--- title: "Standard Assertions (@std/assert)" description: "Common assertion functions, especially useful for testing" jsr: jsr:@std/assert pkg: assert version: 1.0.19 generated: true stability: stable --- ## 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.

```js import { assert } from "@std/assert"; assert("I am truthy"); // Doesn't throw assert(false); // Throws `AssertionError` ``` ### Add to your project ```sh deno add jsr:@std/assert ``` See all symbols in @std/assert on