Error Expected to return a value at the end of arrow function

Question

const jwt = require('jsonwebtoken');

module.exports = (req, res, next) => {
  try {
    const token = req.headers.authorization;
    const decoded = jwt.verify(token, 'somes');
    req.user = decoded.user;
    next();
  } catch (error) {
    return res.status(401).json({
      message: 'Auth failed',
    });
  }
};

This is my check-auth middle ware I've configured AirBnB coding standards for this expressjs project.

I got an linting error. What does this really mean and how can I get rid of this error? Is it okay to put return statement in front of the next() function call like this return next(); How does that affect to the code?

error Expected to return a value at the end of arrow function consistent-return

Have you tried adding return next();

Teddie
– Teddie

2019-05-03 05:35:01 +00:00
Commented May 3, 2019 at 5:35 — Teddie
– Teddie, Commented May 3, 2019 at 5:35

jameslol · Accepted Answer · 2019-05-03 05:07:44Z

2

It's complaining that one of your code paths is returning a value, but the other isn't. Returning a value isn't necessary here.

Change

return res.status(401).json({
  message: 'Auth failed',
});

to

res.status(401).json({
  message: 'Auth failed',
});

answered May 3, 2019 at 5:07

jameslol

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Comments

ANDRES FELIPE PINCHAO RAMIREZ · Accepted Answer · 2021-03-26 22:16:55Z

1

In my case I had my function that is inside the hook useSelector and I was using it together with the keys

   const petitions = useSelector((store) => {store.cachePetitions.results});

My solution only remove the keys and thus the error generated by eslint disappeared

const petitions = useSelector((store) => store.cachePetitions.results);

answered Mar 26, 2021 at 22:16

ANDRES FELIPE PINCHAO RAMIREZ

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