eslint Parsing error: Unexpected token function with async

Question

I am getting the following error in async usage on ESLINT.

eslint Parsing error: Unexpected token function with async

Here is my eslintsrc

{
  "extends": "airbnb-base",
  "rules": {
    "no-console": "off",
    "func-style":"error",
    "import/no-extraneous-dependencies": ["error", {"devDependencies": false, "optionalDependencies": false, "peerDependencies": false, "packageDir": "./"}]
},
"parserOptions": {
  "ecmaVersion":8
 }
}

UPDATE

Here is my async

const get = async function get(req, res) {
  const user = await service.get();
  console.log("From db",user.username);
  res.send('ok');
};

Can you please also share the use of `async` it's raising the error about? — Jonathan Lonowski, May 11 '18 at 05:58
Not seeing the same error for the snippet, at least with [ESLint's demo](https://eslint.org/demo/). – Possibly a typo? You mention the settings are saved in `eslintsrc`. There shouldn't be a 2nd `s` in the file name. — Jonathan Lonowski, May 11 '18 at 06:19
Its a typo the filename is `eslintrc` but still i am getting the same error from eslint — shamon shamsudeen, May 11 '18 at 06:29
Just in case this is happening to people using `async/await` for the first time. This error also appears if you use `await` inside a function that is not defined as `async`. In which case it's not an EsLint configuration issue, but rather a syntax error. — Mig82, Nov 30 '20 at 09:48

score 138 · Accepted Answer · answered Dec 21 '18 at 11:25

138

I was getting this error also, I added the following to my eslintrc:

{
  "env": {
    "node": true,
    "es6": true
  },

  "parserOptions": {
    "ecmaVersion": 8
  }
}

answered Dec 21 '18 at 11:25

Damo

5,698
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6

"parserOptions": { "ecmaVersion": 8 } works for me! – Detoner Feb 08 '21 at 12:36
It works because you add the support for async – alexalejandroem Jun 04 '21 at 11:25
1

This doesn't work currently with similar file with `commonjs` `es6` `node` `mocha` tru in env and parserOptions `requireConfigFile: false` `parser: "@babel/eslint-parser"` `"ecmaFeatures.ecmaVersion": 2018` and `"sourceType": "module"` – Pim van der Heijden Jun 15 '21 at 11:19
This did not resolve it for me. I am using the latest version of everything and still getting the error. – Scorb Dec 30 '22 at 19:40

score 6 · Answer 2 · answered Dec 26 '19 at 18:15

6

In my case it got fixed when I just changed from:

"parserOptions": { "ecmaVersion": 8 }

to

"parserOptions": { "ecmaVersion": 2018 }

answered Dec 26 '19 at 18:15

darmis

2,879
1
19
21

changed what ?. – madhairsilence Feb 08 '21 at 08:01

Pathan Faisal Khan · Answer 3 · 2018-05-11T06:31:26.287

1

It's an error regarding func-style. By default it uses type expression, and the correct way to represent functions using this as expression is:

const get = async get(req, res) {
  const user = await service.get();
  console.log("From db",user.username);
  res.send('ok');
};

Check the docs for further examples, https://eslint.org/docs/rules/func-style

UPDATE: Forgot to see you have added error, what you were doing was right,

const get = async function get(req, res) {
  const user = await service.get();
  console.log("From db",user.username);
  res.send('ok');
};

Just remove func-style from eslint.

edited May 11 '18 at 06:31

answered May 11 '18 at 06:26

Pathan Faisal Khan

33
7

got another error [eslint] Parsing error: Unexpected token get [js] ',' expected. – shamon shamsudeen May 11 '18 at 06:28
Updated the answer, please check it once. – Pathan Faisal Khan May 11 '18 at 06:31
you are asking to remove func-style` from eslintrc rules?? – shamon shamsudeen May 11 '18 at 06:34
Yes, remove it. – Pathan Faisal Khan May 11 '18 at 06:34
removed but still i got the error i am using airbnb style guide – shamon shamsudeen May 11 '18 at 06:35
I do not have any rules or recommended rules within my eslint file and no file supersedes my esline file and I still get that error. Does that mean this is activated within eslints core automatically? – Ini Jul 30 '19 at 09:22
`"rules": {"func-style": "off"}` did not work for me – user210757 Jun 23 '21 at 21:57

score -6 · Answer 4 · answered Jun 23 '20 at 14:16

-6

If you are new in the project I recommend just to go back with promises :)

function openTabs(array) {
    return new Promise((resolve, reject) => {
        //... your code
    });
}

answered Jun 23 '20 at 14:16

ValRob

2,584
7
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Bad answer. You shouldn't change something like this because of ESLINT, especially when it won't cause an exception when running it, this is just asking for a more tedious approach. – Epic Speedy Dec 02 '20 at 17:06

eslint Parsing error: Unexpected token function with async

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