Some widgets are not correctly validated on W3 validator
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onkelandy commented
Some widgets contain attributes not allowed by HTML standards, e.g. "
They should be renamed to data-orientation, etc. in the HTML and JS files.
Some img don't have alt attributes
wvhn commented
Checks have been performed on all docu pages and widgets. Corrections have been implemented with #522 .
Open Point: some unknown attributes mainly in multimedia widgets (e.g. "stoptimer", "timer" ...). The widgets work fine but of course the attributes can not be interpreted by the browser.