Automatic promotion of 'attributes' and/or 'characterData' to true not implemented

Confirmed Issue #14762614 • Assigned to Travis L.


Travis L.
Nov 20, 2017
This issue is public.
Found in
  • Microsoft Edge
Standard affected
DOM Standard

Found in build #
Reported by 1 person

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Steps to reproduce

See demo at:
(Syntax error in Edge, works fine in Firefox.)

Further testing from PPK on our MutationObserver implementation showed that we do not implement automatic promotion of attributes: true when attributeOldValue or attributeFilter is set to true (but attributes key is absent). Additionally, when characterData key is absent in the config dictionary, then if characterDataOldValue is set, characterData should be implied as well.

(This is steps 1 & 2 in the observe algorithm from the DOM spec.

(Credit: PPK)


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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “James M.”

      Changed Assigned To to “travil”

      Changed Status to “Confirmed”

      Changed Assigned To from “travil” to “Travis L.”

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