Cannot use es6 import and export with sequelize

Question

I am using convictjs to manage the configuration files for my nodejs application. The file that has the configuration schema is called "config.js" and it is in the "config" folder.

I am using es6 import and export statements

import convict from "convict";
import dotenv from "dotenv";
import configDev from "./config.dev";
import configProd from "./config.prod";
import configStage from "./config.stage";
.
.
.
export default config.getProperties();

These configuration files contain database credentials and other necessary database information, which I use in the "index.js" for the sequelize models.

Note: Early on in the development process we tried using es6 with sequelize ran into other problems so we opted to using es5 for models, migrations and seeds.

Currently whenever I try to execute migrations, seuqlize throws an error as shown below

ERROR: Error reading "config\config.js". Error: SyntaxError: Unexpected token 
import

Babel is setup properly, I can transpile and run the application without any issues except for database migrations. Any help to resolve this issue is much appreciated.

Possible duplicate of Node error: SyntaxError: Unexpected token import — Dez
– Dez, Commented Oct 11, 2018 at 15:09

Eugene Tsakh · Accepted Answer · 2018-10-11 15:07:00Z

3

As far as I know Node.js does not support this syntax yet so you should either use require or transpile your code with babel before the execution.

UPD: seems like it's possible to enable ES6 modules in Node.js starting from v10.12.0 https://nodejs.org/api/esm.html

node --experimental-modules my-app.mjs

answered Oct 11, 2018 at 15:07

Eugene Tsakh

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11 Comments

Kaan Yalti Over a year ago

I am traspiling my code, the whole application aside from the sequelize scripts is written in es6.

Kaan Yalti Over a year ago

My npm script is this, "babel-node --presets env ./app.js --nodeEnv dev" this transpiles the code and starts the application

Eugene Tsakh Over a year ago

@KaanYalti then, for some reason, this module is not transpiled. Anyway I would not recommend using ES6 modules in node js for now.

Eugene Tsakh Over a year ago

@KaanYalti you are saying that the problem occurs when you try to execute migrations. How are you executing them?

Kaan Yalti Over a year ago

Thanks a lot, I already switched to common js in my config file. That resolved the issue

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