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x/cliffy/dev_deps.ts>assertInstanceOf

Command line framework for deno 🦕 Including Commandline-Interfaces, Prompts, CLI-Table, Arguments Parser and more...
c4spar/deno-cliffy
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function assertInstanceOf
import { assertInstanceOf } from "https://deno.land/x/cliffy@v1.0.0-rc.4/dev_deps.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@0.224.0/assert/assert_instance_of.ts";

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

Type Parameters

T extends AnyConstructor

Parameters

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

Returns

asserts actual is GetConstructorType<T>