> For the complete documentation index, see [llms.txt](https://typescript-jp.gitbook.io/deep-dive/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://typescript-jp.gitbook.io/deep-dive/main-1/stringenums.md).

# String Based Enums

場合によっては、共通キーの下に一連の文字列を集めることが必要になることがあります。 TypeScript 2.4以前では、TypeScriptは数値ベースの列挙型のみをサポートしていました。 2.4より前のバージョンを使用している場合は、[文字列リテラル型を使用して文字列ベースの列挙型をユニオン型と組み合わせて作成する](/deep-dive/type-system/literal-types.md)を使用します。


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