Re: [dom-tests] Update dom/lists/DOMTokenList-iteration.html so it no longer expects duplicates (#4658)

See https://github.com/whatwg/dom/issues/105 for the relevant DOM spec discussion, such as it is.  @foolip, you were in on that.  The spec said something, then changed, then none of the UAs followed for years, until Safari sort of did in their pre-releses, then the spec got switched back to match shipping browsers, then Safari shipped the changed behavior (which now no longer matched the changed-back spec), then the spec got changed again to that behavior.  None of the other engines have updated to that last spec change, and I'm not clear on whether they plan to, unfortunately.

Speaking for Geckom I'm still not entirely convinced on the new spec behavior, but probably willing to take a patch in Gecko if there's a patch with no performance impact, as I said in .  Such a thing has not materialized yet.  I myself have no plans to work on this in the near future; I have a lot of other much higher-priority things on my plate.

View on GitHub: https://github.com/w3c/web-platform-tests/pull/4658#issuecomment-276258077

Received on Tuesday, 31 January 2017 02:38:43 UTC