2014-07-24 8:34, Boris Zbarsky wrote:

On 7/24/14, 1:29 AM, Jukka K. Korpela wrote:
However, browsers actually impose an upper limit of 32767
In Chrome and Firefox, values larger than this are interpreted as 0.

In the case of Firefox, this was a bug, that was fixed a few months ago.
  See https://bugzilla.mozilla.org/show_bug.cgi?id=996095

I’m afraid the fix does not work. Testing the jsfiddle code there,
in the newest Firefox (31.0, on Win 7), the “Click here” link, with tabindex="40000", and the input element after it, with tabindex="200007", are not in the tabbing order at all, and the tabIndex property value is 32767. This is odd because tabindex="32767" as such works OK.

My observation on larger values being taken as 0 was based on my initial testing with very large values (outside Int32 range).

In Chrome, the elements are in the tabbing order, but if their tabindex attributes are swapped, the order stays the same, i.e. follows the textual order. This is natural since tabIndex property value is 32767 for both.

1) Keep tabindex unlimited and try to make browsers implement this.

This is what we should do, in my totally biased opinion.

Even in the best case, it would take several years before the usage share of all current browser versions is small enough.

Are there any use cases for tabindex values greater than 32767? Presumably not real use now (since such values do not work), but are there reasonably imaginable use cases?


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