constructor( manager ) {

		/**
		 * The loading manager.
		 *
		 * @type {LoadingManager}
		 * @default DefaultLoadingManager
		 */
		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

		/**
		 * The crossOrigin string to implement CORS for loading the url from a
		 * different domain that allows CORS.
		 *
		 * @type {string}
		 * @default 'anonymous'
		 */
		this.crossOrigin = 'anonymous';

		/**
		 * Whether the XMLHttpRequest uses credentials.
		 *
		 * @type {boolean}
		 * @default false
		 */
		this.withCredentials = false;

		/**
		 * The base path from which the asset will be loaded.
		 *
		 * @type {string}
		 */
		this.path = '';

		/**
		 * The base path from which additional resources like textures will be loaded.
		 *
		 * @type {string}
		 */
		this.resourcePath = '';

		/**
		 * The [request header]{@link https://developer.mozilla.org/en-US/docs/Glossary/Request_header}
		 * used in HTTP request.
		 *
		 * @type {Object<string, any>}
		 */
		this.requestHeader = {};

	}
Constructs a new loader.

@param {LoadingManager} [manager] - The loading manager.