Allow developers to try out dart2js in their web apps.

Allow developers to try out dart2js in their web apps.

We look for a dart-compiler attribute on the script tag and if it is set to dart2js we use the dart2js generated file.

R=sandholm@google.com
BUG=
TEST=

Committed: https://code.google.com/p/dart/source/detail?r=7418

[kasperl, 2012-05-07 12:52:02]

Adding Vijay as a reviewer. This is kinda hacky but it gives people a quick
(temporary) way of trying out the dart2js output they automatically get when
they chose "Generate JavaScript" from within the editor.

[asandholm, 2012-05-07 13:13:00]

LGTM

https://chromiumcodereview.appspot.com/10388005/diff/1/client/dart.js
File client/dart.js (right):

https://chromiumcodereview.appspot.com/10388005/diff/1/client/dart.js#newcode22
client/dart.js:22: var compiler = "frog";
You could consider using var jssuffix = ".js" or jssuffix = ".js_" instead. Then
you wouldn't need to change anything below except for a single '.js' -> jssuffix
replacement.

[vsm, 2012-05-07 14:14:28]

My first thought would be to add this as a data attribute to the dart.js script.
 E.g., the developer would only need to add:

<script src="dart.js" data-dart-compiler="dart2js">

[kasperl, 2012-05-07 14:17:39]

On 2012/05/07 14:14:28, vsm wrote:
> My first thought would be to add this as a data attribute to the dart.js
script.
>  E.g., the developer would only need to add:
> 
> <script src="dart.js" data-dart-compiler="dart2js">

I'm glad I asked you, Vijay. It sounds like I can basically add any kind of
data-xxx flag on the script tag and find that in dart.js by just accessing that
property (scripts[i]['data-dart-compiler'])? I'll try it out.

[kasperl, 2012-05-08 13:12:15]

PTAL.

[vsm, 2012-05-08 14:47:45]

lgtm!