Make CSSOM APIs append rather than replace slots in the declaration block.

Not reproducible Issue #14565977


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Nov 7, 2017
This issue is public.
Found in
  • Microsoft Edge
  • Internet Explorer
  • Chrome
  • Safari
  • Firefox
  • Opera
Standard affected

Reported by 1 person

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Steps to reproduce

Otherwise logical properties work inconsistently with them.

See for more background and a CSSWG resolution.


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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “Steven K.”

      Changed Assigned To from “Steven K.” to “Zachariah L.”

    • Hi Emilio!

      Thank you for contacting us about this issue! Currently, Microsoft Edge does not support logical properties but they are under consideration for future releases. To view a list of planned features for the Edge browser, please visit:

      To make a feature request, please visit:


    • Microsoft Edge Team

      Changed Status to “Not reproducible”

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