---
title: "validate against whitelist · RUAL Documentation"
description: "Validates input against a whitelist of safe values, returning the input if safe or a fallback if not"
canonical: https://docs.rual.nl/block-types/value/value_validate_values
language: en
---

# validate against whitelist

This block is part of the [`value`](https://docs.rual.nl/block-types/value) group and was last modified in core [`v14.0.3`](https://docs.rual.nl/core-versions/140003).

Validates input against a whitelist of safe values, returning the input if safe or a fallback if not

- value `unsafe_value` required `value`

- allowed values `safe_array` required `array`

- fallback `fallback_value` `value`

- value `value`

| `safe values` |
| --- |
| `whitelist` |

### Core Releases