Scala.js v0.3 released!

[Sébastien Doeraene]

Hi all,

We're excited to announce the release of Scala.js v0.3. It's been only 40 days since v0.2, and yet so much has been improved, added and fixed since then, thanks to all the contributors.

To upgrade, simply update the version of your dependency in project/build.sbt. You can also remove any extra resolver that was previously necessary, as the Scala.js sbt plugin now resolves by default, and itself adds the appropriate resolvers for libraries.

New features

• Support of Futures and Promises. Two JavaScript-friendly ExecutionContexts are provided: scala.scalajs.concurrent.JSExecution.{queue, runNow}.
• Parameters with default values, aka optional parameters, can now be used when writing types for JavaScript API. It is not necessary to use endless overloads anymore.
• Add methods and operators to access all the JavaScript constructs we were still missing (typeof, delete, in, comparisons, etc.)

Improvements

• The output of the packageJS and optimizeJS tasks are now configurable, which provides for easier integration into a Play application.
• Support for scala.Symbol
  
• Better support of scala.Enumeration: elements declared with
  val Monday, Tuesday, Sunday = Value
  are now supported. Previously it had to be
  val Monday = Value("Monday")
  val Tuesday = Value("Tuesday")
  val Sunday = Value("Sunday")
• Compile-time, user-friendly error messages for illegal declarations of JS types (e.g., nested inside a class or trait). Previously it would blow up at runtime.
• Support Throwable.printStackStrace
• js.Dictionary is now generic in the type of the elements stored.
  

Bug fixes

You may find the complete list of bug fixed since v0.2 in the issue tracker, but what you really need to know is this:
Scala.js now passes all the tests of the Scala test suite itself that are supposed to pass.

Some tests are disabled because they rely on features not supported by design, for example runtime reflection. But all the ones that are supposed to pass do pass. This is a major proof of maturity and stability of Scala.js. Most of the hard work for this to happen is due to Tobias Schlatter.

A big thank you to all the contributors!

With a big news: I am not the first committer anymore!

#	Author
61	Tobias Schlatter
38	Sébastien Doeraene
9	Sandeep
6	Jonas Fonseca
4	Li Haoyi
1	Dylan Arnold
1	Alistair Johnson
1	Piotr Kolaczkowski
1	Peluko

Complete commit list!

sha	Title
c8e7c05	Version 0.3.
a99d8df	Math hypot, expm1, sinh, cosh, tanh
a0ea9d0	Fix #232: "smart" js.Dynamic.literal
51b1acb	Give version-dependent files a versioned name.
a4685ef	Give version-dependent files a versioned name.
4ec7ee6	Compile scalalib overrides with the scalalib, not the library.
c9195b6	Fix #261: reversi-opt broken.
bacb075	Fix #256: Add js.Object.hasProperty(o, p) as equiv. to `p in o`.
5fcc5a1	Review js.Dictionary as a generic class <: js.Object.
b5e0b15	Fix #255: Add method js.Dictionary.delete() for the delete keyword.
9b02e28	Classify last partests. With this commit, Scala.js reaches full partest coverage
bbab743	Fix #250: Reflective calls on Array.update with relaxed return type
9032fb1	Classify almost last partest
905e1a8	Fix #219: No bridges (and refl proxies) for macros
0dabc60	Remove 'extends NotNull' for 'js.Undefined'.
9608367	Fix dependencies of scalajs-library.
ea4a2e7	Fix #218: class literal for existential value classes.
8c54027	Fix #220: Correct runtime return type for boolean & and | ops
db8238e	Fix #241: Fix reflective call proxy generation
79b4c3d	Formatter's behavior for out-of-range integers and x, X, o.
f71303e	Fix #217: toHexString wrong for negative numbers.
78e6470	Fix #213: Correct reflective call rewrite for methods on string with relaxed ret
38b7f28	Fix #215: Reflective calls on comparison ops on primitives
fe4a470	Fix #216: Correct hashCode for boxed Chars
70d6320	Return "undefined" when calling .toString() on JS undefined.
79e5eb0	Backport source changes in compiler/ from scala-2.11.
0c1463a	Add implementation for String.equalsIgnoreCase
d6f0c55	Add Scala.js specific scala.Symbol implementation
313ce40	Fix #225: provide an equivalent of JS' `typeof x`.
65680bb	Fix #211: java.util.Formatter does not support `n` conversion
a103dca	Fix #228: Add primitive js.debugger() mapping to debugger statement.
33774c7	Fix #184: Add support for Throwable.printStackTrace().
372cd8c	Unwrap JavaScriptException when it's thrown.
8a8ae78	Fix definitions of operators on js types.
a633e8f	Classify and file the last partests.
8ee8db3	Protect receiver of reflective call from double evaluation
1414e21	Make reflective calls on js.String work
8cd5341	Make reflective calls on scala.Array work
c9fc450	Fix #195: Reflective calls on primitive value types
3ea37f7	Remove js.Function.apply().
5e7c6d9	Fix #204: Restrict ancestors of classes extending js.Any
8befb71	Make the path of the output of optimizeJS configurable.
b0e36d3	Fix #200: Enumeration fix was complaining about Enumeration implementation
ba4d8b8	java_lib lang.Math nextUp, nextAfter, ulp for Double
52cb21c	Forward constructor on String to RuntimeString (equivalent to methods)
19593ca	Add proxy object for java.lang.String implementations
f1738c7	Add missing comparison ops to js.String and fix compiler to support them
3f8ae74	Classify partests
8405296	Fix #192: Fully support (sane uses) of scala.Enumeration
3b1e380	Refactor JSInterop transformer state management
3752b68	Fix #110: Proper support for reflective calls
7be48cd	java_lib cbrt
158b079	Fix #183: Add Thread.currentThread() to support Future.flatMap.
9ae6343	Added function's to Java.lang.Math
fdd6ad0	Fix #178: Add bridges for methods inherited from traits
4921dbb	Fixed escaping of file separator on windows when relativeSourceMaps is enabled
b480445	Fix java Regex behavior with empty matches (fixes #156)
4c89c64	Name-mangle illegal JS identifiers (fix #29, fix #153)
95fe460	Fix #165: Name mangle private methods
037d859	Remove lingering println
09eb1eb	Fix #163 completely added for AnyRef
525d45c	Re-Classify buglisted partests after fixes
3f59f11	Fix #149: Implement String.hashCode()
c66bbbc	Make runtime.Long constants compile time consts
bee978b	Fix #168: Allow to pseudo-flush JS Console
a5e512b	Remove lingering trailing whitespace
d46c5ee	Fix #172: Patch java.lang.Long.numberOfLeadingZeros
f8ce0b2	Fix #155: Allow null w/o NPE in StringBuilder where appropriate
e8f9797	Fix #152: Coercing to char yields unsigned value
2e288ad	Fix #150: Raise exception on failed String to numeric conversion
3e25f7a	Fix #151: Corner cases for Double/Float toString
aa9066e	Fix #157: Add trailing $ to names returned by getClass.getName on objects
32b5df8	Fix #166: Correctly handle special types scala.Nothing and scala.Null
42c5753	Partial #163: Added Copyto and copyOfRange for Java Arrays for Int, Long, Short,
41b8e19	Add tests for Arrays.binarySearch range checks
39741aa	Remove exceptions duplicated in java.util and already defined in java.lang
2bd2f17	Implemented AtomicXXX and YYYReferences in javalib, including tests
6d2d421	Implemented java.util.Arrays Binary Search for Float, Double and Anyref
67842f2	Binary Search for java.util.Arrays
c5ee2f1	Allow setting of package directories
b59ddb3	Added java_lang_Object to its own ancestor hash
0cabeac	updated corejslib to use 1 instead of true for ancestor maps
227e075	Swap out booleans in ancestors map with ints
6cb21cd	Added option 'relativeSourceMaps' to sbt plugin
b628b24	Fix #158: Implement java.util.Random.nextLong()
174d28c	Change 'outstanding' to 'noteworthy' in the README
5f0e7e1	File and classify buglisted tests
76d30fc	Create partest coverage script and fix test lists
d37d706	Classify (supposedly last) partests
c716602	Classify partests
67336e9	Have Travis check the size of reversi outputs.
4775e0a	Fix #135: Prevent bloated optimized size due to dropLZ method
fb718a6	Implement java.util.concurrent.TimeUnit.
5a6efac	Fix #68: JS optional arguments via Scala default arguments in interop
244ffe1	Towards v0.3 again.
dce59d0	Version 0.2.1.
6aac7a1	Whitelist partests that now succeed
76d1a9a	Fix #125: Correctly resolve overload when converting scala.Function to js.Functi
11d955f	Clean-up of settings related to the ScalaJSEnvironment.
c0a9174	Fix #124: Add setting to opt-out setup of the Scala.js runner.
8cd299b	Fix #123: do not load the test framework if its class is not there.
fa8f48a	Remove unnecessary semicolon
46f850a	Fix #88: Implement AbstractPromise, add simple ExecutionContexts for JavaScript
e8e865b	Add methods to mock JS clock to Jasmine wrapper
e276050	Implemented System.nanoTime
f9ee4a4	Whitelist three new tests which now pass.
2bf8a5b	Allow to publish releases to Bintray.
ef95470	Implement java.lang.Character.isWhitespace
4cc6fe6	Fix #113: Prepend a Char to String
01873cc	Fix #116: Correct comparison for boxed Float and Double
5977b60	Fix #104: Correct hash for boxed Byte, Short and Int
118b40d	Fix #109: Handle LabelDef for while (false) {}
5cd0ffb	Fix #117: Implement java.lang.Character.digit
8f7f67d	Add test suite for Java regex emulation.
7b01f45	Classify a couple of buglisted tests (File / Blacklist / Whitelist)
90837bd	Cleanup buglist (file bugs or blacklist)
1842f42	move run/array-charSeq.scala to whitelist (fixed in #55)
0e12724	Display warning when the scalalib/source submodule is not up-to-date.
997d3c3	Fix #102: test:packageJS and compile:packageJS have the same outputs.
d157559	Move scalaJSExternalCompileSettings outside the sbt plugin.
6c7f001	Fix Travis config.
e57ad17	Towards 0.3.

Enjoy this new epic release of Scala.js!

Sébastien

[Erik Bruchez]

It's really exciting. Thanks for all the hard work!

-Erik

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[Sebastian Nozzi]

Awesome release! Thanks for making it happen!

[Simon Ochsenreither]

Wow, really impressive!

Congratulations and thanks for all the hard work!

[Justin du coeur]

Yeah, very neat stuff.  This project has gone from "you've got to be out of your mind" to being one of the most intriguing-looking ways to code for the Web in a remarkably short time...

On Fri, Feb 14, 2014 at 7:51 AM, Simon Ochsenreither <simon.och...@gmail.com> wrote:

Wow, really impressive!

Congratulations and thanks for all the hard work!

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[Suhku Huh]

Great news, congratulations!

Thanks, everyone !!!

[Peluko]

Great! I think that Scala.js will be a major actor on client side web programming.

With Scala I've recovered the fun and zen of programming that I've lost since I left C++ in favor of Java and C#. And with Scala.js I can apply it to the browser.

I never felt comfortable with client side web programming, it's a chaotic world, a bunch of technologies and tools with Javascript messing it all. But now I'm really enjoying it. Thanks.

[Sebastian Nozzi]

Me feelings exactly.

Scala gave me back the joy to program, that I had lost after believing I would forever move from boring-to-boring Java Enterprise Developer job.

But even if Scala is great, and the whole experience of developing in Scala is great (from the language itself to the tools, to the ecosystem), as a web developer there always was this unavoidable "stone in the shoe"... Not only unavoidable but increasingly relevant, powerful and inescapable... JavaScript.

And of course the experience of developing in JavaScript is completely different than the Scala one. For me worse. For others better. But definitely different.

For me Scala.js is invaluable because it makes the circle complete: it provides that same "experience" of Scala (back-end) to web front-end development. An area I've been trying to avoid because that same "experience" was lacking...

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