Top level this is replaced by undefined

[bjouhier]

See #298

[bjouhier]

Problem comes from babel/babel#562

I tried to introduce my own (function() { ... }).call(this) IIFE at top level but babel is stubborn and keeps replacing the this by undefined.

[bjouhier]

The solution seems to be to blacklist the strict plugin. It can be done via .streamline.json:

{
  "runtime": "callbacks",
  "babel": {
    "blacklist": ["strict"]
  }
}

I'd rather keep this plugin enabled by default.

[aseemk]

Good to know that ES6 modules explicitly define this as undefined — so my use of top-level this isn't wise anymore. Agreed Streamline shouldn't change this by default. Maybe this could be documented, e.g. in the FAQ. Thanks!

[bjouhier]

There was nevertheless a problem with the wrapper that streamline is generating if it detects async calls at top level. I'm fixing it in the plugin.