---
title: "Breaking: #73719 - Unused JavaScript configuration options for the Backend removed"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-73719"
source: "Changelog/8.0/Breaking-73719-UnusedJavaScriptConfigurationOptionsForTheBackendRemoved.rst"
typo3-version: "8.0"
typo3-major: 8
type: "breaking"
issue: 73719
forge: "https://forge.typo3.org/issues/73719"
tags: ["JavaScript", "Backend"]
rendered: "2026-09-17T12:41:04+00:00"
---

# Breaking: #73719 - Unused JavaScript configuration options for the Backend removed {#breaking-73719-unused-javascript-configuration-options-for-the-backend-removed}

See [forge#73719](https://forge.typo3.org/issues/73719)

## Description {#description}

The following JavaScript options from TYPO3.configuration and the global JavaScript property `TS` have been removed:

```javascript
TYPO3.configuration.PATH_typo3
TYPO3.configuration.PATH_typo3_enc
TYPO3.configuration.userUid
TYPO3.configuration.securityLevel
TYPO3.configuration.TYPO3_mainDir
TYPO3.configuration.veriCode
TYPO3.configuration.denyFileTypes
TS.PATH_typo3
TS.PATH_typo3_enc
TS.securityLevel
TS.veriCode
TS.denyFileTypes
TS.decimalSign
```

## Impact {#impact}

Calling any of the JavaScript options above from within JavaScript will result in a undefined JavaScript error.

## Affected Installations {#affected-installations}

Any TYPO3 installation using a legacy TYPO3 extension that uses these options within JavaScript.

## Migration {#migration}

Remove the values from the JavaScript code or provide a PHP alternative to make the options available again for
JavaScript, if needed.