Is it better to stay with the basic Javascript language or will Dart save me a lot of time? I think Dart looks like very cool software, but will it increase my production? Is Dart code faster than javascript?
Is it a good way to go or is it still unclear whether to choose to learn it?
My goal is to make very good animated websites, with some complex custom transitions. I do well with jQuery, but i want to be more specific and professional than using jQuery plugins and tweak it.
Thank you very much for your help and advice.
It all comes down to what you are trying to do and what your requirements are. I recommend you read some of the Dart vs. Javascript pages (to get both sides of the story) and ask yourself where you stand after reading those.
Here are some quick links from a Google of "Dart vs. Javascript". Please note that these links may not be balanced or even have very good reasons, but I hope they are enough to get you started. I highly recommend that you look for some more comparisons and do your own research on both sides of the issue:
Here's a pro-Dart page, but one that gives details on why the poster likes Dart: http://www.grobmeier.de/10-reasons-why-dart-is-cooler-than-javascript-03012012.html#.UL0kXuT7J8E
And here's a more pro-Javascript angle: http://www.quirksmode.org/blog/archives/2011/10/dart_or_why_jav.html
Again, don't take these links as instructions on whether you should or should not use Dart. Rather, read WHY each link supports one or the other then ask yourself if that reasoning applies to your case.