Please unassign if this is not an IO lib issue. Possibly assign to Dart2JS then?

Added Area-UI, Triaged labels.

This comment was originally written by off...@mikemitterer.at

OK, you are right. It's probably Dart2JS. Are you forwarding this ticket to Dart2JS or do I have to do that?

I ran into this bug again trying to get js.dart + jQuery to work together: https://github.com/dart-lang/js-interop/issues/21

Refiled on dart2js. It appears that both dart2js generated code and jquery use a global '$' symbol in incompatible ways.

Removed Area-UI label.
Added Area-Dart2JS label.

cc @ErikCorryGoogle.
Added this to the Later milestone.

Issue #6853 has been merged into this issue.

This comment was originally written by shyc2...@gmail.com

I get both dart2js and jQuery working by calling jQuery.noConflict(). It releases the $ symbol which is causing the conflict.
Then I declare "var $ = jQuery;" as local variable, and the jQuery code after that works fine for me.

This comment was originally written by theme...@gmail.com

Will this issue be fixed in dart2js? It's annoying when use libraries depend on jQuery,
I cannot put "var $ = jQuery;" int libraries every time.

Added TriageForM5 label.

cc @peter-ahe-google.
Removed this from the Later milestone.
Added this to the M5 milestone.
Removed TriageForM5 label.

We should definitely try to avoid introducing global names.

For possible work arounds, take a look at: http://learn.jquery.com/using-jquery-core/avoid-conflicts-other-libraries/

Some of the techniques suggested in that document could also be used by dart2js.

Removed this from the M5 milestone.
Added this to the Later milestone.

I needed to clean up how we access $ in some helper methods, so I added an option to control the name of $ to help me test it.

https://codereview.chromium.org/16135004 adds option --global-js-name to dart2js.

Added Started label.

Fixed in r23391.

Added Fixed label.

This comment was originally written by kholbr...@sonardesign.com

This is still a problem with the build from 23799.
Is is fixed to not abuse "$" or just to have the work-around flag?
This is a serious problem, please fix correctly by not abusing "$".

kholbrook, what is, in your opinion, a correct fix?

This comment was originally written by kholbr...@sonardesign.com

Do not abuse "$".
There is no reason to obliterate "$", which is the most widely used mechanism for javascript libraries to add extensions on the planet. Seriously.
Developers world-wide use jQuery, which everyone knows uses "$".
There is no reason dart2js can not put the generated code in a global with a name specific to Dart. This is exactly what we are all forced to do to make it work. Forcing a default that causes serious compatibility problems is not the correct approach. Not to mention being forced to use the work-around flag means you are forced out of the editor and having to use the command-line to invoke dart2js, since the editor does not support options for dart2js invocation. This breaks workflow, this breaks compatibility. This is just plain wrong.

Ideally, dart2js should generate code wrapped in something like this:

!function($) {
...
}({})

Unfortunately, we discovered that this had an adverse effect on performance. Fortunately, the V8 team has since been working on fixing this issue, and we hope to be able to completely eliminate the use of global variables.

For now, offering an option is the best we can do.

This comment was originally written by kholbr...@sonardesign.com

In the interim, would it be possible to make the default "$dart"?