.attr() does not return "undefined" in IE6/7 for an undefined attribute

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:

Here is the Bug:

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".

Attachments (0)

Change History (4)

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.

This is not a bug, please see post by dmethvin

keywords:	docfix → needsdocs

keywords:	needsdocs

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