assertExists | /http/server/deps.ts | fastro@v0.84.23

x/fastro/http/server/deps.ts>assertExists

Full Stack Framework for Deno, TypeScript, Preact JS and Tailwind CSS

function assertExists

import { assertExists } from "https://deno.land/x/fastro@v0.84.23/http/server/deps.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.

Examples

Example 1

import { assertExists } from "https://deno.land/std@0.224.0/assert/assert_exists.ts";

assertExists("something"); // Doesn't throw
assertExists(undefined); // Throws

Type Parameters

Parameters

actual: T

optional

msg: string

Returns

asserts actual is NonNullable<T>