How to Clone a Date Object in JavaScript?

Cloning a Date Object

In JavaScript, assigning a Date object to another one merely copies the reference to the same instance. Consequently, any alterations made to one will be reflected in the other. This raises the question: how can we create a true clone or copy of a Date object?

This can be achieved using the Date object's getTime() method. This method retrieves the number of milliseconds elapsed since the epoch (1 January 1970 00:00:00 UTC).

To clone a Date object:

var date = new Date();
var copiedDate = new Date(date.getTime());

This method generates a new Date object initialized with the exact same time value as the original date.

Alternatively, in Safari 4, one can write:

var date = new Date();
var copiedDate = new Date(date);

However, the compatibility of this approach across different browsers remains uncertain.

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