[css-text-decor] Note about 'text-decoration' backwards compatibility is wrong #7088
Description
https://www.w3.org/TR/css-text-decor-4/#text-decoration-property
Value:
<'text-decoration-line'> || <'text-decoration-thickness'> || <'text-decoration-style'> || <'text-decoration-color'>
Note: A text-decoration declaration that omits both the text-decoration-color and text-decoration-style values is backwards-compatible with CSS Levels 1 and 2.
That's wrong, in CSS2.2 the grammar was
Value:
none | [ underline || overline || line-through || blink ] | inherit
So effectively a text-decoration declaration with <'text-decoration-style'> or <'text-decoration-color'> is not backwards-compatible.
But it's also not backwards-compatible if:
- It has
<'text-decoration-thickness'>. - The
<'text-decoration-line'>isspelling-errororgrammar-error