This article will make you clear how to fix the error: “To load an ES module, set “type” – ‘module'” in JS rapidly. We try to clarify the leading ways that can help you tackle this error in a natural and positive way. 

When will the error: “To load an ES module, set “type” – ‘module'” in JS happen?

This error can appear, and happen when you forget to set the ‘type’ property into ‘module’ in the ‘package.json’ file. 

At this moment, you run the code, and face the error: “To load an ES module, set “type” – ‘module'” in JS like below.

Warning: To load an ES module, set “type”: “module” in JS.

Here are the main causes that led to this error:

• Do not set the “type”: “module”.
• Package.json is not updated.

How to fix this error?

Solution 1: Add the “type”: ‘module’

The first step is setting up the newest version of Node.js. Next, you have to add the “type”: ‘module’ line in the ‘package.json’ file.

{
  "type": "module"
}

Run your program and check what happens. Now, this error is tackled successfully.

Solution 2: Update the ‘package.json’ file

Firstly, you should update the ‘package.json’ file like below.

"main": "index.js",
"type":"module",

Next, you import (isPrime) from ‘./isPrime.js’. 

import {isPrime} from './isPrime.js';

Then, isPrime.js will be like below:

export const isPrime ....

Until then, you solved this problem completely.

Solution 3: Rename your ‘app.js’ file to ‘app.mjs’

You have to change your ‘app.js’ file to ‘app.mjs’ if you do not want to add the “type”: “module” line in the ‘package.json’ file. From that, this error will be tackled quickly. 

Conclusion

That’s all about the error: “To load an ES module, set “type” – ‘module'” in JS and solutions that you need to read. Comment on this post if you have queries. 

Read more: 

→ Tips On Solving The Error “internal/modules/cjs/loader.js:582 throw err Error: Cannot find module”