unique-number

unique-number

Generate a unique number.

var uniqueNumber = require("unique-number");

// Timestamp
console.log( uniqueNumber() );

// Iterated timestamps
for (var i=0; i<1000; i++) {
	console.log( uniqueNumber() );
}

// Resets timestamp+1000 back to timestamp
uniqueNumber.reset();

setTimeout( function() {
	console.log( uniqueNumber() );
}, 100);

When multiple requests are made per millisecond, the timestamp is simply iterated. After a few billion runs—typically when your operations are complete—you should run uniqueNumber.reset() to avoid passing Number.MAX_SAFE_INTEGER.

Because this library is so small and simple, it requires this one extra step. If you disapprove, you may prefer cuid, puid or shortid.