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Showing content from https://github.com/visionmedia/bytes.js below:

visionmedia/bytes.js: node byte string parser

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

This is a Node.js module available through the npm registry. Installation is done using the npm install command:

var bytes = require('bytes');

bytes(number｜string value, [options]): number｜string｜null

Default export function. Delegates to either bytes.format or bytes.parse based on the type of value.

Arguments

Name Type Description value number｜string Number value to format or string value to parse options Object Conversion options for format

Returns

Name Type Description results string｜number｜null Return null upon error. Numeric value in bytes, or string value otherwise.

Example

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

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

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 ''. unit string｜null The unit in which the result will be returned (B/KB/MB/GB/TB). Default value to '' (which means auto detect). unitSeparator string｜null Separator to use between number and unit. Default value to ''.

Returns

Name Type Description results string｜null Return null upon error. String value otherwise.

Example

bytes.format(1024);
// output: '1KB'

bytes.format(1000);
// output: '1000B'

bytes.format(1000, {thousandsSeparator: ' '});
// output: '1 000B'

bytes.format(1024 * 1.7, {decimalPlaces: 0});
// output: '2KB'

bytes.format(1024, {unitSeparator: ' '});
// output: '1 KB'

bytes.parse(string｜number value): number｜null

Parse the string value into an integer in bytes. If no unit is given, or value is a number, 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
pb for petabytes

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

Arguments

Name Type Description value string｜number String to parse, or number in bytes.

Returns

Name Type Description results number｜null Return null upon error. Value in bytes otherwise.

Example

bytes.parse('1KB');
// output: 1024

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

bytes.parse(1024);
// output: 1024

MIT

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