javascript uniqueid code example

Example 1: javascript generate unique id

function uuidv4() {
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
    var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
    return v.toString(16);
  });
}

console.log(uuidv4());

Example 2: js library for unique id uniqid

uniqid() -> "4n5pxq24kpiob12og9"
uniqid('hello-') -> "hello-4n5pxq24kpiob12og9"
uniqid('hello-', '-goodbye') -> "hello-4n5pxq24kpiob12og9-goodbye"

// usage with suffix only
uniqid('', '-goodbye') -> "4n5pxq24kpiob12og9-goodbye"
uniqid(undefined, '-goodbye') -> "4n5pxq24kpiob12og9-goodbye"