I am working on a Symfony form where it must have a dropdown with checkboxes to select multiple values. However choice and entity input types have 'multiple' and 'expanded' attributes which cannot produce what I need. Shown below is my requirement.
Here's how my form is:
$form = $this->createFormBuilder()
->add('features', 'choice', array('choices'=>array('a','b','c'), 'multiple'=> true))
->getForm();
Above code produces an expanded dropdown with a multi select.
you have to use a JS library like https://github.com/ehynds/jquery-ui-multiselect-widget.
You can find the answer here : How to use Checkbox inside Select Option
for creating check box with opportunity check one box, you can use this
$builder
->add('check_box', ChoiceType::class, [
'label' => 'status',
'multiple' => false,
'expanded' => false,
'choices' => [a, b, c],
'translation_domain' => 'common',
'label_attr' => ['class' => 'cursor_text'],
'attr' => [
'style' => 'some style'
]
]);
