WebKit currently only has support for CSS 2.1 spec of "text-decoration" property. CSS3's "text-decoration-skip" is implemented here. This is an individual task for bug 58491.
More info about "text-decoration-skip" property can be found here:
Parsing support is implemented in bug 958484. Rendering support will come later.
Rendering support is handled on bug 95856.
*** This bug has been marked as a duplicate of bug 123358 ***