javascript generate unique id

                                    Math.floor(Math.random() * 100)
//the bigger the number the bigger the output

                                    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());

                                    function randomId(): string {
  const uint32 = window.crypto.getRandomValues(new Uint32Array(1))[0];
  return uint32.toString(16);
}

                                    let ID = (length = 6) => {
	// new Date() will return current time
  	// getTime() method returns the number of milliseconds* since the Unix Epoch.
	// -length to get last items on string
	return new Date().getTime().toString().slice(-length);
}

                                    function uuid() {<br/>  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {<br/>    var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r &amp; 0x3 | 0x8);<br/>    return v.toString(16);<br/>  });<br/>}<br/><br/>var userID=uuid();//something like: &quot;ec0c22fa-f909-48da-92cb-db17ecdb91c5&quot;