Neither IE nor Edge can count specific user-defined HTML5 elements properly

Fixed Issue #5249985


Oct 30, 2015
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Steps to reproduce


Repro Steps:

Expected Results:

The style defined with nth-of-type directives are applied to the incorrect elements, depending on how many other elements are

Actual Results:

Dev Channel specific:



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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “Christian F.”

      Changed Assigned To from “Christian F.” to “IE S.”

      Changed Status to “Not reproducible”

      Changed Assigned To from “IE S.” to “Unnati A.”

      Changed Status from “Not reproducible”

      Changed Assigned To to “Bogdan B.”

    • Looks like the description got truncated in the conversion to the new tracking system.

      This problem still exists. It seems like IE & Edge both count any user-defined tags as if it were all the same type, even though different tags are used, leading to incorrect results compared to tags specifically defined by the standard. Other browsers appropriately count individual user-defined tags independently, leading to correct results compared to tags defined by the standard.

      It should be noted that user-defined tags are defined as legal by the standard, but with limited semantics. However, applying CSS to them should work the same as for tags fully defined by the standard.

    • Microsoft Edge Team

      Changed Assigned To from “Bogdan B.” to “James M.”

      Changed Assigned To from “James M.” to “Bogdan B.”

      Changed Assigned To from “Bogdan B.” to “Greg W.”

      Changed Assigned To from “Greg W.” to “IE S.”

      Changed Status to “Fixed”

    • Thanks for your feedback. Duping to a pre-existing issue.

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