Thanks for this? Is there a plan for merging this soon ?

I bow!

I think a lot of issues on Angular repo should be closed by this, and even more on S.O.

@filipesilva how can I make this work so that AOT builds use es2015, but ng serve during development uses es5?

@pgrm Good question, I am trying to figure out that aswell... (as ng serve does not seem to work with es2015)

What about ng serve --aot?

@misaunde I do remember in the old and forever long ng serve is slow issue, that people got told, to not use ng serve --aot because it's slow. Also, I think you can't run unit tests in AOT. So I'm wondering what angular 5 will bring in this regard, because I'm reading everywhere, that AOT will be there by default. But an issue regarding AOT in unit tests is still opened. Maybe @filipesilva could shed some light on what is the best approach now, and how will that probably change with angular 5?

@pgrm AOT is now much faster with 1.5 and Angular 5 (at the same time), but we won't switch AOT to be the default in 1.5.

@pgrm #7797 is still blocked on Angular itself for now... I'll respond there with a workaround for now.

@misaunde ng serve --aot will also use es2015 if you have it set in your tsconfig.

Does this config apply to global scripts referenced in apps[0].scripts in angular-cli.json? I am using CLI 1.5.4 with "target": "es2015" and still seeing the Unexpected token error with a prod build when the scripts use es2015 syntax

I've installed uglify-es and set my to "target": "es2015" but I am still experiencing an Unexpected token error with a prod build.

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