Breaking: #107537 - Changes in URL generation of system resources 

getText "path" in TypoScript 

page.20 = TEXT
page.20 {
    data = path : EXT:core/Resources/Public/Icons/Extension.svg
}

"path" result before: typo3/sysext/core/Resources/Public/Icons/Extension.svg
"path" result now: /typo3/sysext/core/Resources/Public/Icons/Extension.svg

"path" result before: _assets/5f237792cbcdc97cfceade1e16ea33d7/Icons/Extension.svg
"path" result now: /_assets/5f237792cbcdc97cfceade1e16ea33d7/Icons/Extension.svg

Relative path to FAL Storage 

Referencing resources via relative path does only work for the default FAL storage defined in $GLOBALS['TYPO3_CONF_VARS']['BE']['fileadminDir'] . This means if you have other local FAL storages configured, you need to use the FAL resource syntax (e.g. FAL:42:/path/to/file.css) to reference files in such storage instead of using relative paths (e.g. my-other-fileadmin/path/to/file.css). It is generally recommended to use explicit resource identifiers (App resources or FAL resources), instead of relative paths.

All generated URLs now contain cache busting 

All URLs now have cache busting applied. This means URLs that had no cache busting applied, like Icon URLs will now have cache busting applied.

Additional query strings applied to the resource identifier 

When adding a query string to a resource identifier, previously the cache busting was disabled. Now the query string is respected, but cache busting is added as well. It is recommended to drop the custom query string, when it was used for cache busting in places TYPO3 did not include cache busting previously.

page.20 = TEXT
page.20 {
    data = asset : EXT:core/Resources/Public/Icons/Extension.svg?v=1234
}

result before: /typo3/sysext/core/Resources/Public/Icons/Extension.svg?v=1234
result now: /typo3/sysext/core/Resources/Public/Icons/Extension.svg?v=1234&1709051481

getText "path" in TypoScript 

All installations using path of TypoScript data, will now have these usages resolved to absolute URLs, instead of relative.

Relative path to FAL Storage 

In installations referencing resources in additional local FAL storages using a relative path syntax, an exception is thrown.

All generated URLs now contain cache busting 

URLs slightly differ from previous TYPO3 versions, especially when cache busting was not applied previously.

Additional query strings applied to the resource identifier 

URLs differ from previous TYPO3 versions, as the cache busting is added additionally to the custom query string.

getText "path" in TypoScript 

All installations using path in TypoScript data.

Relative path to FAL Storage 

All installations referencing resources in additional local FAL storages using a relative path syntax (e.g. my-other-fileadmin/path/to/file.css).

All generated URLs now contain cache busting 

All installations having third party code, that misuses generated URLs to assume file system paths from them.

Additional query strings applied to the resource identifier 

All installations, that use resource identifiers with a custom query string, like EXT:foo/Resources/Public/rte.css?v=123

Relative path to FAL Storage 

Either convert the relative path to a FAL resource like so:

FAL:1:/path/to/file.css

Alternatively it is possible to convert it to a resource URI:

URI:/my-other-fileadmin/path/to/file.css

The first will add cache busting, the latter will use the URI as is.