[PHPLondon-discuss] JQuery .attr

[Alex V.]

Harry,

I've done it easier -

some_val = $('#element').attr('value') || ''

-- 
Alex

Monday, September 24, 2007, 11:45:58 AM, you wrote:

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

HR> But yeah, this is tedious :\

HR> // --------------------------------------

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

HR> // --------------------------------------

>> -----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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