The Dart Dev Compiler (DDC) is an experimental development compiler from Dart to EcmaScript 6. It is still incomplete, under heavy development, and not yet ready for production use.
With those caveats, we welcome feedback for those experimenting.
The easiest way to compile and run DDC generated code for now is via NodeJS. The following instructions are in a state of flux -- please expect them to change. If you find issues, please let us know.
Follow the Getting the Source steps, and set the environment variable DDC_PATH
to the pkg/dev_compiler
subdirectory within wherever you check that out.
Install nodejs v6.0 or later and add it to your path. It can be installed from:
Note, v6 or later is required for harmony / ES6 support.
Define a node path (you can add other directories if you want to separate things out):
export NODE_PATH=$DDC_PATH/lib/js/common:.
Compile a test file with a main
entry point:
dart $DDC_PATH/bin/dartdevc.dart --modules node -o hello.js hello.dart
Note, the hello.js
built here is not fully linked. It loads the SDK via a require
call.
Run it via your node built in step 1:
node -e 'require("hello").hello.main()'
Compile multiple libraries using summaries. E.g., write a world.dart
that imports hello.dart
with it's own main
. Step 5 above generated a summary (hello.sum
) for hello.dart
. Build world:
dart $DDC_PATH/bin/dartdevc.dart --modules node -s hello.sum -o world.js world.dart
Run world just like hello above:
node -e 'require("world").world.main()'
Node modules do not run directly on the browser or v8. You can use a tool like browserify
to build a linked javascript file that can:
Install:
sudo npm install -g browserify
and run, e.g.,:
echo 'require("world").world.main()' | browserify -d - > world.dart.js
The produced world.dart.js
fully links all dependencies (dart_sdk
, hello
, and world
) and executes world.main
. It can be loaded via script tag and run in Chrome (stable or later).
Please file issues in our GitHub issue tracker.
You can also view or join our mailing list.