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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:
$ npm install bytes
var bytes = require('bytes');
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
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'
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 byteskb
for kilobytesmb
for megabytesgb
for gigabytestb
for terabytespb
for petabytesThe 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