[PHPLondon-discuss] JQuery .attr

[Harry Roberts]

You should be able to do something like the following which will distinguish between an undefined (null) value and an empty string.

But yeah, this is tedious :\

// --------------------------------------

var some_val = $('#element').val();
if( typeof(some_val) == "undefined" )
{
  // Value is undefined
} else
{
  // Value is defined, but may be an empty string.
}

// --------------------------------------

> -----Original Message-----
> From: phplondon-discuss-bounces at lists.phplondon.org 
> [mailto:phplondon-discuss-bounces at lists.phplondon.org] On 
> Behalf Of Marcus Bointon
> Sent: 23 September 2007 00:21
> To: info at intoex.com; PHP London discussion list
> Subject: Re: [PHPLondon-discuss] JQuery .attr
> 
> On 22 Sep 2007, at 11:38, Alex V. wrote:
> 
> > let i have <input id=element name=name type=text value="" 
> /> if I do 
> > $('#element').attr('value') - it returns "undefined"
> 
>  From the jquery docs I can see that the recommended way of 
> doing this is $('#element').val(). I don't know if that will 
> give you anything different, but it does seem odd that it 
> doesn't distinguish between undefined and an empty string.
> 
> You're missing quotes around your attribute values, but you 
> probably knew that.
> 
> Marcus
> --
> Marcus Bointon
> Synchromedia Limited: Creators of 
> http://www.smartmessages.net/ UK resellers of info at hand CRM 
> solutions marcus at synchromedia.co.uk | http://www.synchromedia.co.uk/
> 
> 
> 
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