This package is intended to be used as a development dependency for users of package:build who want to run code in a browser. Simply add the following to your pubspec.yaml:
dev_dependencies: build_web_compilers:
If you are using the autogenerated build script (going through pub run build_runner <command> instead of handwriting a build.dart file), then all you need is the dev_dependency listed above.
By default, the dartdevc compiler will be used, which is the Dart Development Compiler.
If you would like to opt into dart2js you will need to add a build.yaml file, which should look roughly like the following:
targets: $default: builders: build_web_compilers|entrypoint: # These are globs for the entrypoints you want to compile. generate_for: - test/**.browser_test.dart - web/**.dart options: compiler: dart2js # List any dart2js specific args here, or omit it. dart2js_args: - -O2
If you are using a custom build script, you will need to add the following builder applications to what you already have, almost certainly at the end of the list (unless you need to post-process the js files).
[ apply( 'build_web_compilers|ddc', [ (_) => new ModuleBuilder(), (_) => new UnlinkedSummaryBuilder(), (_) => new LinkedSummaryBuilder(), (_) => new DevCompilerBuilder() ], toAllPackages(), // Recommended, but not required. This makes it so only modules that are // imported by entrypoints get compiled. isOptional: true, hideOutput: true), apply('build_web_compilers|entrypoint', // You can also use `WebCompiler.Dart2Js`. If you don't care about // dartdevc at all you may also omit the previous builder application // entirely. [(_) => new WebEntrypointBuilder(WebCompiler.DartDevc)], toRoot(), hideOutput: true, // These globs should match your entrypoints only. defaultGenerateFor: const InputSet( include: const ['web/**', 'test/**.browser_test.dart'])), ]