Webナイト宮崎 Vol.10 ~てげTypeScriptを学びたい~ - connpass https://tegehoge.connpass.com/event/186724/
KOSUKE OGAWA 2020WebφΠτٶ࡚ No. 10Ϧςϥϧܕʹ͍ͭͯ
View Slide
ࣗݾհw 0HBXB,PTVLFʢ!LPPHBXBʣw Ξϧגࣜձࣾʢ౦ژʣw ٶ࡚͔ΒϑϧϦϞʔτw J04 4XJGU "OESPJE ,PUMJO 5ZQF4DSJQU $44 7VFKT /VYUKTͳͲw ࠷ۙϑϩϯτΤϯυ͕ϝΠϯ
͋Δͱ͋ΔίʔυΛಡΜͰ͍ͨΒɺ͜ΜͳίʔυΛݟ͚ͭͨ
w AAͱ͔AAͱ͍͏ܕ͕͋Δʂʁw BOVNCFSͳΒΘ͔Δ
• 6 2000 ͔͠ڐ͞Εͳ͍ܕ• จࣈྻͷϦςϥϧܕ͋Δ• const b: 'bar' = 'foo'; // Τϥʔ: Type '"foo"' is not assignable to type ‘"bar"'.Ϧςϥϧܕͱ͍͏Β͍͠
• จࣈྻͷϦςϥϧܕΛ࣋ͭstringܕͱͯ͠ѻ͏͜ͱ͕Ͱ͖ΔจࣈྻͷϦςϥϧܕ
• ܕऍΛলུͯͪ͠ΌΜͱਪ͞ΕΔϦςϥϧܕͱܕਪ
͍ಓ
• ϝϯόมͷΛมߋͯ͠΄͘͠ͳ͍ͱ͖͍ಓ1
• ϢχΦϯܕͰ݁߹͢Δ͍ಓ2
͋Γ͕ͱ͏͍͟͝·ͨ͠