@altostra/type-validations NPM

Type validations

Type validations is a library for creating type-validators: augmented type-guards that perform full runtime type-validation and let TypeScript type checker know what a type may be in a certain context.

Installation

$ npm install @altostra/type-validations

Reference

A full reference can be found here.

`allOf`

Creates type-validators for an intersections-type from a list of type-validators.

`anyOf`

Creates type-validators for a union-type from a list of type-validators.

`arrayOf`

Given type-guard for type T, creates a type-validator for T[].

`assertBy`

Create assertion-functions from type-validation and an error-factory.

`enumOf`

Creates a type-validation that checks if a value is one of the specified values (using strict equality).

`is`

Creates a type-validation that only allows values that are strictly equal to the provided value.

`isEmptyArray`

A type-validation that checks if a value is an empty array.

`isEmptyObject`

A type-validation that checks if a value is an empty object.

`isFunction`

Creates a type-validation that checks if a value is a function with a specified length.

`maybe`

Creates a type-validation that checks if a value is of validated type, undefined, and optionally null.

`objectOf`

Creates type-validation that checks if a value is an object that all its properties are validated with the provided validations.

`recordOf`

Creates type-validator that checks that a given value is an object and that all its own-enumerable properties are of a specified type.

`singleOrArray`

Creates a type-validation that checks if a value is either a specific type or an array of that type.

`taggedUnionOf`

Creates type-validators for a union-type from a mapping between specified tag property values and validators, when the union-type is in fact a discriminated union.