Basic form elements

Select expanded
Options : ['expanded' => true]
Options : ['multiple' => true]
Select multiple expanded
Options : ['multiple' => true, 'expanded' => true]

Addon form extension

@
Options : ['input_prefix_text' => '@']
Options : ['input_suffix' => '<button class="btn btn-secondary">Click</button>']
Options : ['input_addon_container_class' => 'input-icon', 'input_prefix' => '<span class="input-icon-addon"><i class="mdi mdi-magnify"></i></span>'

Advanced form elements

DatePickerType - use flatpickr js libarary
Options : ['enable_time' => true]
CkeditorType - use ckeditor js libarary

File form elements

Read more about How to upload file
VichFileType
Read more about VichUploaderBundle

Collection form elements

UmbrellaCollectionType (extends CollectionType)
Collection items
Label Date
Collection orderable items
Label Date
Options : ['sort_by' => 'order']