ng-filters/src/bytes/bytes-filter.js

Useful filters for AngularJS

(function () {
    'use strict';

    angular.module('angular-filters')
        .filter('bytes', [function () {
            return function(bytes, precision) {
                if (typeof bytes !== 'number') {
                    bytes = parseFloat(bytes);
                }

                if (bytes === 0) {
                    return '0 B';
                } else if (isNaN(bytes) || !isFinite(bytes)) {
                    return '-';
                }

                var isNegative = bytes < 0;
                if (isNegative) {
                    bytes = -bytes;
                }

                if (typeof precision !== 'number') {
                    precision = parseFloat(precision);
                }

                if (isNaN(precision) || !isFinite(precision)) {
                    precision = 1;
                }

                var units = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
                var exponent = Math.min(Math.floor(Math.log(bytes) / Math.log(1024)), units.length - 1);
                var number = (bytes / Math.pow(1024, Math.floor(exponent))).toFixed(precision);

                return (isNegative ? '-' : '') +  number +  ' ' + units[exponent];
            };
        }]);
}());