@nuff-said/validate

A compact and efficient validation library that offers an array of validation functions all packed into a minzipped code size of 508 bytes!

import validate from './index.js';

const validateUser = validate({
    name: [validate.require(), validate.string(), validate.minLength(3), validate.regex(/^[a-z]+$/g)],
    age: validate.number("Your age gotta be a number")
})

validateUser({
    name: "foobar"
}); // No output

validateUser({
    name: "bazinga",
    age: "12"
})
// Error: Your age gotta be a number

$ npm i @nuff-said/validate

const validator = validate({
    prop1: [validator1],
    prop2: [validator1, validator2, ...validators]
})

validator(obj)

Properties are not required by default. Use validate.required to make them so. Each validator is checked in sequence. Hence, validate.required should always go at the beginning.

A custom error message can be provided to each validator

The following methods are supported for validation:

• required(message?): Checks if value is not undefined or null

• string(message?): Checks if value is a string (or String instance)

• number(message?): Checks if value is a number

• bigint(message?): Checks if value is a BigInt

• boolean(message?): Checks if a value is a boolean

• date(message?): Checks if a value is a valid Date

• array(validators?, message?): Checks if a value is an array. An optional validator or array of validators can be passed to check for each item in the array.

• hasLength(length, message?): Checks if a string or array has a certain length

• minLength(length, message?): Checks if a string or array has a certain minimum length (inclusive)

• maxLength(length, message?): Checks if a string or array has a certain maximum length (inclusive)

• regex(regex, message?): Checks if a string matches a certain regex.

• min(value, message?): Checks if a number is greater than or equal to value

• max(value, message?): Checks if a number is less than or equal to value

Custom validators can also be passed like so:

const fooValidator = (value, key) => value == "foo" || `${key} is not foo`
const validator = validate({
    text: fooValidator
})

validator ({text: "bar"})
// Error: text is not foo!

All contributions are welcome! Feel free to file an issue, point out an optimization or even push a PR!

This project uses the GPL-3.0 license.