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When I load jQueryUI on a Windows XP machine using Firefox 3.6.3, I get a bunch of css errors:
Error in parsing value for 'filter' Lines 18, 76, 77.
Unknown property 'border-top-left-radius' Line 274.
Unknown property 'border-top-right-radius' Line 275.
unknown property 'zoom' Lines 300,306,336,345,385,408.
Q: Should I just ignore these errors?
The basic reason for these CSS errors is that every browser has its own set of CSS properties that jQuery UI makes use of. For example:
-moz-user-selectis only available in Firefox and Mozilla-based browsers.Equivalent to this property, WebKit-based browsers (like Google Chrome and Safari) have
-webkit-user-select.jQuery UI makes use of these special CSS properties available in different browsers and this gracefully degrades to nothing if the browser doesn’t support that particular property. jQuery UI makes pretty sure that all its widgets appear consistent across browsers. And that is the reason why its safe to avoid such errors without any visual artifacts being generated by them.