:is()と:where()の話

1. JT ͱXIFSF ͷ࿩ 
   ϋʔυϧܹ௿-5େձοʂ
   4IJSB
2. $44ͷ࿩Λ͠·͢ʂ
3. JT
   XIFSF
4. JT w $44ͷٖࣅΫϥεؔ਺
   w Ҿ਺ʹηϨΫλʔͷϦετΛͱΔ
   w ηϨΫλʔͷ܁Γฦ͠ΛݮΒ͢͜ͱ͕Ͱ͖Δ
6. XIFSF w ߏจͱػೳ͸
   JT
   ͱಉ͡
   w །Ұͷҧ͍͸ৄࡉ౓ΛߴΊͳ͍͜ͱ
8. JT ͱXIFSF ͷৄࡉ౓ w JT ͸Ҿ਺಺Ͱ࠷΋ৄࡉ౓ͷߴ͍ηϨΫλʔͷৄࡉ౓ΛͱΔ
   w XIFSF ͸ৄࡉ౓͕ৗʹ
10. JT ͱXIFSF ͷ࢖͍෼͚ w ৄࡉ౓ΛҙਤతʹԼ͍͛ͨ࣌͸XIFSF ɺͦΕҎ֎͸JT Λ࢖͏
    w ৄࡉ౓ΛҙਤతʹԼ͍͛ͨέʔε
    w $44ͷϥΠϒϥϦ΍ϕʔεͷελΠϧγʔτͳͲɺ$44Λฤू͢ΔΞ ΫηεݖΛ࣋ͨͳ͍։ൃऀ͕࢖༻͢ΔαʔυύʔςΟ$44
    w $44Λ্ॻ͖͢Δ͜ͱ͕༧૝͞ΕΔ৔߹ɺৄࡉ౓Λ௿͓͍ͯͨ͘͠ํ ্͕ॻָ͖͕ʂ
11. ͓ΘΓ