I have still been trying to figure out why undo was acting strange and I am
so close. I think that the functionality was all there. It is just a matter
of doing something like the following, but I can't quite figure it out how
to capture the text of the hidden dummy iframe after the undo but nothing
seems to work:
in undo.js:
document.execCommand("undo", false, null);
operation.replacement = textarea.value;
or
document.execCommand("undo", false, null);
operation.replacement =
this.parentDomNode.getElementsByTagName("textarea")[0].value;
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