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Ticket #6737 (closed bug: wontfix)
.attr() does not return "undefined" in IE6/7 for an undefined attribute
| Reported by: | Beeper | Owned by: | |
|---|---|---|---|
| Priority: | low | Milestone: | 1.4.3 |
| Component: | attributes | Version: | 1.4.2 |
| Keywords: | Cc: | ||
| Blocking: | Blocked by: |
Description
On an input-element i want to check an attribute for existence. so i have something like: $('#id').attr('src') !== undefined
Here is the working example for Jquery 1.3.2: http://jsbin.com/oveci
Here is the Bug: http://jsbin.com/oveci/3
It seems to apply only for some HTML-Elements. I tried 'p' and .attr works fine, but for input-elements it returns "" and not "undefined".
Change History
comment:2 Changed 3 years ago by rwaldron
- Keywords docfix added
- Priority set to low
- Status changed from new to closed
- Resolution set to wontfix
This is not a bug, please see post by dmethvin
comment:4 Changed 2 years ago by addyosmani
- Keywords needsdocs removed
Docs updated: http://api.jquery.com/attr/
Please follow the bug reporting guidlines and use jsFiddle when providing test cases and demonstrations instead of pasting the code in the ticket.
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For attributes that mirror properties on specific DOM elements, such as the checked attribute on a checkbox or radio button, .attr() will return a non-undefined value.
The best cross-browser way to approach this is to check for a falsy value using if ( $('#id').attr('src') ) rather than checking for a particular value.