The 'bytes' npm package is a utility for parsing and formatting byte sizes. It allows users to easily convert between different units of bytes and parse strings with byte size information into numbers. It is useful for displaying file sizes in a human-readable format or for parsing user input into byte quantities.

What are bytes's main functionalities?

Parse byte size strings

This feature allows you to parse a string representing a byte size into an integer number of bytes. For example, passing '1000KB' will return 1000000.

"1000KB" // returns 1000000

Format bytes into strings

This feature allows you to format an integer number of bytes into a string with a unit. For example, passing 1024 will return '1KB'.

1024 // returns '1KB'

Specify the number of decimal places

This feature allows you to specify the number of decimal places when formatting bytes into a string. For example, passing an object with 1000 bytes and 1 decimal place will return '1.0KB'.

{ bytes: 1000, decimalPlaces: 1 } // returns '1.0KB'

Specify the unit of bytes

This feature allows you to specify the unit when formatting bytes. For example, passing an object with 1024 bytes and 'kB' as the unit will return '1kB'.

{ bytes: 1024, unit: 'kB' } // returns '1kB'

Other packages similar to bytes

Readme

Source

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.

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

Keywords

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Last updated on 14 Nov 2015

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