Datamatch - Simple and Fast Data Validation for Node.js

MAJOR UPDATE v2

Datamatch is a user-friendly and easy-to-use JavaScript library for data validation without any dependencies. It allows you to validate input values against specific criteria and returns the validation result. This library is designed for use in Node.js projects. It is perfect for developers who need a fast and reliable way to validate data.

IMPORTANT: Data types and check options are updated every week. Contact issues to add custom data TYPES and OPTIONS.

Table of Contents

• Installation
• Update
• Import
• Usage
  • Example 1: Number validation
  • Example 2: Number validation with options
  • Example 3: Array validation
  • Example 4: Array validation with options
  • Example 5: Nested field validation
  • Example 6: Nested field validation with options
  • Example 7: AND logic
  • Example 8: OR logic
• Default NodeJS TYPES
  • isUndefined
  • isNull
  • isBoolean
  • isNumber
  • isBigInt
  • isString
  • isArray
  • isObject
  • isFunction
  • isAsyncFunction
  • isPromise
  • isSymbol
  • isArrayBuffer
  • isSet
  • isMap
  • isDate
  • isRegExp
  • isDataView
  • isInt8Array
  • isInt16Array
  • isInt32Array
  • isUint8Array
  • isUint16Array
  • isUint32Array
  • isFloat32Array
  • isFloat64Array
  • isUint8ClampedArray
  • isSharedArrayBuffer
• OPTIONS
  • min
  • max
  • length
  • minLength
  • maxLength
  • values
  • isDate
  • isDomain
  • isUrl
  • isHTTPUrl
  • isHTTPSUrl
  • isWSUrl
  • isWSSUrl
  • isIP
  • isIPv4
  • isIPv6
  • isJSON
  • isBase64
  • isFloat
  • isInt
  • isNumeric
• License

Installation

Install Datamatch using npm:

npm i datamatch

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Update

Update Datamatch using npm:

npm install datamatch@latest

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Import

import Datamatch from 'datamatch';

OR

const Datamatch = require('datamatch');

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Usage

Example 1: Number validation

const penCount = 5;
console.log(Datamatch.isNumber(penCount)); // true

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Example 2: Number validation with options

const penCount = 5;
console.log(Datamatch.isNumber(penCount, { max: 4 })); // false

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Example 3: Array validation

const firends = [ `John`, `Katrin`, `Tom` ];
console.log(Datamatch.isArray(firends)); // true

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Example 4: Array validation with options

const firends = [ `John`, `Katrin`, `Tom` ];
console.log(Datamatch.isArray(firends, { maxLength: 2 })); // false

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Example 5: Nested field validation

const obj = {
    one: null,
    two: 55,
    three: { four: 'Hello' },
    five: { six: [ 'John', 'Katrin', 123 ] }
};

const run = Datamatch.init()
    .field('one').isNull()
    .field('two').isNumber()
    .field('three').isObject()
        .field('four').isString()
        .end()
    .field('five').isObject()
        .field('six').isArray().isString().isNumber().end()
        .end()
    .check(obj);

if (run.errors) {
    console.log(run.errors); // Shows all fields path and whats wrong.
} else {
    console.log(true);
}

// Returns: true

IMPORTANT: Always use '.end()' to close .isObject() and .isArray() constructions.

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Example 6: Nested field validation with options

const obj = {
    one: null,
    two: 55,
    three: { four: 'Hello' },
    five: { six: [ 'John', 'Katrin', 123 ] }
};

const run = Datamatch.init()
    .field('one').isNull()
    .field('two').isNumber()
    .field('three').isObject()
        .field('four').isString()
        .end()
    .field('five').isObject()
        .field('six').isArray().isString().isNumber({ max: 122 }).end()
        .end()
    .check(obj);

if (run.errors) {
    console.log(run.errors); // Shows all fields path and whats wrong.
} else {
    console.log(true);
}

// Returns: [ "Array element in field 'five.six' must be less or equal than '122'. '123' given." ]

IMPORTANT: Always use '.end()' to close .isObject() and .isArray() constructions.

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Example 7: AND logic

OPTIONS always means AND logic

For example:

const obj = {
    login: 'john',
};

const run = Datamatch.init()
    .field('login').isString({ minLength: 4, values: ['john', `alex`]})
    .check(obj);

if (run.errors) {
    console.log(run.errors); // Shows all fields path and whats wrong.
} else {
    console.log(true);
}

// Returns: true

Field 'login' must have minimum length 4, AND contain one of values 'john' / 'alex'.

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Example 8: OR logic

TYPES always means OR logic

For example:

const obj = {
    login: 'john',
};

const run = Datamatch.init()
    .field('login').isString()
    .field('password').isUndefined().isString()
    .check(obj);

if (run.errors) {
    console.log(run.errors); // Shows all fields path and whats wrong.
} else {
    console.log(true);
}

// Returns: true

Field 'password' can be do not set, OR set as string.

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Default NodeJS types

isUndefined

Available options: no.

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isNull

Available options: no.

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isBoolean

Available options: no.

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isNumber

Available options:
min
max
length
minLength
maxLength
values
isFloat
isInt
isNumeric

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isBigInt

Available options:
min
max
length
minLength
maxLength
values

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isString

Available options:
minLength
minLength
maxLength
values
isDate
isDomain
isUrl
isHTTPUrl
isHTTPSUrl
isWSUrl
isWSSUrl
isIP
isIPv4
isIPv6
isJSON
isBase64
isFloat
isInt
isNumeric

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isArray

Available options:
length
minLength
maxLength

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isObject

Available options: no.

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isFunction

Available options: no.

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isAsyncFunction

Available options: no.

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isPromise

Available options: no.

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isSymbol

Available options: no.

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isArrayBuffer

Available options: no.

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isSet

Available options: no.

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isMap

Available options: no.

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isDate

Available options: no.

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isRegExp

Available options: no.

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isDataView

Available options: no.

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isInt8Array

Available options: no.

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isInt16Array

Available options: no.

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isInt32Array

Available options: no.

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isUint8Array

Available options: no.

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isUint16Array

Available options: no.

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isUint32Array

Available options: no.

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isFloat32Array

Available options: no.

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isFloat64Array

Available options: no.

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isUint8ClampedArray

Available options: no.

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isSharedArrayBuffer

Available options: no.

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Options

min

console.log(Datamatch.isNumber(5, { min: 5 })); // true
console.log(Datamatch.isNumber(5, { min: 6 })); // false

const ants = BigInt('1000000000000000000000000000000');
console.log(Datamatch.isBigInt(big, { min: '1000000000000000000000000000000' })); // true
console.log(Datamatch.isBigInt(big, { min: '1000000000000000000000000000001' })); // false

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max

console.log(Datamatch.isNumber(5, { max: 5 })); // true
console.log(Datamatch.isNumber(5, { max: 4 })); // false

const atoms = BigInt('3200000000000000000000000000000')
console.log(Datamatch.isBigInt(bigCount, { max: '3200000000000000000000000000000' })); // true
console.log(Datamatch.isBigInt(bigCount, { max: '3199999999999999999999999999999' })); // false

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length

console.log(Datamatch.isNumber(9, { length: 1 })); // true
console.log(Datamatch.isNumber(9, { length: 2 })); // false

console.log(Datamatch.isBigInt(BigInt('12345'), { length: 5 })); // true
console.log(Datamatch.isBigInt(BigInt('12345'), { length: 4 })); // false

console.log(Datamatch.isString('Hello', { length: 5 })); // true
console.log(Datamatch.isString('Hello', { length: 4 })); // false
console.log(Datamatch.isString('Hello', { length: 6 })); // false

console.log(Datamatch.isArray([ 1, 2, 3, 4, 5 ], { length: 5 })); // true
console.log(Datamatch.isArray([ 1, 2, 3, 4, 5 ], { length: 4 })); // false
console.log(Datamatch.isArray([ 1, 2, 3, 4, 5 ], { length: 6 })); // false

minLength

console.log(Datamatch.isNumber(9, { minLength: 1 })); // true
console.log(Datamatch.isNumber(9, { minLength: 2 })); // false

console.log(Datamatch.isBigInt(BigInt('12345'), { minLength: 5 })); // true
console.log(Datamatch.isBigInt(BigInt('12345'), { minLength: 6 })); // false

console.log(Datamatch.isString('Hello', { minLength: 5 })); // true
console.log(Datamatch.isString('Hello', { minLength: 6 })); // false

console.log(Datamatch.isArray([ 1, 2, 3, 4, 5 ], { minLength: 5 })); // true
console.log(Datamatch.isArray([ 1, 2, 3, 4, 5 ], { minLength: 6 })); // false

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maxLength

console.log(Datamatch.isNumber(9, { maxLength: 1 })); // true
console.log(Datamatch.isNumber(9, { maxLength: 0 })); // false

console.log(Datamatch.isBigInt(BigInt('12345'), { maxLength: 5 })); // true
console.log(Datamatch.isBigInt(BigInt('12345'), { maxLength: 4 })); // false

console.log(Datamatch.isString('Hello', { maxLength: 5 })); // true
console.log(Datamatch.isString('Hello', { maxLength: 4 })); // false

console.log(Datamatch.isArray([ 1, 2, 3, 4, 5 ], { maxLength: 5 })); // true
console.log(Datamatch.isArray([ 1, 2, 3, 4, 5 ], { maxLength: 4 })); // false

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values

console.log(Datamatch.isNumber(77, { values: [ 53, 77, 99 ] })); // true
console.log(Datamatch.isNumber(77, { values: [ 53, 99 ] })); // false

console.log(Datamatch.isBigInt(BigInt('77'), { values: [ BigInt('77'), BigInt('99') ] })); // true
console.log(Datamatch.isBigInt(BigInt('77'), { values: [ BigInt('99') ] })); // false

console.log(Datamatch.isString('Hello', { values: [ 'Hello', 'Bye' ] })); // true
console.log(Datamatch.isString('Hello', { values: [ 'Bye' ] })); // false

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isDate (option)

If string value is date (true), you can safely use 'new Date(value)' without fear of errors.

console.log(Datamatch.isString('Thu, 31 Oct 2024 07:28:00 GMT', { isDate: true })); // true
console.log(Datamatch.isString('Thu, 32 Oct 2024 07:28:00 GMT', { isDate: true })); // false

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isDomain

console.log(Datamatch.isString('www.example.com', { isDomain: true })); // true
console.log(Datamatch.isString('example.com', { isDomain: true })); // true
console.log(Datamatch.isString('[email protected]', { isDomain: true })); // false

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isUrl

If string value is url (true), you can safely use '...new URL(value)...' without fear of errors.

console.log(Datamatch.isString('https://www.example.com', { isUrl: true })); // true
console.log(Datamatch.isString('https://example.com', { isUrl: true })); // true
console.log(Datamatch.isString('example.com', { isUrl: true })); // false

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isHTTPUrl

If string value is HTTP url (true), you can safely use '...new URL(value)...' without fear of errors.

console.log(Datamatch.isString('http://www.example.com', { isHTTPUrl: true })); // true
console.log(Datamatch.isString('http://example.com', { isHTTPUrl: true })); // true
console.log(Datamatch.isString('https://example.com', { isHTTPUrl: true })); // false

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isHTTPSUrl

If string value is HTTPS url (true), you can safely use '...new URL(value)...' without fear of errors.

console.log(Datamatch.isString('https://www.example.com', { isHTTPSUrl: true })); // true
console.log(Datamatch.isString('https://example.com', { isHTTPSUrl: true })); // true
console.log(Datamatch.isString('http://example.com', { isHTTPSUrl: true })); // false

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isWSUrl

If string value is WS url (true), you can safely use '...new URL(value)...' without fear of errors.

console.log(Datamatch.isString('ws://www.example.com', { isWSUrl: true })); // true
console.log(Datamatch.isString('ws://example.com', { isWSUrl: true })); // true
console.log(Datamatch.isString('wss://example.com', { isWSUrl: true })); // false

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isWSSUrl

If string value is WSS url (true), you can safely use '...new URL(value)...' without fear of errors.

console.log(Datamatch.isString('wss://www.example.com', { isWSSUrl: true })); // true
console.log(Datamatch.isString('wss://example.com', { isWSSUrl: true })); // true
console.log(Datamatch.isString('ws://example.com', { isWSSUrl: true })); // false

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isIP

console.log(Datamatch.isString('192.168.0.1', { isIP: true })); // true
console.log(Datamatch.isString('2001:0db8:85a3:0000:0000:8a2e:0370:7334', { isIP: true })); // true
console.log(Datamatch.isString('192.168.0.256', { isIP: true })); // false

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isIPv4

console.log(Datamatch.isString('192.168.0.1', { isIPv4: true })); // true
console.log(Datamatch.isString('2001:0db8:85a3:0000:0000:8a2e:0370:7334', { isIPv4: true })); // false
console.log(Datamatch.isString('192.168.0.256', { isIPv4: true })); // false

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isIPv6

console.log(Datamatch.isString('2001:0db8:85a3:0000:0000:8a2e:0370:7334', { isIPv6: true })); // true
console.log(Datamatch.isString('192.168.0.1', { isIPv6: true })); // false
console.log(Datamatch.isString('192.168.0.256', { isIPv6: true })); // false

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isJSON

console.log(Datamatch.isString('{"login":"john"}', { isJSON: true })); // true
console.log(Datamatch.isString('{"login":"john', { isJSON: true })); // false

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isBase64

console.log(Datamatch.isString('SGVsbG8=', { isBase64: true })); // true
console.log(Datamatch.isString('SGVs', { isBase64: true })); // false

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isFloat

If string value is float (true), you can safely use 'parseFloat(value)' without fear of errors.

console.log(Datamatch.isNumber(0.34, { isFloat: true })); // true
console.log(Datamatch.isNumber(2, { isFloat: true })); // false

console.log(Datamatch.isString('0.34', { isFloat: true })); // true
console.log(Datamatch.isString('00.34', { isFloat: true })); // false
console.log(Datamatch.isString('0,34', { isFloat: true })); // false
console.log(Datamatch.isString('2', { isFloat: true })); // false

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isInt

If string value is int (true), you can safely use 'parseInt(value)' without fear of errors.

console.log(Datamatch.isNumber(2, { isInt: true })); // true
console.log(Datamatch.isNumber(0.34, { isInt: true })); // false

console.log(Datamatch.isString('2', { isInt: true })); // true
console.log(Datamatch.isString('02', { isInt: true })); // true
console.log(Datamatch.isString('0.34', { isInt: true })); // false
console.log(Datamatch.isString('0,34', { isInt: true })); // false
console.log(Datamatch.isString('00.34', { isInt: true })); // false

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isNumeric

Contains 'isFloat' + 'isInt' logic.

console.log(Datamatch.isNumber(2, { isNumeric: true })); // true
console.log(Datamatch.isNumber(0.34, { isNumeric: true })); // true
console.log(Datamatch.isNumber(NaN, { isNumeric: true })); // false

console.log(Datamatch.isString('2', { isNumeric: true })); // true
console.log(Datamatch.isString('02', { isNumeric: true })); // true
console.log(Datamatch.isString('0.34', { isNumeric: true })); // true
console.log(Datamatch.isString('0,34', { isNumeric: true })); // false
console.log(Datamatch.isString('00.34', { isNumeric: true })); // false
console.log(Datamatch.isString('NaN', { isNumeric: true })); // false

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License

Datamatch is released under the MIT License.

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