Supported Features and LimitationsΒΆ
Things that work:
- Any selector that
lxml
‘sCSSSelector
can match such as#foo > .bar input[type="submit"]
- media queries are supported (this is treated as nested CSS basically)
- keyframes are left untouched
- You can manually over selectors that should be untouched for things you definitely know will be needed by Javascript code but isn’t part of the initial HTML tree.
- You can analyze multiple URLs and find the common CSS amongst them. (This doesn’t work for inline CSS)
- Comments are left untouched and minute whitespace details are preseved so the generated output looks similar to its input, but with the selectors not needed removed.
- A proxy server apps is available that can help you preview the result of just one URL.
Things that don’t yet work:
- Javascript events that manipulate the DOM tree. You can use PhantomJS to do the downloading but it still won’t get every possible piece of HTML generated based on complex Javascript.
- keyframes are always left untouched even if it’s never referenced
- Broken HTML or broken/invalid CSS isn’t supported and good results can not be guaranteed.
Things that don’t work:
- link tags wrapped in IE-only style comments (e.g
<!--[if lte IE 7]>
) is not supported.