Check if img src is empty using jQuery attr
Solution 1
Placing the ! at the start negates the $('img...') not the whole expression. Try:
if ($('img.photoPreview', this).attr('src') != '') {
alert('empty src');
}
Solution 2
!
operator will be evaluated before the result (boolean) returned from ==
operator and will be applied to object returned by selector instead of boolean
returned by ==
operator.
Change
if(!$('img.photoPreview', this).attr('src') == '')
To
if($('img.photoPreview', this).attr('src') != '')
Solution 3
It's due to "src" being undefined. You should use this (it's more efficient than != ""):
if(!$('img.photoPreview', this).attr('src')) {
alert('empty src...');
}
You can see this working here: http://jsfiddle.net/GKHvQ/
Solution 4
@adil & @scoot
if($('img.photoPreview', this).attr('src') != '')
this condition says that if attribute src is not blank. But the condition would be to check if src attribute is ''.
better will be to use
if($('#photoPreview').attr('src') == '') {
alert('empty src...');
}
Adam
Updated on June 26, 2022Comments
-
Adam almost 2 years
I'm trying the following code:
if(!$('img.photoPreview', this).attr('src') == '') { alert('empty src...'); }
but it errors in the editor as not being completed correctly.
Can someone advise what is wrong?
Note: I'm trying to check - if not this image src is empty...
thx