Compatibility

Feed Display is maintained for TYPO3 v13 and TYPO3 v14. The local package metadata is the authoritative source for the supported version range.

Requirement	Composer package	TER metadata
TYPO3	`^13.4 \|\| ^14.3`	`13.4.0-14.3.99`
PHP	`>=8.2 <8.6`	`8.2.0-8.5.99`

TYPO3 v13 and v14 use the same extension runtime code. The frontend plugin, TypoScript settings, Site Set, FlexForm settings, PSR-14 event and Fluid templates are available in both supported TYPO3 major versions.

Backend module names

TYPO3 v14 renamed and regrouped several backend modules. Feed Display keeps the same feature set, but the navigation paths used in this manual differ by TYPO3 version.

Task	TYPO3 v13	TYPO3 v14
Assign the Site Set	Site Management → Sites	Sites → Setup
Inspect or edit TypoScript records	Site Management → TypoScript	Sites → TypoScript
Create or edit the Feed Display content element	Web → Page	Content → Layout
Compare and update database schema	Admin Tools → Maintenance	System → Maintenance
Run upgrade wizards	Admin Tools → Upgrade	System → Upgrade
View or install extensions in classic mode	Admin Tools → Extensions	System → Extensions

Site Set and static TypoScript

For TYPO3 v13 and v14, the recommended integration is the Site Set erhaweb/feed-display. It ships the extension TypoScript and typed Site Settings from Configuration/Sets/FeedDisplay/. See Site Set and settings for setup details.

The extension still registers a static TypoScript include for installations that use TypoScript template records. This is a compatibility fallback for migrated projects that have not yet moved their configuration to Site Sets.

Plugin content element migration

Older Feed Display versions registered the plugin as an Extbase plugin subtype:

CType = list
list_type = feeddisplay_pi1

TYPO3 v13.4 deprecates this subtype model and TYPO3 v14 requires plugins to be registered as dedicated content element types. Feed Display therefore now uses:

CType = feeddisplay_pi1

The extension provides the upgrade wizard feedDisplayCTypeMigration. Run it after updating the extension in projects that already contain Feed Display content elements. The wizard migrates existing tt_content records and backend group permissions from the old list_type registration to the new CType. The Upgrade module and CLI commands are available when TYPO3's Install system extension is installed.

The Page TSconfig preview path changed accordingly:

TYPO3 area	Old value	New value
Content element type	`CType = list`, `list_type = feeddisplay_pi1`	`CType = feeddisplay_pi1`
Backend preview TSconfig	`mod.web_layout.tt_content.preview.list.feeddisplay_pi1`	`mod.web_layout.tt_content.preview.feeddisplay_pi1`

Project-specific Page TSconfig or migration scripts that referenced the old list_type must be adjusted to the new CType value.

Version-specific implementation notes

The code intentionally contains two TYPO3 version compatibility guards:

TYPO3 v14 can register a FlexForm directly with ExtensionUtility::registerPlugin(), while TYPO3 v13 still needs ExtensionManagementUtility::addPiFlexFormValue() for the same dedicated CType. This guard avoids the TYPO3 v14 deprecation while keeping TYPO3 v13 fully supported.
The list-type-to-CType upgrade helper moved from the Install namespace in TYPO3 v13 to the Core namespace in TYPO3 v14. The local abstract upgrade base chooses the available parent class at runtime.

Date formatting uses formats compatible with PHP's DateTimeInterface::format(). Existing project configuration using old strftime() style percent formats should be changed, for example from %d. %B %Y to d. F Y.