---
title: assert
source: https://github.com/remix-run/remix/blob/remix@3.0.0-beta.3/packages/assert/src/lib/assert.ts#L403
---

# assert

## Summary

Alias for [`ok`](/api/remix/assert/function/ok/).

## Signature

```ts
const assert: (value: unknown, message: string) => asserts value;

```

## Parameters

### `value`

The value to test for truthiness.

### `message`

Optional failure message.