source: trip-planner-front/node_modules/bytes/Readme.md@ 1ad8e64

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1# Bytes utility
2
3[![NPM Version][npm-image]][npm-url]
4[![NPM Downloads][downloads-image]][downloads-url]
5[![Build Status][travis-image]][travis-url]
6[![Test Coverage][coveralls-image]][coveralls-url]
7
8Utility to parse a string bytes (ex: `1TB`) to bytes (`1099511627776`) and vice-versa.
9
10## Installation
11
12This is a [Node.js](https://nodejs.org/en/) module available through the
13[npm registry](https://www.npmjs.com/). Installation is done using the
14[`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):
15
16```bash
17$ npm install bytes
18```
19
20## Usage
21
22```js
23var bytes = require('bytes');
24```
25
26#### bytes.format(number value, [options]): string|null
27
28Format 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
29 rounded.
30
31**Arguments**
32
33| Name | Type | Description |
34|---------|----------|--------------------|
35| value | `number` | Value in bytes |
36| options | `Object` | Conversion options |
37
38**Options**
39
40| Property | Type | Description |
41|-------------------|--------|-----------------------------------------------------------------------------------------|
42| decimalPlaces | `number`|`null` | Maximum number of decimal places to include in output. Default value to `2`. |
43| fixedDecimals | `boolean`|`null` | Whether to always display the maximum number of decimal places. Default value to `false` |
44| thousandsSeparator | `string`|`null` | Example of values: `' '`, `','` and `.`... Default value to `''`. |
45| unit | `string`|`null` | The unit in which the result will be returned (B/KB/MB/GB/TB). Default value to `''` (which means auto detect). |
46| unitSeparator | `string`|`null` | Separator to use between number and unit. Default value to `''`. |
47
48**Returns**
49
50| Name | Type | Description |
51|---------|------------------|-------------------------------------------------|
52| results | `string`|`null` | Return null upon error. String value otherwise. |
53
54**Example**
55
56```js
57bytes(1024);
58// output: '1KB'
59
60bytes(1000);
61// output: '1000B'
62
63bytes(1000, {thousandsSeparator: ' '});
64// output: '1 000B'
65
66bytes(1024 * 1.7, {decimalPlaces: 0});
67// output: '2KB'
68
69bytes(1024, {unitSeparator: ' '});
70// output: '1 KB'
71
72```
73
74#### bytes.parse(string|number value): number|null
75
76Parse the string value into an integer in bytes. If no unit is given, or `value`
77is a number, it is assumed the value is in bytes.
78
79Supported units and abbreviations are as follows and are case-insensitive:
80
81 * `b` for bytes
82 * `kb` for kilobytes
83 * `mb` for megabytes
84 * `gb` for gigabytes
85 * `tb` for terabytes
86
87The units are in powers of two, not ten. This means 1kb = 1024b according to this parser.
88
89**Arguments**
90
91| Name | Type | Description |
92|---------------|--------|--------------------|
93| value | `string`|`number` | String to parse, or number in bytes. |
94
95**Returns**
96
97| Name | Type | Description |
98|---------|-------------|-------------------------|
99| results | `number`|`null` | Return null upon error. Value in bytes otherwise. |
100
101**Example**
102
103```js
104bytes('1KB');
105// output: 1024
106
107bytes('1024');
108// output: 1024
109
110bytes(1024);
111// output: 1024
112```
113
114## License
115
116[MIT](LICENSE)
117
118[downloads-image]: https://img.shields.io/npm/dm/bytes.svg
119[downloads-url]: https://npmjs.org/package/bytes
120[npm-image]: https://img.shields.io/npm/v/bytes.svg
121[npm-url]: https://npmjs.org/package/bytes
122[travis-image]: https://img.shields.io/travis/visionmedia/bytes.js/master.svg
123[travis-url]: https://travis-ci.org/visionmedia/bytes.js
124[coveralls-image]: https://img.shields.io/coveralls/visionmedia/bytes.js/master.svg
125[coveralls-url]: https://coveralls.io/r/visionmedia/bytes.js?branch=master
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