Issues in mutation-summary

[Ziyuan Yao]

I just developed a Chrome extension that makes use of mutation-summary:

https://sites.google.com/site/phoneticallyintuitiveenglish/

I encountered this issue during the development: Nodes found by a characterData query may not be text nodes. They can be comment nodes, or their parent nodes can be <style> and <script>.

Maybe this is by design. document.CreateTreeWalker() also has similar behaviors.

[Rafael Weinstein]

Glad to hear you're using it!

So, yes, characterData query will return all types of characterData
nodes, which may (as you point out) be children of style or script.

I suppose we could add API to the query so specify what *type* of
characterData node, but the MutationSummary still has to listen for
all types and it would just do the same simple filter that you're
likely already doing.

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