looseObject

Creates a loose object schema.

const Schema = v.looseObject<TEntries, TMessage>(entries, message);

Generics

• TEntries extends ObjectEntries
• TMessage extends ErrorMessage<LooseObjectIssue> | undefined

Parameters

• entries TEntries
• message TMessage

Explanation

With looseObject you can validate the data type of the input and whether the content matches entries. If the input is not an object, you can use message to customize the error message.

The difference to object is that this schema includes any unknown entries in the output. In addition, this schema filters certain entries from the unknown entries for security reasons.

This schema does not distinguish between missing and undefined entries. The reason for this decision is that it reduces the bundle size, and we also expect that most users will expect this behavior.

Returns

• Schema LooseObjectSchema<TEntries, TMessage>

Examples

The following examples show how looseObject can be used. Please see the object guide for more examples and explanations.

Simple object schema

Schema to validate a loose object with two specific keys.

const SimpleObjectSchema = v.looseObject({
  key1: v.string(),
  key2: v.number(),
});

Merge several objects

Schema that merges the entries of two object schemas.

const MergedObjectSchema = v.looseObject({
  ...ObjectSchema1.entries,
  ...ObjectSchema2.entries,
});

Mark keys as optional

Schema to validate an object with partial entries.

const PartialObjectSchema = v.partial(
  v.looseObject({
    key1: v.string(),
    key2: v.number(),
  })
);

Object with selected entries

Schema to validate only selected entries of a loose object.

const PickObjectSchema = v.pick(
  v.looseObject({
    key1: v.string(),
    key2: v.number(),
    key3: v.boolean(),
  }),
  ['key1', 'key3']
);

Related

The following APIs can be combined with looseObject.

Schemas

• any,
• array,
• bigint,
• blob,
• boolean,
• custom,
• date,
• enum,
• file,
• function,
• instance,
• intersect,
• lazy,
• literal,
• 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

• assert,
• config,
• fallback,
• forward,
• getDefault,
• getDefaults,
• getFallback,
• getFallbacks,
• is,
• keyof,
• omit,
• parse,
• parser,
• partial,
• pick,
• pipe,
• required,
• safeParse,
• safeParser

Actions

• check,
• brand,
• description,
• metadata,
• partialCheck,
• rawCheck,
• rawTransform,
• readonly,
• title,
• transform

Utils

• entriesFromList,
• isOfKind,
• isOfType