Create a unique number with javascript time

Question

I need to generate unique id numbers on the fly using javascript. In the past, I\'ve done this by creating a number using time. The number would be made up of the four digi

Answer 1

in reference to #Marcelo Lazaroni solution above

Date.now() + Math.random()

returns a number such as this 1567507511939.4558 (limited to 4 decimals), and will give non-unique numbers (or collisions) every 0.1%.

adding toString() fixes this

Date.now() + Math.random().toString()

returns '15675096840820.04510962122198503' (a string), and is further so 'slow' that you never get the 'same' millisecond, anyway.