How do I get a timestamp in JavaScript?

tl;dr

To get a timestamp in JavaScript, you can use the simple Date.now() method. This method returns the number of milliseconds since the Unix epoch. You can also use the unary operator + to call Date.prototype.valueOf:

+ new Date()

Or, you can call valueOf directly:

new Date().valueOf()

To get the number of seconds since the Unix epoch (i.e., Unix timestamp), you can use Math.floor(Date.now() / 1000). Alternatively, you can use bitwise-or to floor, which is slightly faster but less readable.

Date.now() / 1000 | 0