Display Jetpack's cookie notice on themes without a widget area

jetpack-cookie-widget-without-widget-areas.php

<?php

/**
 * Class to add Jetpack's Cookie Notice Widget without needing a widget area
 */
class Cameronjonesweb_Jetpack_Cookie_Notice {
	
	/**
	 * Instance of Jetpack's cookie notice widget.
	 *
	 * @var Jetpack_EU_Cookie_Law_Widget
	 */
	public $widget;
	
	/**
	 * Class constructor
	 */
	public function __construct() {
		add_action( 'widgets_init', [ $this, 'initialise_cookie_notice' ] );
		add_action( 'wp_footer', [ $this, 'display_cookie_notice' ] );
	}
	
	/**
	 * Sets up Jetpack's cookie notice
	 */
	public function initialise_cookie_notice() {
		if ( class_exists( 'Jetpack_EU_Cookie_Law_Widget' ) ) {
			$this->widget = new Jetpack_EU_Cookie_Law_Widget();
			add_action( 'wp_enqueue_scripts', [ $this->widget, 'enqueue_frontend_scripts' ] );
		}
	}

	/**
	 * Displays the widget on the front end
	 */
	public function display_cookie_notice() {
		if ( class_exists( 'Jetpack_EU_Cookie_Law_Widget' ) ) {
			$args     = [
				'before_widget' => '<div class="widget_eu_cookie_law_widget">',
				'after_widget'  => '</div>',
			];
			$instance = [];
			$this->widget->widget( $args, $instance );
		}
	}
}

new Cameronjonesweb_Jetpack_Cookie_Notice();