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typescript

TS2322: Enum type mismatch — string or number not assignable to enum type

You're passing a raw string or number where TypeScript expects a specific enum value. Enums create a distinct type — even if the string matches an enum member's value, TypeScript won't automatically accept it without an explicit enum member reference or assertion.

Common causes

Passing a string literal ('active') where an enum value (Status.Active) is expected
Numeric enums accept number assignments, but string enums require the exact enum member
Comparing or assigning between two different enum types
Getting an enum value from an external source (API, config) as a plain string

How to fix it

Use the enum member directly: Status.Active instead of 'active'
Cast with a type assertion if data comes from outside TypeScript: status as Status
Import and use the enum value from wherever it's defined rather than repeating the string
For API responses, validate and map to the enum: const status = data.status as Status

Example

enum Status { Active = 'active', Inactive = 'inactive' }
const s: Status = 'active';
// error TS2322: Type '"active"' is not assignable to type 'Status'.

Assigning the string 'active' directly instead of using the Status.Active enum member

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