public static function generate_js() {
		// Load core scripts so we can eliminate another stylesheet.
		$core_js = file_get_contents( Popup_Maker::$DIR . 'assets/js/site' . self::$suffix . '.js' );

		/**
		 *  0 Core
		 *  5 Extensions
		 *  8 Integrations
		 * 10 Per Popup JS
		 */
		$js = array(
			'core' => array(
				'content'  => $core_js,
				'priority' => 0,
			),
		);

		$popups = pum_get_all_popups();

		if ( ! empty( $popups ) ) {
			foreach ( $popups as $popup ) {
				// Set this popup as the global $current.
				pum()->current_popup = $popup;

				// Preprocess the content for shortcodes that need to enqueue their own assets.
				// PUM_Helpers::do_shortcode( $popup->post_content );

				ob_start();

				// Allow per popup JS additions.
				do_action( 'pum_generate_popup_js', $popup->ID );

				$popup_js = ob_get_clean();

				if ( ! empty( $popup_js ) ) {
					$js[ 'popup-' . $popup->ID ] = array(
						'content' => $popup_js,
					);
				}
			}

			// Clear the global $current.
			pum()->current_popup = null;

		}

		$js = apply_filters( 'pum_generated_js', $js );

		foreach ( $js as $key => $code ) {
			$js[ $key ] = wp_parse_args( $code, array(
				'content'  => '',
				'priority' => 10,
			) );
		}

		uasort( $js, array( 'PUM_Helpers', 'sort_by_priority' ) );

		$js_code = '';
		foreach ( $js as $key => $code ) {
			if ( ! empty( $code['content'] ) ) {
				$js_code .= $code['content'] . "\n\n";
			}
		}

		return $js_code;
	}