Error using async in Nodejs

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I have a system in Nodejs in development and finished a step, for the purpose of testing, I put it on a server and from that began to return me error in all lines of code in which I used the async functions.

Error:

async index(request, response){
SyntaxError: Unexpected identifier
...

Code:

const Authentication = require('./AdminAuthController');
module.exports = {
async index(request, response){ // esta é a linha do erro
    const { admin } = request.headers;
    const auth = await(Authentication.checkAuthentication(admin));
    return response.json(auth);
}

My biggest problem is finding the reason to return this error, and in the tests I did on the localhost, all requests worked normally.

javascript node.js async

  • why doesn’t it module.export =async index(request, response){
 const { admin } = request.headers;
 const auth = await(Authentication.checkAuthentication(admin));
 return response.json(auth);
}, you are exporting an object and not a function.

  • Below are other functions

  • 2

    It’s probably a version problem. What version of Node.js do you use on your local computer and what version of the server Node?

  • I think this is the same problem. My computer is version > 10.1 and the server is 6.1

  • 1

    https://medium.com/balta-io/nodejs-async-await-21ca3636252a. Victor please update to 8.0

1 answer

3


The problem is the version of Node.js that you are running on your server. Resources like async/await entered from Node.js 7.6. That way, since you are using the version 6, these features have not yet been implemented, which causes the syntax error.

Because of this, I suggest you upgrade to some version LTS after the version 7.6, like Node.js 8 or 10.

It is important to stress that it is always good to use an LTS version in a production environment. To learn more about the Node.js version scheme and understand why, see this document.

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