Date.now() returns the number of milliseconds that have elapsed since midnight January 1, 1970 UTC.
When this page loaded, Date.now() was called and returned:
That number of milliseconds is:
Click the button below to call Date.now() again:
When the button was clicked, Date.now() was called and returned:
That number of milliseconds is:
The difference between the two calls to Date.now() is: