47 lines
983 B
JavaScript
47 lines
983 B
JavaScript
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/*!
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pretty-bytes
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Convert bytes to a human readable string: 1337 → 1.34 kB
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https://github.com/sindresorhus/pretty-bytes
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by Sindre Sorhus
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MIT License
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*/
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(function () {
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'use strict';
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// Number.isNaN() polyfill
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var isNaN = function (val) {
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return val !== val;
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};
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var prettyBytes = function (num) {
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if (typeof num !== 'number' || isNaN(num)) {
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throw new TypeError('Expected a number');
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}
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var exponent;
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var unit;
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var neg = num < 0;
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var units = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
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if (neg) {
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num = -num;
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}
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if (num < 1) {
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return (neg ? '-' : '') + num + ' B';
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}
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exponent = Math.min(Math.floor(Math.log(num) / Math.log(1000)), units.length - 1);
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num = (num / Math.pow(1000, exponent)).toFixed(2) * 1;
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unit = units[exponent];
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return (neg ? '-' : '') + num + ' ' + unit;
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};
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if (typeof module !== 'undefined' && module.exports) {
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module.exports = prettyBytes;
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} else {
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self.prettyBytes = prettyBytes;
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}
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})();
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