How do you get a timestamp in JavaScript?

Question

How can I get a timestamp in JavaScript?

Something similar to Unix timestamp, that is, a single number that represents the current time and date. Either as a number

Answer 1

I learned a really cool way of converting a given Date object to a Unix timestamp from the source code of JQuery Cookie the other day.

Here's an example:

var date = new Date();
var timestamp = +date;