This allows for complete groups to become conditional on fields.

This presumes PR CMB2/CMB2#582 has been merged into CMB2.

Fixes jcchavezs#2.

The js side of things is working.

@todo Needs checking if any more filtering for saving needs to be done on the PHP side of things.

cmb2-conditionals.php

@@ -22,6 +22,7 @@ function cmb2_conditionals_load_actions()
 
 	add_action('admin_init', 'cmb2_conditionals_hook_data_to_save_filtering', CMB2_CONDITIONALS_PRIORITY);
 	add_action('admin_footer', 'cmb2_conditionals_footer', CMB2_CONDITIONALS_PRIORITY);
+	add_action('cmb2_additional_group_attributes', 'cmb2_conditionals_group_attributes', CMB2_CONDITIONALS_PRIORITY, 3);
 }
 
 /**
@@ -38,6 +39,18 @@ function cmb2_conditionals_footer()
 	wp_enqueue_script('cmb2-conditionals', plugins_url('/cmb2-conditionals.js', __FILE__ ), array('jquery'), '1.0.2', true);
 }
 
+function cmb2_conditionals_group_attributes( $attr_string, $group_args, $group_id ) {
+	if(!isset($group_args['attributes']['data-conditional-id'])) {
+		return $attr_string;
+	}
+
+	$attr_string .= ' data-conditional-id="'.esc_attr($group_args['attributes']['data-conditional-id']).'"';
+	if(isset($group_args['attributes']['data-conditional-value'])) {
+		$attr_string .= ' data-conditional-value="'.esc_attr($group_args['attributes']['data-conditional-value']).'"';
+	}
+	return $attr_string;
+}
+
 /**
  * Hooks the filtering of the data being saved.
  */