Developer builds Wordle clone in vanilla JS, tackling the duplicate-letter scoring problem

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A developer has created a playable Wordle clone using vanilla JavaScript, published as part of a project called GameFromZero. The build highlights a well-known algorithmic challenge: correctly coloring guesses that contain repeated letters. A naive single-pass check incorrectly marks duplicate letters as yellow even when the answer has fewer instances of that letter. The correct solution uses two passes — first identifying exact matches, then checking remaining letters for partial matches using a per-letter count. The finished game features a 6×5 board, CSS flip animations, and an on-screen keyboard that reflects each letter's best-known state.

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