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https://issues.apache.org/jira/browse/XERCESJ-1397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Glavassevich resolved XERCESJ-1397.
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Resolution: Won't Fix
As discussed, making this change could break compatibility for some
applications, so marking this as "Won't Fix".
> After invoking mutating methods upon CharacterData, DOMCharacterDataModified
> events are always thrown even if the content remains the same (i.e. no change
> happend)
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: XERCESJ-1397
> URL: https://issues.apache.org/jira/browse/XERCESJ-1397
> Project: Xerces2-J
> Issue Type: Improvement
> Components: DOM (Level 2 Events)
> Affects Versions: 2.9.1
> Reporter: Ludger Bünger
> Attachments: DOMCharacterDataModifiedPatch.txt
>
>
> Invoking mutation methods upon the CharacterData interface (e.g. insertData,
> appendData, setNodeValue) always causes a DOMCharacterDataModified event to
> be thrown, even if the underlying character data remains the same (e.g.
> setting the same content twice).
> According to the DOM Level 2 specification
> (http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-MutationEvent),
> the DOMCharacterDataModified is to be "fired after CharacterData within a
> node has been modified".
> It is debatable whether setting the same content twice falls under
> "CharacterData within a node has been modified" so i classified this issue as
> an improvement, not a bug.
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