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@std/assert@0.215.0

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Works with
It is unknown whether this package works with Browsers, Deno, Node.js, Cloudflare Workers, Bun
It is unknown whether this package works with Browsers
It is unknown whether this package works with Deno
It is unknown whether this package works with Node.js
It is unknown whether this package works with Cloudflare Workers
It is unknown whether this package works with Bun
•JSR Score70%•
Published2 years ago (0.215.0)
function assertInstanceOf
assertInstanceOf<T extends AnyConstructor>(
actual: unknown,
expectedType: T,
msg?
): asserts actual is GetConstructorType<T>

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

Examples

Example 1

import { assertInstanceOf } from "@std/assert/assert_instance_of";

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

Type Parameters

T extends AnyConstructor

Parameters

actual: unknown
expectedType: T
optional
msg

Return Type

asserts actual is GetConstructorType<T>

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Add Package

deno add jsr:@std/assert

Import symbol

import { assertInstanceOf } from "@std/assert/assert_instance_of";
or

Import directly with a jsr specifier

import { assertInstanceOf } from "jsr:@std/assert/assert_instance_of";