Investigate upgrade to the latest MutationObserver.js

[mmansoor-magento]

Overview

For the MutationObserver.js library we need to identify the following additional details:

• If this library is used on Admin UI or Storefront Luma or both
• What exact functionality is using this particular library
• What is a preliminary scope of work to migrate to the new version.
• Is it possible to migrate without introducing BIC into Luma
• Level of the impact of updating dependency in terms of BIC

Investigation Outcome

A complete report of affected areas, ways to migrate code, and level of BIC caused by migration.

[m2-assistant]

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[m2-assistant]

Hi @ihor-sviziev. Thank you for working on this issue.
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[ihor-sviziev]

As I said in #32851 (comment) , we can safely remove the MutationObserver, as all supported browsers already have native support of it