noun which may take the genitive case particle 'no', noun
latest style; up-to-date fashion
Describes something that reflects the current trends, especially in fashion, hairstyles, or manners. Often used as a no-adjective.
彼女はいつも当世風の髪型をしている。
She always has the latest hairstyle.
当世風の服装でパーティーに
I went to the party in up-to-date clothes.
現代風 means 'modern style' and can refer to a broader contemporary aesthetic, whereas 当世風 emphasizes being up-to-date with current trends.
Compound of 当世 (tōsei, 'the present age') and 風 (fū, 'style'). The exact historical derivation is uncertain, but the word has been used since at least the Edo period to describe contemporary fashions.