1

Using Drupal Console, I created a custom content entity in which there is a 'date' field:

$fields['subscription_date'] = BaseFieldDefinition::create('datetime')  
  ->setLabel(t('Date souscription'))  
  ->setSetting('datetime_type', 'date')  
  ->setDefaultValue(array(0 => array(  
    'default_date_type' => 'now',  
    'default_date' => 'now',  
  )))  

The edit-form works as supposed and, particularly, editing 'subscription_date' brings up the calendar popup:
enter image description here
In my custom module, I defined a table form to 'mass' edit this entity:
I defined the date field in the form this way:

$form['souscriptions'][$key]['date'] = array(  
    '#type' => 'date',  
    '#default_value' => $default_value,  
);  

In Firefox, it looks like:
enter image description here and editing a date field doesn't show the date popup :-(
While in Chrome, it's OK:
enter image description here Any idea why?
What should I add to my form to have at least the simple calendar popup I have in my content entity edit-form?

Forgot to say: i'm using Drupal 8.4.2

1

This issue is coming because of jQuery confliction. Either you can update jQuery version or find out the confliction of jquery object.

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