Get UUID v4

gistfile1.txt

// reference: https://stackoverflow.com/questions/105034/create-guid-uuid-in-javascript/2117523#2117523

function uuidv4(): string {
  const uuidTpl = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'

  return uuidTpl.replace(/[xy]/g, c =>
    String(
      c == 'x' ? (Math.random() * 16) | 0 : ((Math.random() * 16) & 0x3) | 0x8
    )
  )
}