Typechecks - v1.0.4

Description

This package provides a number of functions to check if a variable in JavaScript or TypeScript is of a certain type.

The available functions are:

isNotNullOrUndefined

usage:

isNotNullOrUndefined(value)

This function checks if a value is not null or undefined and returns true if it is, otherwise false

isNullOrUndefined

isNullOrUndefined(value)

This function checks if a value is null or undefined and returns true if it is, otherwise false

isNull

usage:

isNull(value)

This function checks if a value is null and returns true if it is, otherwise false

isUndefined

usage:

isUndefined(value)

This function checks if a value is undefined and returns true if it is, otherwise false

isFinite

usage:

isFinite(value)

This function checks if a value is a number, and if it is finite and returns true if it is, otherwise false

isInfinite

usage:

isInfinite(value)

This function checks if a value is a number, and if it is infinite and returns true if it is, otherwise false

isInteger

usage:

isInteger(value)

This function checks if a value is an integer and returns true if it is, otherwise false

isNaN

usage:

isNaN(value)

This function checks if a value is a number, but is a NaN value - it returns true if it is, otherwise false

isNotInteger

usage:

isNotInteger(value)

This function checks if a value is a number, but is not an integer and returns true if it is, otherwise false

isNotNan

usage:

isNotNan(value)

This fuction checks if a value is a number, but is not a NaN value - it returns true if it is, otherwise false

isNumber

usage:

isNumber(value)

This function checks if a value is a number and returns true if it is, otherwise false

isObject

usage:

isObject(value)

This function checks if a value is an object and returns true if it is, otherwise false[^1]

isEmptyOrWhitespace

usage:

isEmptyOrWhitespace(value)

This function checks if a value is a string, and is empty or whitespace - if it is, it returns true, otherwise false

isEmptyString

usage:

isEmptyString(value)

This function checks if a value is a string, but is empty and returns true if it is, otherwise false

isNotEmptyOrWhitespace

usage:

isNotEmptyOrWhitespace(value)

This function checks if a value is a string, and is not empty or whitespace - it returns true if it is, otherwise false

isNotEmptyString

usage:

isNotEmptyString(value)

This function checks if the value is a string and is not empty (but it can be whitespace) - it returns true if it is, otherwise false

isString

usage:

isString(value)

This function checks if the value is a string and returns true if it is, otherwise false

isArray

usage:

isArray(value)

This function checks if the value is an array and returns true if it is, otherwise false

isNumberArray

usage:

isNumberArray(value)

This function checks if the value is an array of numbers and returns true if it is, otherwise false

isObjectArray

usage:

isObjectArray(value)

This function checks if the value is an array of objects and returns true if it is, otherwise false

isStringArray

isStringArray(value)

This function checks if the value is an array of strings and returns true if it is, otherwise false

isBoolean

isBoolean(value)

This function checks if the value is a boolean value and returns true if it is, otherwise false

[^1]: Assertion of a specific object type is not currently possible