isNullable | /is_nullable.ts | isx@1.5.0

Collection of validation functions for JavaScript data

Latest

function isNullable

import { isNullable } from "https://deno.land/x/isx@1.5.0/is_nullable.ts";

isNullable(input: unknown): input is null | undefined

Whether the input is null or undefined or not.

Examples

Example 1

import { isNullable } from "https://deno.land/x/isx@$VERSION/is_nullable.ts"
import { assertEquals } from "https://deno.land/std/testing/asserts.ts"
assertEquals(isNullable(null), true)
assertEquals(isNullable(undefined), true)
assertEquals(isNullable({}), false)

Parameters

input: unknown

Any input.

Returns

input is null | undefined