[Solved] "Uncaught SyntaxError: Cannot use import statement outside a module" when importing ECMAScript 6

Problem: 

I am new at nodejs. I was trying to learn something from a youtube tutorial. When I try to import an npm package, I got the following error: 

 "Uncaught SyntaxError: Cannot use import statement outside a module" 
when importing ECMAScript

this is my file: 

import { ms } from "./ms.js";
import Symbol from "./ms/symbol.js";
ms.Symbol = Symbol;
export { ms };

What is the right way to import a package? 

So in this article, we are going to solve your problem.

Solution: 

These are the three solutions you can do to solve your problem:

1. replace "import" and use "require" instead. 

const ms = require("ms"); 

2. If you are using script you can include type="module " to solve this: 

<script type="module" src="milsymbol-2.0.0/src/milsymbol.js"></script>

3. And the third solution is, add "type": "module" into your package.json file: 

{
     // ...
     "type": "module",
     // ...
}

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Hopes this solves the problem you are having. If you have any more question you can comment below.