date.setHours() not working

Question

I am trying to subtract hours from a given date time string using javascript. My code is like:

     var cbTime = new Date();    
     cbTime = selectedTime.s         


        

Answer 1

The reason is that setHours(), setMinutes(), etc, take an Integer as a parameter. From the docs:

...

The setMinutes() method sets the minutes for a specified date according to local time.

...

Parameters:

An integer between 0 and 59, representing the minutes.

So, you could do this:

var selectedTime = new Date(),
    cbTime = new Date(); 
   
cbTime.setHours(selectedTime.getHours() - 5);
cbTime.setMinutes(selectedTime.getMinutes() - 30);

document.write('cbTime: ' + cbTime);
document.write('
');
document.write('selectedTime: ' + selectedTime);