Skip to main content
Deno 2 is finally here 🎉️
Learn more
Module

std/assert/assert_instance_of.ts>assertInstanceOf

Deno standard library
denoland/deno_std
Go to Latest
The Standard Library has been moved to JSR. See the blog post for details.
function assertInstanceOf
import { assertInstanceOf } from "https://deno.land/std@0.221.0/assert/assert_instance_of.ts";

Make an assertion that obj is an instance of type. If not then throw.

Examples

Example 1

import { assertInstanceOf } from "https://deno.land/std@0.221.0/assert/assert_instance_of.ts";

assertInstanceOf(new Date(), Date); // Doesn't throw
assertInstanceOf(new Date(), Number); // Throws

Parameters

actual: unknown
expectedType: T
optional
msg = [UNSUPPORTED]

Returns

asserts actual is GetConstructorType<T>