woocommerce-paypal-payments/modules/ppcp-wc-gateway/src/Assets/class-settingspageassets.php

<?php

/**
 * Register and configure assets provided by this module.
 */

declare(strict_types=1);

namespace WooCommerce\PayPalCommerce\WcGateway\Assets;

class SettingsPageAssets
{
	/**
	 * @var string
	 */
	private $module_url;

	/**
	 * Assets constructor.
	 * @param string $module_url The url of this module.
	 */
	public function __construct(string $module_url)
	{
		$this->module_url = $module_url;
	}

	/**
	 * Register assets provided by this module.
	 */
    public function register_assets(): void
	{
		if(is_admin() && ! is_ajax()){
			$this->register_admin_assets();
		}
	}

	/**
	 * Register assets for admin pages.
	 */
	private function register_admin_assets(): void
	{
		add_action('admin_enqueue_scripts', function(){
			wp_enqueue_script(
				'ppcp-gateway-settings',
				trailingslashit($this->module_url) . 'assets/js/gateway-settings.js',
				[],
				null,
				true
			);
		});
	}
}