Remove support for renderMode from FlexForm and force usage of renderType?
TYPO3 version should probably be selected as 11, not possible, so I selected 10.
In TYPO3 9.5 this still works if used in a Flexform for type select:
<settings.whatever> <TCEforms> <label>whatever</label> <config> <type>select</type> <items type="array"> <numIndex index="0" type="array"> <numIndex index="0">first option</numIndex> <numIndex index="1">1</numIndex> </numIndex> <!-- etc --> </items> <size>15</size> <maxitems>100</maxitems> <renderMode>singlebox</renderMode> </config> </TCEforms> </settings.whatever>
"Using the TCA field type `select` without specifying a valid `renderType` has been marked as deprecated. Additionally the usage of renderMode for select fields has been marked as deprecated." (since 7.6)
#1 Updated by Sybille Peters 9 months ago
See also documentation issue: https://github.com/TYPO3-Documentation/TYPO3CMS-Reference-TCA/issues/257