Install
npm install base-p
Usage
const Base = require('base-p')
base62 = new Base(62)
base62.encode(2017) // returns 'WX'
base62.decode('WX') // returns 2017
base5 = new Base('01234')
base5.encode(7) // returns '12'
base5.decode('12') // returns 7
Usage with BigInt
const Base = require('base-p')
base62 = new Base(62)
base62.encodeBig(2017n) // returns 'WX'
base62.decodeBig('WX') // returns 2017n
base5 = new Base('01234')
base5.encodeBig(7n) // returns '12'
base5.decodeBig('12') // returns 7n
Base
The parameter for the constructor is a either a string containing the alphabet used for the conversion, or an integer representing the base for one of the predefined alphabets:
| Base | Alphabet |
|---|---|
| 2 | 01 |
| 8 | 01234567 |
| 11 | 0123456789a |
| 16 | 0123456789abcdef |
| 32 | 0123456789ABCDEFGHJKMNPQRSTVWXYZ |
| 36 | 0123456789abcdefghijklmnopqrstuvwxyz |
| 58 | 123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz |
| 62 | 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ |
| 64 | ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/ |
| 67 | ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.!~ |