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# Bytes utility
[![NPM Version][npm-image]][npm-url]
[![NPM Downloads][downloads-image]][downloads-url]
[![Build Status][travis-image]][travis-url]
Utility to parse a string bytes (ex: `1TB`) to bytes (`1099511627776`) and vice-versa.
## Usage
```js
var bytes = require('bytes');
```
#### bytes.format(number value, [options]): string|null
Format the given value in bytes into a string. If the value is negative, it is kept as such. If it is a float, it is
rounded.
**Arguments**
| Name | Type | Description |
|---------|--------|--------------------|
| value | `number` | Value in bytes |
| options | `Object` | Conversion options |
**Options**
| Property | Type | Description |
|-------------------|--------|-----------------------------------------------------------------------------------------|
| decimalPlaces | `number`|`null` | Maximum number of decimal places to include in output. Default value to `2`. |
| fixedDecimals | `boolean`|`null` | Whether to always display the maximum number of decimal places. Default value to `false` |
| thousandsSeparator | `string`|`null` | Example of values: `' '`, `','` and `.`... Default value to `' '`. |
**Returns**
| Name | Type | Description |
|---------|-------------|-------------------------|
| results | `string`|`null` | Return null upon error. String value otherwise. |
**Example**
```js
bytes(1024);
// output: '1kB'
bytes(1000);
// output: '1000B'
bytes(1000, {thousandsSeparator: ' '});
// output: '1 000B'
bytes(1024 * 1.7, {decimalPlaces: 0});
// output: '2kB'
```
#### bytes.parse(string value): number|null
Parse the string value into an integer in bytes. If no unit is given, it is assumed the value is in bytes.
**Arguments**
| Name | Type | Description |
|---------------|--------|--------------------|
| value | `string` | String to parse. |
**Returns**
| Name | Type | Description |
|---------|-------------|-------------------------|
| results | `number`|`null` | Return null upon error. Value in bytes otherwise. |
**Example**
```js
bytes('1kB');
// output: 1024
bytes('1024');
// output: 1024
```
## Installation
```bash
npm install bytes --save
component install visionmedia/bytes.js
```
## License
[](https://github.com/visionmedia/bytes.js/blob/master/LICENSE)
[downloads-image]: https://img.shields.io/npm/dm/bytes.svg
[downloads-url]: https://npmjs.org/package/bytes
[npm-image]: https://img.shields.io/npm/v/bytes.svg
[npm-url]: https://npmjs.org/package/bytes
[travis-image]: https://img.shields.io/travis/visionmedia/bytes.js/master.svg
[travis-url]: https://travis-ci.org/visionmedia/bytes.js