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オブジェクトの値からなるunion type
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| const MyFood = { | |
| Food1: "ラーメン", | |
| Food2: "カツ丼", | |
| Food3: "ビャンビャン麺", | |
| } as const; | |
| type FoodNameType = typeof MyFood[keyof typeof MyFood]; | |
| // 結果： "ラーメン" | "カツ丼" | "ビャンビャン麺" |
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