.babelrc.js

"use strict";

let envOpts = {
  loose: true
};

module.exports = {
  comments: false,
  presets: [
    [
      "env", envOpts
    ],
    "stage-0",
    "flow",
  ],
  env: {
    cov: {
      auxiliaryCommentBefore: "istanbul ignore next",
      plugins: ["istanbul"]
    }
  }
};

if (process.env.BABEL_ENV === 'development') {
  envOpts.targets = {
    node: "current"
  };
  envOpts.debug = true;
};