I have noticed that kindlegen 2.9 tool ignores stylesheets that are improperly linked to html files inside ePub files.
For example this case is incorrect and will be ignored by kindlegen during conversion:
Code:
<link rel="stylesheet" href="../Styles/styles.css">
A correct code is:
Code:
<link rel="stylesheet" type="text/css" href="../Styles/styles.css">
So it would be very useful if Sigil validator would check also missing type="text/css".
Is it possible to implement?