How to display a datepicker on Symfony?

I want to set up a date-picker for my date type fields based on symfony documentation. I have installed the package since packagist 'eternicode / bootstrap-datepicker'. I am able to apply my defined conditions for entering the date field in my js (like the date format) but the display is still impossible. I do not have an error message in my js console. I don't even see the datepikcer component..

My Form Type:

   ->add('date_entree', DateType::class, [ 'widget' => 'single_text',    'html5' => false,    'attr' => ['class' => 'js-datepicker'],                ])My JS:    $(document).on('ready', function() {         $('.js-datepicker').datepicker({              format: 'dd-mm-yyyy',         });     });

Have you please an idea about this issue?