constructor( manager ) {

		super( manager );

		/**
		 * This flag can be used for type testing.
		 *
		 * @type {boolean}
		 * @readonly
		 * @default true
		 */
		this.isImageBitmapLoader = true;

		if ( typeof createImageBitmap === 'undefined' ) {

			console.warn( 'THREE.ImageBitmapLoader: createImageBitmap() not supported.' );

		}

		if ( typeof fetch === 'undefined' ) {

			console.warn( 'THREE.ImageBitmapLoader: fetch() not supported.' );

		}

		/**
		 * Represents the loader options.
		 *
		 * @type {Object}
		 * @default {premultiplyAlpha:'none'}
		 */
		this.options = { premultiplyAlpha: 'none' };

	}
Constructs a new image bitmap loader.

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