what is the difference between new Date and +new Date? [duplicate]

Question

This question already has answers here:

What does the plus sign do in '+new Date' (7 answers)

Closed 9 years ago.

What is the difference between new Date and +new Date?

For example:

var date = new Date;
console.log(date);

var plusDate = +new Date;
console.log(plusDate);

Logs:

Sat May 10 2014 01:13:46 GMT+0300 (Jordan Standard Time)
1399673626539

Answer 1

The unary plus operator casts the Date object to a Number object (which is expressed in in milliseconds since 01 January, 1970 UTC).

Answer 2

The first one creates a Date object, the second one adds the current date value in milliseconds to the original value of plusDate, which was 0.