---
title: "Breaking: #60559 - T3skin Backend Login Javascript File Moved"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-60559-1668719172"
source: "Changelog/7.0/Breaking-60559-T3skinBackendLoginJavascriptFileMoved.rst"
typo3-version: "7.0"
typo3-major: 7
type: "breaking"
issue: 60559
forge: "https://forge.typo3.org/issues/60559"
tags: ["JavaScript", "ext:t3skin", "Backend"]
rendered: "2026-09-20T18:31:11+00:00"
---

# Breaking: #60559 - T3skin Backend Login Javascript File Moved {#breaking-60559-1668719172}

See [forge#60559](https://forge.typo3.org/issues/60559)

## Description {#description}

Javascript files of the backend login form moved from EXT:t3skin to EXT:backend.

## Impact {#impact}

Javascript or file not found errors.

## Affected installations {#affected-installations}

An installation is affected if a 3rd party extension includes EXT:t3skin/Resources/Public/JavaScript/login.js

## Migration {#migration}

Include EXT:backend/Resources/Public/JavaScript/login.js instead or refactor the affected extension to free it
from the dependency to this core internal file.