@sapphire/shapeshift v3.9.7

@sapphire/shapeshift

ShapeShift

Blazing fast input validation and transformation ⚡

Description

A very fast and lightweight input validation and transformation library for JavaScript.

Note: ShapeShift requires Node.js v15.0.0 or higher to work.

Features

• TypeScript friendly
• Offers CJS, ESM and UMD builds
• API similar to zod
• Faster than ⚡

Usage

For complete usages, please dive into our documentation

Basic usage

Creating a simple string schema

import { s } from '@sapphire/shapeshift';

const mySchema = s.string;

// Parse
mySchema.parse('sapphire'); // => returns 'sapphire'
mySchema.parse(12); // throws ValidationError

Creating an object schema

import { s } from '@sapphire/shapeshift';

const user = s.object({
	username: s.string
});

user.parse({ username: 'Sapphire' });

Defining schemas

Primitives

import { s } from '@sapphire/shapeshift';

// Primitives
s.string;
s.number;
s.bigint;
s.boolean;
s.date;

// Empty Types
s.undefined;
s.null;
s.nullish; // Accepts undefined | null

// Catch-all Types
s.any;
s.unknown;

// Never Type
s.never;

Literals

s.literal('sapphire');
s.literal(12);
s.literal(420n);
s.literal(true);
s.literal(new Date(1639278160000)); // s.date.eq(1639278160000);

Strings

ShapeShift includes a handful of string-specific validations:

s.string.lengthLt(5);
s.string.lengthLe(5);
s.string.lengthGt(5);
s.string.lengthGe(5);
s.string.lengthEq(5);
s.string.lengthNe(5);
s.string.url; // TODO
s.string.uuid; // TODO
s.string.regex(regex); // TODO

Numbers

ShapeShift includes a handful of number-specific validations:

s.number.gt(5); // > 5
s.number.ge(5); // >= 5
s.number.lt(5); // < 5
s.number.le(5); // <= 5
s.number.eq(5); // === 5
s.number.ne(5); // !== 5

s.number.eq(NaN); // special case: Number.isNaN
s.number.ne(NaN); // special case: !Number.isNaN

s.number.int; // value must be an integer
s.number.safeInt; // value must be a safe integer
s.number.finite; // value must be finite

s.number.positive; // .ge(0)
s.number.negative; // .lt(0)

s.number.divisibleBy(5); // TODO | Divisible by 5

And transformations:

s.number.abs; // TODO | Transforms the number to an absolute number
s.number.sign; // TODO | Gets the number's sign

s.number.trunc; // TODO | Transforms the number to the result of Math.trunc`
s.number.floor; // TODO | Transforms the number to the result of Math.floor`
s.number.fround; // TODO | Transforms the number to the result of Math.fround`
s.number.round; // TODO | Transforms the number to the result of Math.round`
s.number.ceil; // TODO | Transforms the number to the result of Math.ceil`

BigInts

ShapeShift includes a handful of number-specific validations:

s.bigint.gt(5n); // > 5n
s.bigint.ge(5n); // >= 5n
s.bigint.lt(5n); // < 5n
s.bigint.le(5n); // <= 5n
s.bigint.eq(5n); // === 5n
s.bigint.ne(5n); // !== 5n

s.bigint.positive; // .ge(0n)
s.bigint.negative; // .lt(0n)

s.bigint.divisibleBy(5n); // TODO | Divisible by 5n

And transformations:

s.bigint.abs; // TODO | Transforms the bigint to an absolute bigint

s.bigint.intN(5); // TODO | Clamps to a bigint to a signed bigint with 5 digits, see BigInt.asIntN
s.bigint.uintN(5); // TODO | Clamps to a bigint to an unsigned bigint with 5 digits, see BigInt.asUintN

Booleans

ShapeShift includes a few boolean-specific validations:

s.boolean.true; // value must be true
s.boolean.false; // value must be false

s.boolean.eq(true); // s.boolean.true
s.boolean.eq(false); // s.boolean.false

s.boolean.ne(true); // s.boolean.false
s.boolean.ne(false); // s.boolean.true

Arrays

const stringArray = s.array(s.string);
const stringArray = s.string.array;

ShapeShift includes a handful of string-specific validations:

s.string.array.lengthLt(5); // Must have less than 5 elements
s.string.array.lengthLe(5); // Must have 5 or less elements
s.string.array.lengthGt(5); // Must have more than 5 elements
s.string.array.lengthGe(5); // Must have 5 or more elements
s.string.array.lengthEq(5); // Must have exactly 5 elements
s.string.array.lengthNe(5); // Must not have exactly 5 elements

Note: .lengthGt and .lengthGe are overloaded and change the inferred type from 1 to 10. For example, s.string.array.lengthGe(2)'s inferred type is [string, string, ...string[]] // TODO

Tuples // TODO

Unlike arrays, tuples have a fixed number of elements and each element can have a different type:

const dish = s.tuple([
	s.string, // Dish's name
	s.number.int, // Table's number
	s.date // Date the dish was ready for delivery
]);

dish.parse(['Iberian ham', 10, new Date()]);

Objects

// Properties are required by default:
const animal = s.object({
	name: s.string,
	age: s.number
});

.extend:

You can add additional fields using either an object or an ObjectValidator, in this case, you will get a new object validator with the merged properties:

const pet = animal.extend({
	owner: s.string.nullish
});

const pet = animal.extend(
	s.object({
		owner: s.string.nullish
	})
);

If both schemas share keys, an error will be thrown. Please use .omit on the first object if you desire this behaviour.

.pick / .omit:

Inspired by TypeScript's built-in Pick and Omit utility types, all object schemas have the aforementioned methods that return a modifier version:

const pkg = s.object({
	name: s.string,
	description: s.string,
	dependencies: s.string.array
});

const justTheName = pkg.pick(['name']);
// s.object({ name: s.string });

const noDependencies = pkg.omit(['dependencies']);
// s.object({ name: s.string, description: s.string });

.partial

Inspired by TypeScript's built-in Partial utility type, all object schemas have the aforementioned method that makes all properties optional:

const user = s
	.object({
		username: s.string,
		password: s.string
	})
	.partial();

Which is the same as doing:

const user = s.object({
	username: s.string.optional,
	password: s.string.optional
});

Unrecognized keys

By default, ShapeShift will not include keys that are not defined by the schema during parsing:

const person = s.object({
	framework: s.string
});

person.parse({
	framework: 'Sapphire',
	awesome: true
});
// => { name: 'Sapphire' }

.strict

You can disallow unknown keys with .strict. If the input includes any unknown keys, an error will be thrown.

const person = s.object({
	framework: s.string
}).strict;

person.parse({
	framework: 'Sapphire',
	awesome: true
});
// => throws ValidationError

.ignore

You can use the .ignore getter to reset an object schema to the default behaviour (ignoring unrecognized keys).

Records // TODO

Record schemas are similar to objects, but validate Record<string, T> types, keep in mind this does not check for the keys, and cannot support validation for specific ones:

const tags = s.record(s.string);

tags.parse({ foo: 'bar', hello: 'world' }); // => { foo: 'bar', hello: 'world' }
tags.parse({ foo: 42 }); // => throws AggregateError
tags.parse('Hello'); // => throws ValidateError

Unions

ShapeShift includes a built-in method for composing OR types:

const stringOrNumber = s.union([s.string, s.number]);

stringOrNumber.parse('Sapphire'); // => 'Sapphire'
stringOrNumber.parse(42); // => 42
stringOrNumber.parse({}); // => throws AggregateError

Enums

Enums are a convenience method that aliases s.union(s.literal(a), s.literal(b), ...):

s.enum('Red', 'Green', 'Blue');
// s.union(s.literal('Red'), s.literal('Green'), s.literal('Blue'));

Maps // TODO

const map = s.map(s.string, s.number);
// Map<string, number>

Sets

const set = s.set(s.number);
// Set<number>

Instances

You can use s.instance(Class) to check that the input is an instance of a class. This is useful to validate inputs against classes:

class User {
	public constructor(public name: string) {}
}

const schema = s.instance(User);
schema.parse(new User('Sapphire')); // => User { name: 'Sapphire' }
schema.parse('oops' as any); // => throws ValidatorError

Functions // TODO

You can define function schemas. This checks for whether or not an input is a function:

s.function; // () => unknown

You can define arguments by passing an array as the first argument, as well as the return type as the second:

s.function([s.string]); // (arg0: string) => unknown
s.function([s.string, s.number], s.string); // (arg0: string, arg1: number) => string

Note: ShapeShift will transform the given function into one with validation on arguments and output. You can access the .raw property of the function to get the unchecked function.

BaseValidator: methods and properties

All schemas in ShapeShift contain certain methods.

.run(data: unknown): Result<T, Error>: given a schema, you can call this method to check whether or not the input is valid. If it is, a Result with success: true and a deep-cloned value will be returned with the given constraints and transformations. Otherwise, a Result with success: false and an error is returned.

.parse(data: unknown): T: given a schema, you can call this method to check whether or not the input is valid. If it is, a deep-cloned value will be returned with the given constraints and transformations. Otherwise, an error is thrown.

.transform<R>((value: T) => R): NopValidator<R>: adds a constraint that modifies the input:

import { s } from '@sapphire/shapeshift';

const getLength = s.string.transform((value) => value.length); // TODO
getLength.parse('Hello There'); // => 11

:warning: .transform's functions must not throw. If a validation error is desired to be thrown, .reshape instead.

.reshape<R>((value: T) => Result<R, Error> | IConstraint): NopValidator<R>: adds a constraint able to both validate and modify the input:

import { s, Result } from '@sapphire/shapeshift';

const getLength = s.string.reshape((value) => Result.ok(value.length)); // TODO
getLength.parse('Hello There'); // => 11

:warning: .reshape's functions must not throw. If a validation error is desired to be thrown, use Result.err(error) instead.

.default(value: T | (() => T)): transform undefined into the given value or the callback's returned value:

const name = s.string.default('Sapphire'); // TODO
name.parse('Hello'); // => 'Hello'
name.parse(undefined); // => 'Sapphire'

const number = s.number.default(Math.random); // TODO
number.parse(12); // => 12
number.parse(undefined); // => 0.989911985608602
number.parse(undefined); // => 0.3224350185068794

:warning: The default values are not validated.

.optional: a convenience method that returns a union of the type with s.undefined.

s.string.optional; // s.union(s.string, s.undefined)

.nullable: a convenience method that returns a union of the type with s.nullable.

s.string.nullable; // s.union(s.string, s.nullable)

.nullish: a convenience method that returns a union of the type with s.nullish.

s.string.nullish; // s.union(s.string, s.nullish)

.array: a convenience method that returns an ArrayValidator with the type.

s.string.array; // s.array(s.string)

.or: a convenience method that returns an UnionValidator with the type. This method is also overridden in UnionValidator to just append one more entry.

s.string.or(s.number);
// => s.union(s.string, s.number)

s.object({ name: s.string }).or(s.string, s.number);
// => s.union(s.object({ name: s.string }), s.string, s.number)

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Contributors ✨

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This project follows the all-contributors specification. Contributions of any kind welcome!