Update to es6 module syntax

[MajorBreakfast]

module myModule from 'my-module' became import * as myModule from 'my-module'
http://jsmodules.io/

I think many of you are already aware of that. I'm just posting it as an issue because it needs to be addressed.

[kpdecker]

@wycats @ebryn how are ember and htmlbars using the es6 components? I don't really want to play spec whackamole, particularly with the touchy toolchain that we have and not being 100% sure how existing projects are touching Handlebars es6 files.

[wycats]

@mmun tag, you're it.

[mmun]

@kpdecker I get your concern of spec whackamole. That said I think it's important for a popular project like handlebars to be compatible with https://github.com/esnext/es6-module-transpiler. There's some code that's violating some, I think at this point, well established parts of the spec. I haven't audited the whole code base yet, but for example redefining the import here:

https://github.com/wycats/handlebars.js/blob/master/lib/handlebars.js#L2
https://github.com/wycats/handlebars.js/blob/master/lib/handlebars.js#L30

That said, it's not blocking HTMLBars right now and there are probably more pressing issues.

[MajorBreakfast]

Traceur also supports outputting to AMD. They're also very good at keeping pace with the spec as it evolves. I'm using it since about four months now and as far as I can tell, Google does an excellent job maintaining it. If you chose to, you can even disable other transforms it provides.

[stefanpenner]

@MajorBreakfast it has also fixed alot of its crazy output

[kpdecker]

It looks like es6-module-transpiler has implementing massively breaking changes that requires us to redo our build stack. When I tested their latest CLI implementation against the handlebars lib, it output code that was missing dependencies and also utilized getters meaning IE versions prior to 9 would have to be desupported, which is not going to happen just yet.

If someone can help update the build chain to support this feature and not drop our various build targets (CJS, AMD, UMD), I'm fine with changing to the new syntax, but right now it seems like everything is far to unstable to make it worthwhile.

[kpdecker]

Released in 3.0.2