unacy / validateEnum

Function: validateEnum()

function validateEnum(value): value is EnumType;

Defined in: packages/core/src/utils/validation.ts:102

Validate that a runtime value is a valid TypeScript enum object.

Accepts numeric enums (with reverse-mapped keys filtered out) and string enums. Rejects empty objects and mixed enums whose forward entries contain both string and number values.

Parameters

Parameter	Type	Description
value	unknown	The value to validate

Returns

value is EnumType

true if value is a valid EnumType

Throws

If the enum contains both numeric and string members

Example

enum LogLevel { DEBUG = 0, INFO = 1 }
validateEnum(LogLevel); // true
validateEnum({}); // false

Use When

You are receiving a runtime value and need to confirm it is a valid TypeScript enum before using it as a TypedMetadata<EnumType>.type field.

Pitfalls

NEVER use validateEnum to check plain objects that happen to have string values — they may look like string enums but carry no semantic meaning. Use validateRecordSchema for plain data objects.