function FormTestOptionalContainerForm::buildForm

Overrides FormInterface::buildForm

File

core/modules/system/tests/modules/form_test/src/Form/FormTestOptionalContainerForm.php, line 25

Class

FormTestOptionalContainerForm

Builds a simple form to test the #optional property on #type 'container'.

Namespace

Code

public function buildForm(array $form, FormStateInterface $form_state) {
    // Empty containers.
    $form['empty_optional'] = [
        '#type' => 'container',
        '#attributes' => [
            'class' => [
                'empty_optional',
            ],
        ],
        '#optional' => TRUE,
    ];
    $form['empty_nonoptional'] = [
        '#type' => 'container',
        '#attributes' => [
            'class' => [
                'empty_nonoptional',
            ],
        ],
        '#optional' => FALSE,
    ];
    // Non-empty containers
    $form['nonempty_optional'] = [
        '#type' => 'container',
        '#attributes' => [
            'class' => [
                'nonempty_optional',
            ],
        ],
        '#optional' => TRUE,
    ];
    $form['nonempty_optional']['child_1'] = [];
    $form['nonempty_nonoptional'] = [
        '#type' => 'container',
        '#attributes' => [
            'class' => [
                'nonempty_nonoptional',
            ],
        ],
        '#optional' => FALSE,
    ];
    $form['nonempty_nonoptional']['child_2'] = [];
    return $form;
}