[html] Unclear spec on Element.dataset #16398
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This issue was originally filed by Ilya.Va...@gmail.com
API says
"The keys for the map must follow these rules:
The name must not begin with 'xml'.
The name cannot contain a semi-colon (';').
The name cannot contain any capital letters."
What happens if attribute starts with xml, etc?
var x = new Element.html('<p data-xml="0"></p>',
treeSanitizer: new NullTreeSanitizer());
x.dataset map is non empty.
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