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arxeiss

attr() return different values across the versions

in Using jQuery • 11 years ago

I have a problem with attr() function.

I made my own lightbox and with jQuery 1.4.x it works nice. But now I use 1.7 and there is a problem.

When I called attr in 1.4 $(element).attr("rel") when element hasn't rel, it returns empty string, but in 1.7 it returns undefined.

Why? I read a changelog and I didn't find any change at that function.

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kbwood.au

Re: attr() return different values across the versions

11 years ago

It changed in jQuery 1.6. From the attr documentation:

As of jQuery 1.6, the .attr() method returns undefined for attributes that have not been set. In addition, .attr() should not be used on plain objects, arrays, the window, or the document. To retrieve and change DOM properties, use the .prop() method.

arxeiss

Re: attr() return different values across the versions

11 years ago

Ou, I read it several times, but I have never seen this paragraph.

Sorry and Thank you

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