JavaScript将日期转换为格式

Question

I'm trying to truncate a JavaScript Date object string from:

Wed Aug 01 2012 06:00:00 GMT-0700 (Pacific Daylight Time)

to

Wed Aug 01 2012

(I'm not particular, could be of format MM/DD/YYYY for example, as long as I get rid of the time/timezone)

Essentially I just want to get rid of the time and the timezone because I need to do a === comparison with another date (that doesn't include the time or timezone)

I've tried using this http://www.mattkruse.com/javascript/date/index.html but it was to no avail. Does anyone know how I can format the existing string such as to get rid of the time? I would prefer to stay away from substring functions, but if that's the only option then I guess I'll have to settle.

Edit: I'm open to options that will compare two date objects/strings and return true if the date is the same and the time is different.

Answer 1

The only way to get a specific format of date across different browsers is to create it yourself. The Date methods in ECMAScript are all implementation dependent.

If you have a date object, then:

// For format Wed Aug 01 2012
function formatDate(obj) {
  var days = ['Sun','Mon','Tue','Wed','Thu','Fri','Sat'];
  var months = ['Jan','Feb','Mar','Apr','May','Jun',
               'Jul','Aug','Sep','Oct','Nov','Dec'];    
  return days[obj.getDay()] + ' ' + months[obj.getMonth()] + 
         ' ' + obj.getDate() + ' ' + obj.getFullYear();
}

Though a more widely used format is Wed 01 Aug 2012

Answer 2

Use the Date object's toDateString() method instead of its toString() method.

SIDE BY SIDE DEMO

Even so, it might be better to compare the two date objects directly: Compare two dates with JavaScript