three.js/src/loaders/LoaderUtils.js

/**
 * @author Don McCurdy / https://www.donmccurdy.com
 */

var LoaderUtils = {

	decodeText: function ( array ) {

		if ( typeof TextDecoder !== 'undefined' ) {

			return new TextDecoder().decode( array );

		}

		// Avoid the String.fromCharCode.apply(null, array) shortcut, which
		// throws a "maximum call stack size exceeded" error for large arrays.

		var s = '';

		for ( var i = 0, il = array.length; i < il; i ++ ) {

			// Implicitly assumes little-endian.
			s += String.fromCharCode( array[ i ] );

		}

		// Merges multi-byte utf-8 characters.
		return decodeURIComponent( escape( s ) );

	},

	extractUrlBase: function ( url ) {

		var index = url.lastIndexOf( '/' );

		if ( index === - 1 ) return './';

		return url.substr( 0, index + 1 );

	}

};

export { LoaderUtils };