preset-env: "await is a reserved word"

[IngwiePhoenix]

I tried getting this to work together with the @babel/preset-env package, but had no luck... Is Babel 7 not supported yet?

[ljharb]

It’s unlikely since his package hasn’t had a maintainer in awhile.

[IngwiePhoenix]

Too bad. I really don't want to use generators - partially because I dont know really how they work, and as I am targeting IE11 as well, I would probably need another transpilation step "just" for the generator stuff, whilst the rest of the code uses Promises.

Anyway, here is my .babelrc, maybe you can see the mistake that I don't.

{
  "presets": [
    ["@babel/env", {
      "targets": {
        "node": "current"
      }
    }]
  ],
  "plugins": [
    "babel-plugin-syntax-async-functions",
    "babel-plugin-async-to-promises",
    ["babel-plugin-module-resolver", {
      "alias": {
        "BIRD3": "./src"
      }
    }],
    ["@babel/plugin-proposal-class-properties", {
      "loose": true
    }],
    ["@babel/plugin-transform-react-jsx", {
      "pragma": "h",
      "pragmaFrag": "fragment",
      "throwIfNamespace": false
    }]
  ]
}

Note: I am testing transpiling on the CLI, and will later adapt to WebPack for more browser-specific settings and the like.

[ljharb]

Setting the target to current node won't work in IE 11; you probably want to dial that back a ways.

[vivek12345]

@IngwiePhoenix From what I understand IE11 does not support promises. So you have two options now:-

1. Use bluebird
2. Use a babel plugin to translate promises or async await to generator functions which babel-preset-env already does.

[ljharb]

Or, use an actual promise shim (not bluebird) - either es6-shim or core-js.