Babel-eslint: Parsing error: await is a reserved word

[AuthorProxy]

I want to try dynamic import (https://developers.google.com/web/updates/2017/11/dynamic-import) at my project.

module.exports = {
  env: {
    browser: true
  },
  parser: 'babel-eslint',
  parserOptions: {
    ecmaVersion: 9,
    sourceType: 'module',
    ecmaFeatures: {
      jsx: true,
      impliedStrict: true
    }
  },
  plugins: ['react', 'babel'],
  extends: ['airbnb'].concat([
    './rules/best-practices',
    './rules/es6',
    './rules/possible-errors',
    './rules/strict-mode',
    './rules/stylistic-issues',
    './rules/variables'
  ].map(require.resolve)).concat([
    './rules/react',
    './rules/babel'
  ].map(require.resolve))
};

{
  "presets": [["env", {
    "debug": false,
    "modules": false
  }], "stage-0", "react"],
  "plugins": [
    "react-hot-loader/babel",
    "syntax-dynamic-import",
    "transform-class-properties",
    "transform-decorators-legacy"
  ]
}

    "babel-core": "^6.26.0",
    "babel-eslint": "^8.2.2",
    "babel-loader": "^7.1.4",
    "babel-plugin-syntax-dynamic-import": "^6.18.0",
    "babel-plugin-transform-decorators-legacy": "^1.3.4",
    "babel-plugin-transform-flow-strip-types": "^6.22.0",
    "babel-preset-env": "^1.6.1",
    "babel-preset-flow": "^6.23.0",
    "babel-preset-react": "^6.24.1",
    "babel-preset-stage-0": "^6.24.1",
    "eslint": "^4.18.2",
    "eslint-config-airbnb": "^16.1.0",
    "eslint-loader": "^2.0.0",
    "eslint-nibble": "^4.2.1",
    "eslint-plugin-babel": "^4.1.2",
    "eslint-plugin-flowtype": "^2.46.1",
    "eslint-plugin-import": "^2.9.0",
    "eslint-plugin-jsx-a11y": "^6.0.3",
    "eslint-plugin-react": "^7.7.0",

  if (module.hot) {
    module.hot.accept('../reducers', () => {
      // eslint-disable-next-line global-require
      // const rootReducer = require('../reducers').default;
      const rootReducer = await import('../reducers');
      store.replaceReducer(rootReducer);
    });

But get an error from eslint Parsing error: await is a reserved word

[nicolo-ribaudo]

await can only be used inside async fuctions (async function foo() {} or async () => {}),

[MiLeung]

@nicolo-ribaudo That's what I have but am still getting the error.

[Ankrat]

module.hot.accept('../reducers', **async** () => {
      // eslint-disable-next-line global-require
      // const rootReducer = require('../reducers').default;
      const rootReducer = await import('../reducers');
      store.replaceReducer(rootReducer);
    });

Have you tried to add the async in your arraw function?
_await_ can't be used elsewhere.

[MiLeung]

Forgot about this issue, but yeah I think that was it - forgetting to make the callback function async

[szalapski]

It would be nice if babel could say "await can only be used if the function is marked async" instead of this cryptic error.

[kaicataldo]

For anyone stumbling across this issue, improving the error output caused by using await in a non-async function is tracked by https://github.com/babel/babel/issues/6720