115 lines
3.2 KiB
Markdown
115 lines
3.2 KiB
Markdown
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# Bytes utility
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[![NPM Version][npm-image]][npm-url]
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[![NPM Downloads][downloads-image]][downloads-url]
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[![Build Status][travis-image]][travis-url]
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Utility to parse a string bytes (ex: `1TB`) to bytes (`1099511627776`) and vice-versa.
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## Usage
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```js
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var bytes = require('bytes');
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```
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#### bytes.format(number value, [options]): string|null
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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
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rounded.
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**Arguments**
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| Name | Type | Description |
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|---------|--------|--------------------|
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| value | `number` | Value in bytes |
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| options | `Object` | Conversion options |
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**Options**
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| Property | Type | Description |
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|-------------------|--------|-----------------------------------------------------------------------------------------|
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| decimalPlaces | `number`|`null` | Maximum number of decimal places to include in output. Default value to `2`. |
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| fixedDecimals | `boolean`|`null` | Whether to always display the maximum number of decimal places. Default value to `false` |
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| thousandsSeparator | `string`|`null` | Example of values: `' '`, `','` and `.`... Default value to `' '`. |
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| unitSeparator | `string`|`null` | Separator to use between number and unit. Default value to `''`. |
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**Returns**
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| Name | Type | Description |
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|---------|-------------|-------------------------|
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| results | `string`|`null` | Return null upon error. String value otherwise. |
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**Example**
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```js
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bytes(1024);
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// output: '1kB'
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bytes(1000);
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// output: '1000B'
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bytes(1000, {thousandsSeparator: ' '});
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// output: '1 000B'
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bytes(1024 * 1.7, {decimalPlaces: 0});
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// output: '2kB'
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bytes(1024, {unitSeparator: ' '});
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// output: '1 kB'
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```
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#### bytes.parse(string value): number|null
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Parse the string value into an integer in bytes. If no unit is given, it is assumed the value is in bytes.
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Supported units and abbreviations are as follows and are case-insensitive:
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* "b" for bytes
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* "kb" for kilobytes
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* "mb" for megabytes
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* "gb" for gigabytes
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* "tb" for terabytes
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The units are in powers of two, not ten. This means 1kb = 1024b according to this parser.
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**Arguments**
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| Name | Type | Description |
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|---------------|--------|--------------------|
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| value | `string` | String to parse. |
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**Returns**
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| Name | Type | Description |
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|---------|-------------|-------------------------|
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| results | `number`|`null` | Return null upon error. Value in bytes otherwise. |
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**Example**
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```js
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bytes('1kB');
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// output: 1024
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bytes('1024');
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// output: 1024
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```
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## Installation
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```bash
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npm install bytes --save
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component install visionmedia/bytes.js
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```
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## License
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[](https://github.com/visionmedia/bytes.js/blob/master/LICENSE)
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[downloads-image]: https://img.shields.io/npm/dm/bytes.svg
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[downloads-url]: https://npmjs.org/package/bytes
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[npm-image]: https://img.shields.io/npm/v/bytes.svg
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[npm-url]: https://npmjs.org/package/bytes
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[travis-image]: https://img.shields.io/travis/visionmedia/bytes.js/master.svg
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[travis-url]: https://travis-ci.org/visionmedia/bytes.js
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