Utils

Utils module provides generic helper functions.

isNullish

Checks if the given value is null or undefined.

function isNullish(value: unknown): value is undefined | null

import { isNullish } from '@globalbrain/sefirot/lib/support/Utils'

isNullish(undefined) // <- true
isNullish(null)      // <- true
isNullish('')        // <- false

isString

Checks if the given value is string.

function isString(value: unknown): value is string

import { isString } from '@globalbrain/sefirot/lib/support/Utils'

isString('abc') // <- true

isNumber

Checks if the given value is number.

function isNumber(value: unknown): value is number

import { isNumber } from '@globalbrain/sefirot/lib/support/Utils'

isNumber(123) // <- true

isArray

Checks if the given value is array.

function isArray(value: unknown): value is unknown[]

import { isArray } from '@globalbrain/sefirot/lib/support/Utils'

isArray([1, 2, 3]) // <- true

isObject

Checks if the given value is object. this function will return false for null and array.

function isObject(value: unknown): value is Record<string, any>

import { isObject } from '@globalbrain/sefirot/lib/support/Utils'

isObject({ foo: 'bar' }) // <- true
isObject([1, 2, 3])      // <- false
isObject(null)           // <- false

isFile

Checks if the given value is File.

function isFile(value: unknown): value is File

import { isFile } from '@globalbrain/sefirot/lib/support/Utils'

isFile(file)