class-validator-extended
April 15, 2026 · View on GitHub
class-validator-extended
Additional validators for class-validator.
Safe and simple to use
- 🕵️♀️ Thoroughly tested
- 📝 Well documented
- ✨ No additional dependencies (Day.js is supported but optional)
- 😊 Uses Semantic Versioning and keeps a nice Changelog
Installation
Use your favorite package manager to install:
npm install class-validator-extended
For obvious reasons, class-validator needs to be installed.
Usage
Just use the decorators like any of the built-in ones:
import { ArrayMinSize } from 'class-validator'
import { ArrayMonotonic } from 'class-validator-extended'
class Foo {
@ArrayMinSize(2)
@ArrayMonotonic()
values: [1, 13, 42]
}
If you don't have Dayjs installed you need to use the minimal export:
import { MaxBigInt } from 'class-validator-extended/dist/minimal'
Please note that Dayjs is an optional dependency and will by default be installed by npm and yarn. To avoid this use npm install --omit optional or yarn install --ignore-optional, respectively.
Validation decorators
For detailed information please read the API docs.
| Decorator | Description | API |
|---|---|---|
| Type | ||
@IsBigInt(options?) | Checks if the given value is a BigInt. | 🔗 |
@IsDayjs(options?) | Checks if the given value is a valid Dayjs object. | 🔗 |
@IsDuration(options?) | Checks if the given value is a valid Dayjs duration. | 🔗 |
@IsNull(options?) | Checks if the given value is null. | 🔗 |
@IsMap(options?) | Checks if the given value is a Map. | 🔗 |
@IsSet(options?) | Checks if the given value is a Set. | 🔗 |
| Common | ||
@Nullable(options?) | Only validates the given value if it is not null. | 🔗 |
@Optional(options?) | Only validates the given value if it is not undefined. | 🔗 |
| Array | ||
@ArrayMonotonic(options?) | Checks if the given value is an array sorted in either (strictly) ascending or (strictly) descending order. | 🔗 |
@ArraySize(size, options?) | Checks if the given value is an array with exactly size elements. | 🔗 |
| BigInt | ||
@MaxBigInt(maximum, options?) | Checks if the given value is a BigInt not greater than maximum. | 🔗 |
@MinBigInt(minimum, options?) | Checks if the given value is a BigInt not less than minimum. | 🔗 |
@NegativeBigInt(options?) | Checks if the given value is a BigInt less than zero. | 🔗 |
@PositiveBigInt(options?) | Checks if the given value is a BigInt greater than zero. | 🔗 |
| Date | ||
@FutureDate(options?) | Checks if the given value is a Date object in the future. | 🔗 |
@PastDate(options?) | Checks if the given value is a Date object in the past. | 🔗 |
| Dayjs | ||
@FutureDayjs(options?) | Checks if the given value is a valid Dayjs object in the future. | 🔗 |
@MaxDayjs(maximum, options?) | Checks if the given value is a valid Dayjs object not later than maximum. | 🔗 |
@MaxDuration(minimum, options?) | Checks if the given value is a valid Dayjs duration not longer than maximum. | 🔗 |
@MinDayjs(minimum, options?) | Checks if the given value is a valid Dayjs object not earlier than minimum. | 🔗 |
@MinDuration(minimum, options?) | Checks if the given value is a valid Dayjs duration not shorter than minimum. | 🔗 |
@PastDayjs(options?) | Checks if the given value is a valid Dayjs object in the past. | 🔗 |
| Map | ||
@MapContains(required, options?) | Checks if the given value is a Map and contains all required values. | 🔗 |
@MapContainsKeys(required, options?) | Checks if the given value is a Map and contains all required keys. | 🔗 |
@MapMaxSize(maximum, options?) | Checks if the given value is a Map with no more than maximum entries. | 🔗 |
@MapMinSize(minimum, options?) | Checks if the given value is a Map with no fewer than minimum entries. | 🔗 |
@MapNotContains(forbidden, options?) | Checks if the given value is a Map which does not contain any of the forbidden values. | 🔗 |
@MapNotContainsKeys(forbidden, options?) | Checks if the given value is a Map which does not contain any of the forbidden keys. | 🔗 |
@MapNotEmpty(options?) | Checks if the given value is a Map with at least one entry. | 🔗 |
@MapSize(size, options?) | Checks if the given value is a Map with exactly size entries. | 🔗 |
@MapUnique(projection, options?) | Checks if the given value is a Map without duplicates with regard to the given projection. | 🔗 |
@MapUniqueKeys(projection, options?) | Checks if the given value is a Map whose keys are all unique with regard to the given projection. | 🔗 |
| Number | ||
@IsNetworkPort(options?) | Checks if the given value is a valid port number. | 🔗 |
| Set | ||
@SetContains(required, options?) | Checks if the given value is a Set and contains all required values. | 🔗 |
@SetMaxSize(maximum, options?) | Checks if the given value is a Set with no more than maximum values. | 🔗 |
@SetMinSize(minimum, options?) | Checks if the given value is a Set with no fewer than minimum values. | 🔗 |
@SetNotContains(forbidden, options?) | Checks if the given value is a Set which does not contain any of the forbidden values. | 🔗 |
@SetSize(size, options?) | Checks if the given value is a Set with exactly size entries. | 🔗 |
@SetNotEmpty(options?) | Checks if the given value is a Set with at least one value. | 🔗 |
@SetUnique(projection, options?) | Checks if the given value is a Set without duplicate values with regard to the given projection. | 🔗 |
| String | ||
@IsAwsRegion(options?) | Checks if the given value is an AWS region string. deprecated | 🔗 |
@IsAwsARN(options?) | Checks if the given value is an AWS ARN string. deprecated | 🔗 |
@NotMatches(pattern, modifiers?, options?) | Checks if the given value is an string that does not match the given regular expression. | 🔗 |