✅縦方向中央揃え
divを二重にして親にdisplay: flex, align-items: centerした
なお左右中央揃えは子のwidthを固定してtext-align: centerで実現している
"Engineer's way of creating knowledge" the English version of my book is now available on [Engineer's way of creating knowledge]
(C)NISHIO Hirokazu / Converted from [Scrapbox] at [Edit]