javascript - NodeJS "Must use import to load ES Module"

Question

I'm trying to import myArr from hello.js into index.js. However I get an error of

Error [ERR_REQUIRE_ESM]: Must use import to load ES Module

hello.js

export let myArr = ['hello', 'hi', 'hey'];

index.js

import { myArr } from './hello.js';
console.log(myArr);

Where am I going wrong?

Answer 1

I ran your code with no problem. Check for 2 things:

1. Node version >= 14. It only works with latest version of node.
2. Make sure your package.json includes a line for "type": "module", Without this line node assumes you want to use Common JS modules rather than ESM.