How to add 30 minutes to a JavaScript Date object?

Question

I\'d like to get a Date object which is 30 minutes later than another Date object. How do I do it with JavaScript?

Answer 1

var d1 = new Date (),
    d2 = new Date ( d1 );
d2.setMinutes ( d1.getMinutes() + 30 );
alert ( d2 );