Dart Separation

Question

Is there any way to split the code in Darth? I would like to postpone the loading of some rarely used code in order to speed up the loading of the source code. In Javascript, I would add a new <script> , in GWT I would just call GWT.runAsync() . Is there something similar in Darth?

According to this link , <script> injection will not work ("Each HTML page can contain no more than one Dart script tag," "We do not support the dynamic injection of a tag that loads the Dart code."). I also found this fixed problem by stating: "The initial [use case] is delayed loading to avoid bulk downloads when some code is needed only later or maybe only needed in some situations. We now have a mechanism for this." Unfortunately, I could not find anything about how to implement this. Does anyone know about this?

Answer 1

September 2014 update: it is fixed!

Now Dart easily supports deferred loading using the special import... deferred syntax. For instance:

 import analytics.dart deferred as analytics void main(){ analytics.loadLibrary.then((_) { // future // code ready enableAnalyticsControl() }); } 

Here's the official tutorial on using lazy loading.

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I'm afraid that what you are trying to do is still not possible (it is assumed that you are not using dart2js).

See this issue .

As Kasper said in comment 3, the deployment feature that you get with dart2dart has so far been discussed. The involvement of virtual machines in supporting this ends up giving dart2dart a generated access code for lazy downloads through a library call. This library API still needs to be specified.

If you use dart2js, this can be done. Here is a blog post on how to do this.

 const lazy = const DeferredLibrary('reverser', uri: './part.js'); 

Which allows you to call lazy.load().then((_) { ...