liuyuehe92/bytes.js

node byte string parser

Bytes utility

Utility to parse a string bytes (ex: 1TB) to bytes (1099511627776) and vice-versa.

Usage

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

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.

Supported units and abbreviations are as follows and are case-insensitive:

• "b" for bytes
• "kb" for kilobytes
• "mb" for megabytes
• "gb" for gigabytes
• "tb" for terabytes

The units are in powers of two, not ten. This means 1kb = 1024b according to this parser.

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

bytes('1kB');
// output: 1024

bytes('1024');
// output: 1024

Installation

npm install bytes --save
component install visionmedia/bytes.js

License