how to import constants from another file in node.js

user_15894598 0
Viewed 6785

Node.js v16.1.0

I am trying to import constants from another js file in the same directory. But i am not being able to do so.

constants.js

export const API_URL = 'http://localhost:8080';
export const MAX_THREADS = 8;

solution.js

/**
 * Import constants from the constants.js file
 * 
 * Each console.log should log a separate constant
 */

import { MAX_THREADS } from "./constants.js";
node.js
4 Answers

You should do something like the following.

constants.js

const API_URL = 'http://url.com'
const MAX_THREADS = 5

exports.API_URL = API_URL
exports.MAX_THREADS = MAX_THREADS

solution.js

const { API_URL, MAX_THREADS } = require('./constants');
user_11562330
user_158349390

Node.js >= v13

You only need to follow below step be able to use ECMAScript modules.

Add "type": "module" in your package.json.

{
  ...
  "type": "module"
}
user_104278070

If you rename your "solution.js" to solution.mjs, it will work.

The ".mjs" signals to node engine that you are using ES Module System.

Also, putting "type": "module" in packages.json will work as well.

user_150126390
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