Simple usage

const uid = new UID().value

generates a 8 char uid from the charset 23456789abdegjkmnpqrvwxyz

Alpha only

import UID, { alpha } from './uid.js'

const uid = new UID({ charset: alpha, length: 6 }).value

generates a 6 char uid from the charset 'bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ'

Custom charset

const uid = new UID({ charset: '!@#$%^&*()_+', length: 4 }).value

Ensure unique

const uid = new UID().exclude([Array of uids to exclude]).value 

Notes

1. The included charsets safe and alpha, exclude vowels to prevent expletives
2. No restrictions are placed on the length or charsets you provide. You could for example pass { charset: 'x', length:1 } which will of course only ever generate a uid of 'x'.
3. If you provide an exclude array the code will keep looping until it finds a uid that is not in the array. If the array is too large and/or the charset and length provided are not sufficient it may take some time or enter an infinite loop.