How do you get a timestamp in JavaScript?
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The following example demonstrates how to get a timestamp and how to convert it back to the human-readable date and time format.
How do you get a timestamp in JavaScript?
Timestamp in milliseconds
To get the number of milliseconds since Unix epoch, call
Date.now
:Alternatively, use the unary operator
+
to callDate.prototype.valueOf
:Alternatively, call
valueOf
directly:To support IE8 and earlier (see compatibility table), create a shim for
Date.now
:Alternatively, call
getTime
directly:Timestamp in seconds
To get the number of seconds since Unix epoch, i.e. Unix timestamp:
Alternatively, using bitwise-or to floor is slightly faster, but also less readable and may break in the future (see explanations 1, 2):