[WordPress] WordPress Plugin Interfaces: Working With Assets

00-interface-asset.php

<?php

namespace Acme\Admin\Interfaces;

interface Asset {

	public function init();
	public function enqueue();
}

01-javascript-asset.php

<?php

namespace Acme\Admin;
use Acme\Admin\Interfaces;

class JavaScript_Assets implements Interfaces\Asset {

	private $assets_dir;
  
	private $js_dir;

	public function __construct() {

		$this->assets_dir = trailingslashit(
			plugin_dir_url( __FILE__ ) . 'assets'
		);

		$this->js_dir = trailingslashit( $this->assets_dir . 'js' );
	}

	public function init() {

		add_action(
			'admin_enqueue_scripts',
			array( $this, 'enqueue' )
		);
	}

	public function enqueue() {

		wp_enqueue_script(
			'toggle-admin-notices',
			$this->js_dir . 'admin.js',
			array( 'jquery' ),
			false
		);
	}
}

02-class-instantiation.php

<?php

$assets = new Admin\JavaScript_Assets();
$assets->init();