![]() JavaScript itself does not have a way to measure time in microseconds (1 millionth of a second), but most environments provide it. Sometimes we need more precise time measurements. Note that unlike many other systems, timestamps in JavaScript are in milliseconds, not in seconds. Use Date.now() to get the current timestamp fast.That’s because a Date becomes the timestamp when converted to a number. Dates can be subtracted, giving their difference in milliseconds. ![]() Good for adding/subtracting days/months/hours.
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