Custom Javascript or PHP for Mandatory(required) Checkboxes - PLEASE

I was wondering if one of you genius' can help me manipulate the following code, or come up with an entirely new code to add to the custom css section of my website plugin. I would like to make the "optional extras" checkboxes on this hotel booking plugin "mandatory or required" instead of just an option. I need the checkboxes to be required before they can book the hotel room. Is there any way someone can please help me out? this is the apb-list-package.php code for awebooking plugin for wordpress.

<?php
if ( ! defined( 'ABSPATH' ) ) {
exit;
}

/**
* The template for displaying loop package of room.
*
* Override this template by copying it to your theme
*
* @author AweTeam
* @package AweBooking/Templates
* @version 1.0
*/

?>
<div class="apb-room_package">
<a data-toggle="collapse" href="#apb-room_packge-<?php the_ID() ?>" class="apb-room_package-more"><?php esc_html_e( 'Optional extras', 'awebooking' ); ?></a>
<div class="collapse apb-room_package-content" id="apb-room_packge-<?php the_ID(); ?>">
<?php foreach ( $get_option as $item_option ) : ?>
<!-- ITEM PACKGE -->
<div class="apb-package_item">
<div class="apb-package_img">
<?php
if ( true == $argsData['check'] ) {
printf('<input class="package-check-js id-option-js-%d" id="package-%d" data-option_id="%d" data-id="%d" data-pricing="%d" data-daily="%d" data-days="%d" value="%s" type="checkbox">',
absint( $item_option->id ),
absint( $item_option->id ),
absint( $item_option->id ),
absint( get_the_ID() ),
( float ) $item_option->option_value,
absint( $item_option->revision_id ),
isset( $argsData['count_day'] ) ? absint( $argsData['count_day'] ) : 1,
esc_attr( $item_option->option_operation )
);
}
?>
</div>
<div class="apb-package_text">
<h4>
<label for="package-<?php echo esc_attr( $item_option->id ) ?>"><?php echo esc_html( $item_option->option_name ); ?></label>
</h4>
<p><?php echo esc_html( $item_option->option_desc ); ?></p>
<div class="apb-select-package">
<?php
if ( true == $argsData['check'] ) {
printf('<input class="number-of-packages package-option-id-%d" data-id="%d" data-option_id="%d" data-pricing="%d" data-operation="%s" type="%s" size="5" value="%d" placeholder="%s" name="num_package">',
absint( $item_option->id ),
absint( get_the_ID() ),
absint( $item_option->id ),
$item_option->option_value,
$item_option->option_operation,
( 1 == $item_option->revision_id ) ? 'hidden' : 'text',
( 1 == $item_option->revision_id && isset( $argsData['count_day'] ) ) ? $argsData['count_day'] : 1,
esc_attr__( 'Number', 'AweBooking' )
);
}
?>
</div>

<div class="apb-package_book-price">
<p class="apb-package_price">
<span class="amount">
<?php echo wp_kses_post( AWE_function::apb_price( $item_option->option_value ) ); ?>
</span> / <?php ( 1 == $item_option->revision_id ) ? esc_html_e( 'day', 'awebooking' ) : esc_html_e( 'package', 'awebooking' ); ?>
</p>
</div>
</div>
</div>
<!-- END / ITEM PACKGE -->
<?php endforeach; ?>
</div>
</div>