Re: DART vs. GWT

About Dart:

- I really (!) hope that Dart will succeed.

- Ideally, Dart would even become the new JavaScript alternative in all browsers (however, AFAIK a few browser vendors have signaled, that this ain't gonna happen). If not, then it could maybe still be successful with dart2js.

About GWT:

- GWT allows to code in Java for the client side, which is perfect, if you already use Java on the server side.

- There is no significant amount of existing Dart code for the server side, so Dart does not have that advantage.

Conclusion:

"GWT + Dart" would be such an awesome combination: GWT compiling Java to Dart. And then Dart to JS only if necessary.

- This would require changing GWT internals, 

- but it wouldn't require changing the GWT API and programming techniques much (except for low level JSNI and JSO) - remember, that a lot of the GWT API is about manipulating the DOM (which stays the same no matter if the underlying language is JS or Dart), handling browser events, ...

- As long as you want to work with Java on the server side, it's a good idea to use GWT - otherwise you'd have to duplicate common parts of your code for the server (Java) and client side (Dart) - like in the medieval days before GWT. (I hope we'll never have to fall back to that situation.)

Alternative:

The alternative would be that Dart also succeeds on the server side, completely replacing Java. This is rather unlikely, but if things like O/R mapping, fully-fledged IDEs, and anything of value that Java provides is available in Dart someday, plus if it provides any real advantage over Java, then I'm the first one to switch completely to Dart. Then we wouldn't need GWT anymore, and Dart would probably adopt all useful GWT features. (And it should be straightforward to port existing GWT code to Dart.)

On Wednesday, August 22, 2012 5:57:42 PM UTC+2, deepak chauhan wrote:

One question is disturbing me from a long time. Why Google invented DART, when GWT is already there?

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