# ``enum`` declaration merging is not supported Rule ``arkts-no-enum-merging`` **Severity: error** ArkTS does not support merging declarations for ``enum``. Keep the declaration of each ``enum`` compact in the codebase. ## TypeScript ``` enum Color { RED, GREEN } enum Color { YELLOW = 2 } enum Color { BLACK = 3, BLUE } ``` ## ArkTS ``` enum Color { RED, GREEN, YELLOW, BLACK, BLUE } ```