String rotation - output string repeatedly moving first character to the end

Haskell, 27 bytes

scanl(\(a:b)_->b++[a])=<<id

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Jelly, 2 bytes

ṙJ

A monadic Link accepting a list of characters which yields a list of lists of characters

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APL (Dyalog Unicode), 6 bytes^SBCS

⍳∘≢⌽¨⊂

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⍳ the indices

∘ of

≢ the tally

⌽¨ each rotate (to the left)

⊂ the entire string