Nodejs generate short unique alphanumeric

Question

I would like to generate a short unique alphanumeric value to be used as confirmation codes for online purchases. I\'ve looking into https://github.com/broofa/node-uuid but the

Answer 1

based on this https://www.npmjs.com/package/randomstring

var randomstring = require("randomstring");

randomstring.generate();
// >> "XwPp9xazJ0ku5CZnlmgAx2Dld8SHkAeT"

randomstring.generate(7);
// >> "xqm5wXX"

randomstring.generate({
  length: 12,
  charset: 'alphabetic'
});
// >> "AqoTIzKurxJi"

randomstring.generate({
  charset: 'abc'
});
// >> "accbaabbbbcccbccccaacacbbcbbcbbc"

you can do this

randomstring.generate({
  length: 8,
  charset: 'alphabetic'
});