type-checks

A collection of JavaScript type checks, written in TypeScript.

Install

Install via npm:

npm install @amandaghassaei/type-checks

import { isNumber, isInteger } from '@amandaghassaei/type-checks';

Table of contents

Functions

• isNumber
• isFiniteNumber
• isInteger
• isPositiveNumber
• isPositiveInteger
• isNegativeNumber
• isNegativeInteger
• isNonNegativeNumber
• isNonNegativeInteger
• isNonPositiveNumber
• isNonPositiveInteger
• isNumberInRange
• isIntegerInRange
• isString
• isTypedArray
• isArray
• isObject
• isBoolean

Functions

isNumber

▸ isNumber(value): boolean

Checks if value is a number (including Infinity).

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isFiniteNumber

▸ isFiniteNumber(value): boolean

Checks if value is finite number.

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isInteger

▸ isInteger(value): boolean

Checks if value is integer.

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isPositiveNumber

▸ isPositiveNumber(value): boolean

Checks if value is positive number (> 0).

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isPositiveInteger

▸ isPositiveInteger(value): boolean

Checks if value is positive integer (> 0).

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isNegativeNumber

▸ isNegativeNumber(value): boolean

Checks if value is negative number (< 0).

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isNegativeInteger

▸ isNegativeInteger(value): boolean

Checks if value is negative integer (< 0).

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isNonNegativeNumber

▸ isNonNegativeNumber(value): boolean

Checks if value is non-negative number (>= 0).

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isNonNegativeInteger

▸ isNonNegativeInteger(value): boolean

Checks if value is non-negative integer (>= 0).

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isNonPositiveNumber

▸ isNonPositiveNumber(value): boolean

Checks if value is non-positive number (<= 0).

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isNonPositiveInteger

▸ isNonPositiveInteger(value): boolean

Checks if value is non-positive integer (<= 0).

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isNumberInRange

▸ isNumberInRange(value, min, max): boolean

Checks if value is number in range [min, max].

Parameters

| Name | Type | | :------ | :------ | | value | any | | min | number | | max | number |

Returns

boolean

isIntegerInRange

▸ isIntegerInRange(value, min, max): boolean

Checks if value is integer in range [min, max].

Parameters

| Name | Type | | :------ | :------ | | value | any | | min | number | | max | number |

Returns

boolean

isString

▸ isString(value): boolean

Checks if value is string.

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isTypedArray

▸ isTypedArray(value): boolean

Checks if value is TypedArray.

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isArray

▸ isArray(value): boolean

Checks if value is Array or TypedArray.

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isObject

▸ isObject(value): boolean

Checks if value is Javascript object.

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean

isBoolean

▸ isBoolean(value): boolean

Checks if value is boolean.

Parameters

| Name | Type | | :------ | :------ | | value | any |

Returns

boolean