.babelrc

{
  "presets": [
    "@babel/react",
    ["@babel/env", {
      "exclude": ["transform-regenerator"],
      "targets": {
        "browsers": [
          "last 2 major versions",
          "not <= 0.5%",
          "not dead",

          // No WebRTC support (including datachannels)
          "not ios_saf < 11",
          "not safari < 11",
          "not ie >= 0",
          "not edge >= 0",
          "not ie_mob >= 0",
          "not and_uc >= 0",

          // No WebGL or WebRTC support
          "not op_mini all"
        ]
      },
      // false = do not polyfill stuff unneccessarily
      "useBuiltIns": false
    }]
  ],
  "plugins": [
    [ "react-intl", { "messagesDir": "./public/messages", "enforceDescriptions": false } ],
    "transform-react-jsx-img-import",
    "@babel/proposal-class-properties",
    "@babel/proposal-object-rest-spread",
    // Samsung Internet on the Oculus Go version is stuck at version 5.2, which is a 
    // Chromium 51, as of this writing. It needs babel to transpile async/await.
    "@babel/plugin-transform-async-to-generator"
  ]
}