Standard Assertions (@std/assert)
Overview
A library of assertion functions. If the assertion is false an AssertionError will be thrown which will result in pretty-printed diff of the failing assertion.
This module is browser compatible, but do not rely on good formatting of values for AssertionError messages in browsers.
import { assert } from "@std/assert";
assert("I am truthy"); // Doesn't throw
assert(false); // Throws `AssertionError`
Add to your project
›_
deno add jsr:@std/assert
© 2018–2025 the Deno authors
Licensed under the MIT License.
https://docs.deno.com/runtime/reference/std/assert
