Demonstration Of Date Object Formatting Using Date Prototyping

If anyone is interested, I put together this little demo for a dude who posted a comment on my site. It demonstrates how to apply a date and time mask to a Javascript Date object using regular expressions. It creates two methods that are prototyped to the Javascript Date object and therefore are available to all dates:

• Date.prototype.dateFormat()
• Date.prototype.timeFormat()

Regular Expression Date Mask Demo

http://www.bennadel.com/resources/demo/2/

Short link: https://bennadel.com/251

Reader Comments

Anna Jan 2, 2008 at 11:49 PM

6 Comments

Thanks a ton for this. Really needed it for making my own masks on Unix timestamps.

James Jan 3, 2008 at 12:08 AM

1 Comments

Hey, by the way there is what I would consider to be a "bug" in this. getMonth() is a zero based function, so months like January come back as 0 and December comes back as 11. It can be fixed like this:

"m": this.getMonth()+1,
"mm": ((this.getMonth()+1).toString().length == 1) ? ("0" + this.getMonth()+1) : this.getMonth()+1,

Ben Nadel Jan 3, 2008 at 7:15 AM

15,902 Comments

@James,

Thanks for the update. It seems to be handled differently in every language, so I am hesitant to call anything a bug. However, a zero-based month system never feels natural. You just want to say FIRST month (as in 1st as in 1) of the year.

Oh my chickens, this post is old!

Hit me up on Twitter if you want to discuss it further.