一个枚举值，用于指定 Update 生成的内容的内容类型。
如需调用枚举，您可以调用其父类、名称和属性。例如
CardService.ContentType.TEXT。
属性
| 属性 | 类型 | 说明 |
|---|---|---|
TEXT | Enum | 表示生成的内容是纯文本。默认。 |
MUTABLE_HTML | Enum | 表示生成的内容采用 HTML 格式。内容生成后，您可以对其进行修改。 |
IMMUTABLE_HTML | Enum | 表示生成的内容采用 HTML 格式，但生成后无法修改。 |
Enum ContentType
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最后更新时间 (UTC)：2025-07-26。
[null,null,["最后更新时间 (UTC)：2025-07-26。"],[[["\u003cp\u003e\u003ccode\u003eContentType\u003c/code\u003e is an enum used to define the type of content generated by \u003ccode\u003eUpdateDraftActionResponse\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eContent types include \u003ccode\u003eTEXT\u003c/code\u003e (default plain text), \u003ccode\u003eMUTABLE_HTML\u003c/code\u003e (editable HTML), and \u003ccode\u003eIMMUTABLE_HTML\u003c/code\u003e (non-editable HTML).\u003c/p\u003e\n"],["\u003cp\u003eTo specify a content type, use the syntax: \u003ccode\u003eCardService.ContentType.PROPERTY\u003c/code\u003e, replacing \u003ccode\u003ePROPERTY\u003c/code\u003e with the desired type.\u003c/p\u003e\n"]]],["The `ContentType` enum specifies the type of content generated by an `UpdateDraftActionResponse`. It has three properties: `TEXT`, `MUTABLE_HTML`, and `IMMUTABLE_HTML`. `TEXT` indicates plain text, which is the default. `MUTABLE_HTML` represents editable HTML content, while `IMMUTABLE_HTML` represents HTML content that cannot be edited after generation. These properties are accessed via `CardService.ContentType` followed by the chosen type, such as `TEXT`.\n"],null,["# Enum ContentType\n\nContentType\n\nAn enum value that specifies the content type of the content generated by a [UpdateDraftActionResponse](/apps-script/reference/card-service/update-draft-action-response).\n\nTo call an enum, you call its parent class, name, and property. For example, `\nCardService.ContentType.TEXT`. \n\n### Properties\n\n| Property | Type | Description |\n|------------------|--------|---------------------------------------------------------------------------------------------------------------------|\n| `TEXT` | `Enum` | Indicates that the generated content is plain text. Default. |\n| `MUTABLE_HTML` | `Enum` | Indicates that the generated content is formatted as HTML. The content can be edited after it is generated. |\n| `IMMUTABLE_HTML` | `Enum` | Indicates that the generated content is formatted as HTML, but this content cannot be edited after it is generated. |"]]