assertExists | /testing/asserts.ts | std@0.123.0

Deno standard library

The Standard Library has been moved to JSR. See the blog post for details.

function assertExists

import { assertExists } from "https://deno.land/std@0.123.0/testing/asserts.ts";

assertExists<T>(actual: T, msg?: string): asserts actual is NonNullable<T>

Make an assertion that actual is not null or undefined. If not then throw.

Type Parameters

actual: T

optional

msg: string

asserts actual is NonNullable<T>