src/features/FileFeature.js

import { Feature } from "./Feature.js";
 
/**
 * The File API feature.
 */
 
export class FileFeature extends Feature {
 
	/**
	 * Constructs a new File feature.
	 */
 
	constructor() {
 
		super("File");
 
		/**
		 * Indicates whether the File API is supported.
		 *
		 * @type {Boolean}
		 */
 
		this.supported = (
			this.root.File !== undefined &&
			this.root.FileReader !== undefined &&
			this.root.FileList !== undefined &&
			this.root.Blob !== undefined
		);
 
	}
 
}