brand

Creates a brand transformation action.

const Action = v.brand<TInput, TName>(name);

Generics

• TInput extends any
• TName extends BrandName

Parameters

• name TName

Explanation

brand allows you to brand the output type of a schema with a name. This ensures that data can only be considered valid if it has been validated by a particular branded schema.

Returns

• Action BrandAction<TInput, TName>

Examples

The following examples show how brand can be used.

Branded fruit schema

Schema to ensure that only a validated fruit is accepted.

// Create schema and infer output type
const FruitSchema = v.pipe(v.object({ name: v.string() }), v.brand('Fruit'));
type FruitOutput = v.InferOutput<typeof FruitSchema>;

// This works because output is branded
const apple: FruitOutput = v.parse(FruitSchema, { name: 'apple' });

// But this will result in a type error
const banana: FruitOutput = { name: 'banana' };

Related

The following APIs can be combined with brand.

Schemas

• any,
• array,
• bigint,
• blob,
• boolean,
• custom,
• date,
• enum,
• file,
• function,
• instance,
• intersect,
• lazy,
• literal,
• looseObject,
• looseTuple,
• map,
• nan,
• never,
• nonNullable,
• nonNullish,
• nonOptional,
• null,
• nullable,
• nullish,
• number,
• object,
• objectWithRest,
• optional,
• picklist,
• promise,
• record,
• set,
• strictObject,
• strictTuple,
• string,
• symbol,
• tuple,
• tupleWithRest,
• undefined,
• undefinedable,
• union,
• unknown,
• variant,
• void

Methods

• pipe

Utils

• isOfKind,
• isOfType