How Can I Calculate the Difference Between Two Dates in JavaScript?

Calculating Date Differences in JavaScript

To ascertain the disparity between two dates in various time denominations, such as days, hours, minutes, seconds, milliseconds, and nanoseconds, you can leverage JavaScript's Date object.

Approach:

1. Subtract the Dates: Begin by subtracting the two Date objects. This operation yields the difference in milliseconds.

   var difference = date2 - date1;

2. Convert to Other Denominations:

   • Days: Divide the difference by 86,400,000 (milliseconds in a day).
   • Hours: Divide the difference by 3,600,000 (milliseconds in an hour).
   • Minutes: Divide the difference by 60,000 (milliseconds in a minute).
   • Seconds: Divide the difference by 1,000 (milliseconds in a second).
   • Milliseconds: The difference is already in milliseconds.
   • Nanoseconds: Multiply the difference by 1,000,000 (nanoseconds in a millisecond).

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