---
title: "Breaking: #88427 - jsfunc.evalfield.js has been removed"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-88427"
source: "Changelog/10.0/Breaking-88427-JsfuncevalfieldjsHasBeenRemoved.rst"
modified: "2026-09-15T10:46:36+00:00"
---

# Breaking: #88427 - jsfunc.evalfield.js has been removed

See [forge#88427](https://forge.typo3.org/issues/88427)

## Description

The file `jsfunc.evalfield.js`, responsible for form value evaluation and validation, has been removed. This job is
now done by `TYPO3/CMS/Backend/FormEngineValidation` since TYPO3 7.4.

## Impact

Extensions still relying on this file and its API will not work anymore.

## Affected Installations

All installations with third party extensions using this API are affected.

## Migration

In most cases no migration is necessary, unless this API is used in a custom built form. In such case, migrate to
FormEngine API to automatically use the new API.