The default transformation will be uppercase as in mb_convert_case [1]. Possible modes are: lower Transforms the input string to its lowercase representation upper Transforms the input string to its uppercase representation capital Transforms the input string to its first letter upper-cased, i.e. capitalization uncapital Transforms the input string to its first letter lower-cased, i.e. uncapitalization capitalWords Transforms the input string to each containing word being capitalized Note that the behavior will be the same as in the appropriate PHP function mb_convert_case [1]; especially regarding locale and multibyte behavior.
See also: http://php.net/manual/function.mb-convert-case.php [1] = Examples = Some Text with miXed case SOME TEXT WITH MIXED CASE someString SomeString {article.title -> f:format.case(mode: 'capitalWords')} Dolphins Vanish After A Surprisingly Sophisticated Attempt To Do A Double Backward Somersault
Inheritance: extends Neos\FluidAdaptor\Core\ViewHelper\AbstractViewHelper
 /**
  * @test
  * @dataProvider conversionTestingDataProvider
  */
 public function viewHelperConvertsCorrectly($input, $mode, $expected)
 {
     $this->assertSame($expected, $this->viewHelper->render($input, $mode), sprintf('The conversion with mode "%s" did not perform as expected.', $mode));
 }