Empty required fields only display error if we interact with them

[psaikali]

Version

• Carbon Fields: 3.0.0
• WordPress: 5.0.2
• PHP: 7.2

Expected Behavior

A Theme Options page should throw a JS error when trying to save an empty required field.

Actual Behavior

If we don't interact (focus/blur) on a required field and leave it empty, we can save the form without any error being displayed. Checking on the required fields should not only be triggered when the field is focused/blurred, but when the form is submitted.

Demo

Container definition

$theme_options = Container::make( 'theme_options', __( 'Lastweets', 'lastweets' ) );
+
$fields[] = Field::make( 'text', 'lastweet_consumer_key', __( 'Consumer API Key', 'lastweets' ) )->set_required();