnknownInCatchVariables w DBUDIϒϩοΫͰͷFSSม਺͕σϑΥϧ τͰunknownܕѻ͍͞ΕΔΑ ͏ʹͳͬͨ w ·Ͱ͸anyܕ w Ҏ߱ɺ ΦϓγϣφϧͰunknownܕʹมߋ

Slide 12

Slide 12 text

5ZQF4DSJQU w /PEFKTʹ͓͚Δ&4.PEVMFʹରԠ͢ΔͨΊͷίϯύΠϧ ɾ Φϓγϣϯ௥Ճ w ͔Βʹ͔͚ͯ$+4 &4.ؔ࿈ͷରԠΛॆ࣮ wʰ5ZQF4DSJQUͱ/BUJWF/PEFKT&4.ʱ ʹৄ͍͠ 
 IUUQTRVSBNZNFEJVNDPNUZQFTDSJQU&"OBUJWFOPEFKTFTNBCB

Slide 13

Slide 13 text

5ZQF4DSJQU w satisfies0QFSBUPS w ٱʑʹ৽֓೦ w ຊ೔ͷࣛ໺૖͞Μͷ ʰ5ZQF4DSJQUͷBTDPOTUTBUJT fi FT͕ศརʱ ͕ৄ͍͠

Slide 14

Slide 14 text

ਐԽͷ܏޲ w 5ZQF4DSJQU͔Β·Ͱ͸ౖ౭ͷਐԽͩͬͨ w ೔ʑมΘΔۀ຿্ͰͷςΫχοΫ w ػೳ௥Ճͷͨͼʹ ʮ͋Ε͸Ͳ͜Ͱ࢖͑Δʯ Λߟ͍͑ͯ͘ w Ҏ߱͸Ұൠతͳ։ൃۀ຿Λ͜ͳ͢ݶΓͰ͸ɺ ͔ͳΓΏΔ΍͔ͳਐԽ w ΏΔ΍͔͚ͩͲ͔Ώ͍ͱ͜Ζʹख͕ಧ͘ਐԽ͕૿͑ͨ w ܕఆٛ࡞੒ऀʹͱͬͯ͸ ʮ଴ͬͯ·ͨ͠ʯ ͳػೳ௥Ճ͕ଟ͍͕ 
 ਺όʔδϣϯ͘ Β͍ͳΒΩϟονΞοϓ͕஗Εͯ΋େৎ෉ ʂ w ஌͓ͬͯ͘ ͱ ʮۀ຿্Ͱͪΐͬͱॿ͔Δʯ ͷස౓͕૿͑ͯ͘ Δ͔΋

Slide 15

Slide 15 text

ֶशํ๏ͷεεϝ w 5ZQF4DSJQUॳֶऀʹ͸ઐ໳ॻͱ౰ํͷΞ υϕϯ τΧϨϯμʔ ̎ ̑ هࣄΛΦεεϝ w ઐ໳ॻˠ໢ཏతʹ֬ೝͰ͖Δ w Ξ υϕϯ τΧϨϯμʔˠۀ຿্Ͱͷ޻෉Λ๛෋ʹ঺հ w ࠓޙͲ͏ ͍ͯ͘͠ ͱΑ͍͔ ʁ w 5ZQF4DSJQUࣗମͷΩϟονΞοϓ͸͢Δͱͯ͠ɺ Ή͠Ζपลࣄ৘ʹڵຯΛ΋ͭ͜ͱΛΦεεϝ w %FOPͱ͸ ʁ #VOͱ͸ ʁ &4ͱ͸ ʁ 5$ͱ͸ ʁ w Ϟδϡʔϧࣄ৘͸ ʁ $+4 &4. όϯ υϧࣄ৘͸ ʁ ʢ5VSCP 7JUFͳͲʣ

Slide 16

Slide 16 text

5IBOLZPV