Type module js ошибка - Исправление ошибок и поиск оптимальных решений проблем

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What is SyntaxError: cannot use import statement outside a module?
How to fix SyntaxError: cannot use import statement outside a module?
1. Solution 1 – Add “type”: “module” to package.json
2. Solution 2 – Add type=”module” attribute to the script tag
3. Solution 3 – Use import and require to load the modules
Configuration Issue in ORM’s
Conclusion

The Uncaught SyntaxError: cannot use import statement outside a module mainly occurs when developers use the import statement on the CommonJS instead of require statement.

What is SyntaxError: cannot use import statement outside a module?

There are several reasons behind this error. First, let us look at each scenario and solution with examples.

If you are using an older Node version < 13
If you are using a browser or interface that doesn’t support ES6
If you have missed the type=”module” while loading the script tag
If you missed out on the “type”: “module” inside the package.json while working on Node projects

Many interfaces till now do not understand ES6 Javascript features. Hence we need to compile ES6 to ES5 whenever we need to use that in the project.

The other possible reason is that you are using the file that is written in the ES6 module directly inside your code. It means you are loading the src file/directory instead of referring to the dist directory, which leads to a SyntaxError.

Usually, we use a bundled or dist file that is compiled to ES5/Javascript file and then import the modules in our code.

How to fix SyntaxError: cannot use import statement outside a module?

There are 3 ways to solve this error. Let us take a look at each of these solutions.

Solution 1 – Add “type”: “module” to package.json

If you are working on Node.js or react applications and using import statements instead of require to load the modules, then ensure your package.json has a property "type": "module" as shown below.

Adding “type”: “module” to package.json will tell Node you are using ES6 modules(es modules), which should get solve the error.

If you would like to use the ES6 module imports in Node.js, set the type property to the module in the package.json file.

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

If you are using TypeScript, we need to edit the tsconfig.json file and change the module property to “commonjs“, as shown below.

ts.config file

Change the ts.config file as shown below to resolve the Uncaught SyntaxError: cannot use import statement outside a module error.

    "target": "esnext",
    "module": "esnext",

    "target": "esnext",
    "module": "commonjs",

If this error mainly occurs in the TypeScript project, ensure that you are using a ts-node to transpile into Javascript before running the .ts file. Node.js can throw an error if you directly run the typescript file without transpiling.

Note: If your project does not have a package.json file, initialize it by using the npm init -y command in the root directory of your project.

Solution 2 – Add type=”module” attribute to the script tag

Another reason we get this error is if we are loading the script from the src directory instead of the built file inside the dist directory.

It can happen if the src file is written in ES6 and not compiled into an ES5 (standard js file). The dist files usually will have the bundled and compiled files, and hence it is recommended to use the dist folder instead of src.

We can solve this error by adding a simple attribute type="module" to the script, as shown below.

<script type="module" src="some_script.js"></script>

Solution 3 – Use import and require to load the modules

In some cases, we may have to use both import and require statements to load the module properly.

For Example –

    import { parse } from 'node-html-parser';
    parse = require('node-html-parser');

Note: When using modules, if you get ReferenceError: require is not defined, you’ll need to use the import syntax instead of require.

Configuration Issue in ORM’s

Another possible issue is when you are using ORM’s such as typeORM and the configuration you have set the entities to refer to the source folder instead of the dist folder.

The src folder would be of TypeScript file and referring the entities to .ts files will lead to cannot use import statement outside a module error.

Change the ormconfig.js to refer to dist files instead of src files as shown below.

 "entities": [
      "src/db/entity/**/*.ts", // Pay attention to "src" and "ts" (this is wrong)
   ],

  "entities": [
      "dist/db/entity/**/*.js", // Pay attention to "dist" and "js" (this is the correct way)
   ],

Conclusion

The Uncaught SyntaxError: cannot use import statement outside a module occurs if you have forgotten to add type="module" attribute while loading the script or if you are loading the src files instead of bundled files from the dist folder.

We can resolve the issue by setting the “type”: “module” inside the package.json while working on Node projects. If we are loading the Javascript file then we need to add the attribute type="module" to the script tag.

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Источник

Table of Contents
Hide

How to fix cannot use import statement outside a module error?
1. Solution 1 – Add “type”: “module” to package.json
2. Solution 2 – Add type=”module” attribute to the script tag
3. Solution 3 – Use import and require to load the modules

The Uncaught syntaxerror: cannot use import statement outside a module occurs if you have forgotten to add type="module" attribute while loading the script or if you are loading the src file instead of bundled file from the dist folder.

There are several reasons behind this error, and the solution depends on how we call the module or script tag. We will look at each of the scenarios and the solution with examples.

How to fix cannot use import statement outside a module error?

Solution 1 – Add “type”: “module” to package.json

If you are working on Node.js or react applications and using import statements instead of require to load the modules, then ensure your package.json has a property "type": "module" as shown below.

Adding “type”: “module” to package.json will tell Node you are using ES2015 modules(es modules), which should get solve the error.

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

If you are using TypeScript, we need to edit the tsconfig.json file and change the module property to “commonjs“, as shown below.

ts.config file

Change the ts.config file as shown below to resolve the Uncaught syntaxerror: cannot use import statement outside a module error.

    "target": "esnext",
    "module": "esnext",

    "target": "esnext",
    "module": "commonjs",

Solution 2 – Add type=”module” attribute to the script tag

Another reason we get this error is if we are loading the script from the src directory instead of the built file inside the dist directory.

It can happen if the src file is written in es6 and not compiled into a standard js file. The dist files usually will have the bundled and compiled JavaScript file, and hence it is recommended to use the dist folder instead of src.

We can solve this error by adding a simple attribute type="module" to the script, as shown below.

<script type="module" src="some_script.js"></script>

Solution 3 – Use import and require to load the modules

In some cases, we may have to use both import and require statements to load the module properly.

For Example –

    import { parse } from 'node-html-parser';
    parse = require('node-html-parser');

Note: When using modules, if you get ReferenceError: require is not defined, you’ll need to use the import syntax instead of require.

Avatar Of Srinivas Ramakrishna

Srinivas Ramakrishna is a Solution Architect and has 14+ Years of Experience in the Software Industry. He has published many articles on Medium, Hackernoon, dev.to and solved many problems in StackOverflow. He has core expertise in various technologies such as Microsoft .NET Core, Python, Node.JS, JavaScript, Cloud (Azure), RDBMS (MSSQL), React, Powershell, etc.

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I just started to learn React today.
How do I get rid of that error message on my Console in the Terminal in Visual Studio.

(node: 9374)Warning: To load an ES module,
 set "type": "module" in the package.json or use the .mjs extension. 
/Users/nishihaider/workspace-ui/react-todo-app/src/App.js:1

import React from "react";
import "./App.css";

function App() {
  <>
  return (
  <h1>ToDo</h1>
  );
  </>
}

export default App;

Liam

26.7k27 gold badges120 silver badges184 bronze badges

asked Aug 26, 2020 at 0:03

First, install the latest version of Node.js. It has the latest and greatest features.

Second, add the "type": "module" line in your package.json file.

{

  "type": "module"

}

Third, use the --experimental-modules flag when invoking nodejs:

node --experimental-modules app.js

You should be good to go!

An alternative is to avoid adding the «type»: «module» line in your package.json file and instead rename your app.js file to app.mjs.

Note that now the require() syntax will stop working.

answered Aug 26, 2020 at 3:05

Bijin AbrahamBijin Abraham

1,5912 gold badges10 silver badges25 bronze badges

Here is my approach:

1 — Update package.json like:

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

2 — use.js when importing, like:

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

3 — here is isPrime.js

export const isPrime ....

Penny Liu

13.8k5 gold badges74 silver badges91 bronze badges

answered Mar 17, 2021 at 19:58

You just need to update package.json like this,

{"type": "module"}

It’s worked for me,
Thanks!

answered Jun 8, 2021 at 3:13

to add Type: module in package.json — helps

package.json contain:

{
  "name": "react_template",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "type": "module",
  "scripts": {
    "test": "echo "Error: no test specified" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "webpack": "^5.30.0",
    "webpack-cli": "^4.6.0"
  }
}

answered Apr 7, 2021 at 11:01

LotpiteLotpite

1311 silver badge3 bronze badges

For those using TypeScript with node.js, and is trying to use the import statement. I have found that setting the module to value es2015 in the tsconfig.json gives this error, while setting it to commonjs works.

tsconfig.json

    {
     "module": "commonjs"
    }

answered Apr 21, 2022 at 1:47

JarrettJarrett

4484 silver badges13 bronze badges

Just Change this:

export default App;

To this:

module.exports = App;

Lee Taylor

7,65916 gold badges33 silver badges49 bronze badges

answered Jun 20, 2022 at 3:38

I have a parent file importing child components, so I get same problem about ES module.
in my case, I must define more details when i import the component. like this:

import db from "../config/Database"; false
import db from "../config/Database.js"; true

Another example :

import Users from "../models/UserModel"; incorrect
import Users from "../models/UserModel.js"; correct

I don’t know why it has to be like this, but when I try the problem is resolved. I hope this helps

answered Jun 27, 2022 at 19:05

SIMPLE AND FAST SOLUTION FOR BEGINNERS

1 RENAME YOUR JS FILE MJS LIKE (hello.js > hello.mjs)

2 GIVE MJS FILE NAME IN YOUR EXPORT LIKE ( import { first } from './pg.mjs')

answered Dec 19, 2022 at 13:32

you are also sorrounding the return statement with React Fragments which is not correct. Your return statement should look like the following:

 import React from "react";
 import "./App.css";

 function App() {
   return (
    <>
      <h1>ToDo</h1>
    </>
   );
 }

export default App;

I’m quite sure this was the source of your issues all along and not the module import/export issue.

answered Apr 27, 2021 at 15:29

adding the «type»: «module» line in your package.json file and instead rename your app.js file (or whatever) to app.mjs.

answered Mar 15, 2022 at 7:22

Источник

Are you getting the SyntaxError Cannot use import statement outside a module in JavaScript? In this article, I will discuss how to resolve this error in JavaScript.

You can receive this error for various reasons in JavaScript, it can be the Node.js or NPM that may cause the error. Or it may be the ECMAScript 6 that is not getting supported by the browser you are using.

You use the below methods discussed to get this error fixed that you are getting while you are trying to import a library in JavaScript.

Method 1: Using Module in Package.JSON file

The first method that you can use the get rid of this error is using the "type":"module" code in your package.json file present inside your project folder.

Filename: package.json
{
  //----
  "type": "module",
 //---
 //---
}

As you can see in the above code, I have used the import syntax function instead of require method that can usually cause the SyntaxError. Hence to remove this syntax error you need to import^[1] the module in the package JSON.

How To Fix Cannot use import statement outside a module JavaScript

Also, make sure that you do not run TypeScripts scripts present in your project independently as those scripts can also cause this error or you can go into an infinite loop instead.

Method 2: Adding Module to Script Tag

If you are still getting the error then you may try adding the type as a module in the script tag as well. Sometimes adding a module to a package JSON file may not work and it may work if you add it to an individual script tag that is throwing an error for you.

<script type="module" src="../src/main.js"></script>

Since type module specifies to JavaScript that you can import the module you want to use for this script tag and hence removes the chances of getting StandardError.

Method 3: Using Require Instead of Import

You can use the require method of JavaScript if none of the above methods are working for you. But you need to add it differently as mentioned below in the example code snippet.

//Suppose you want to import fetch from 'getFetch'
fetch = require('getFetch')

Note: Here inside the bracket after require you need to enter your library name and before equals what you want to import from that library.

Using the above code, I was able to fix my error for SyntaxError for importing the module. This usually works for Node.

Method 4: Enable EMCAScript 6 in NodeJs

Another method that can help you fix this SyntaxError is enabling the ECMAScript 6 in your project if it is already not enabled. To enable you to need to follow the below steps.

//Open the Terminal and Type and Press Enter
npm install --save esm

or

node -r esm server.js

Why SyntaxError: Cannot use import statement outside a module Occurs?

Numerous interfaces continue to be incompatible with the ES6 JavaScript syntax and functionality. As a result, if ES6 is used in a file or project, it must be built to ES5 first.

The SyntaxError: Cannot use import statement outside of a module error could occur if you attempt to execute the file independently. You have not yet installed and configured an ES6 compiler such as Babel, or the file path in your runscript is incorrect/is not the compiled file.

If you wish to proceed without using a compiler, the optimal way is to use ES5 syntax, which in this example would be var ms = require(./ms.js);. This can be updated later as necessary, or better yet, configure your compiler and ensure that your file/project is compiled prior to running. Additionally, ensure that your run script is running the compiled file, which is typically named dist, build, or whatever you named it and that the path to the compiled file in your runscript is correct.

Wrap Up

I hope you were able to fix the SyntaxError using the methods listed above. As to resolve this error I have listed around four methods that you can use to resolve this issue.

If you are still not able to resolve this issue then please let me know in the comment section. Also, let me know if you know a better method to resolve these issues other than the one discussed above I will be happy to add it here.

If you liked the above tutorial then please follow us on Facebook and Twitter. Let us know the questions and answer you want to cover in this blog.

Further Read:

How To Remove A Specific item From An Array
Best Udemy JavaScript Course 2021

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JavaScript programs started small by being used here and there. Over time, the usage of JavaScript increased and we’re writing full applications that run in the browser. These large applications can be hard to maintain. It makes sense to think about ways of splitting them up into modules.

Modern browsers ship with native module support allowing them to optimize which module must be loaded.

A common error with modules is the “Uncaught SyntaxError: Cannot use import statement outside a module”. This error means you must explicitly tell the environment that the loaded file is a module. Let’s have a look at how to do that in the browser and Node.js

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Split a String into a List of Words in JavaScript or Node.js
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Check If a String Is in Lowercase in JavaScript or Node.js
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How to Create a Directory (and Parents If Needed)
Get a File Name (With or Without Extension)

Get a File’s Created Date
Get a File’s Last Modified or Updated Date of a File
How to Create an Empty File
Check If a Path or File Exists
How to Rename a File
Check If a Path Is a Directory
Check If a Path Is a File
Retrieve the Path to the User’s Home Directory
How to Touch a File
Read File Content as String
Check If a Directory Is Empty
How to Create a Directory (and Parents If Needed)
Get a File‘s Extension
Get the Size of a File
Get a File Name (With or Without Extension)
Read a JSON File

Create From Object
Transform to an Object

Determine the Node.js Version Running Your Script

Determine the Node.js Version Running Your Script

Check if a Value is a Symbol in JavaScript or Node.js

Check if a Value is a Symbol in JavaScript or Node.js

Detect if Running on Linux
Detect if Running on macOS
Detect if Running on Windows
Check if Running on 64bit or 32bit Platform
Constant for Platform-Specific Newline

Detect if Running on Linux
Detect if Running on macOS
Detect if Running on Windows
Check if Running on 64bit or 32bit Platform
Constant for Platform-Specific Newline

How to Download a File

Retrieve the List of Supported Hash Algorithms

Calculate an MD5 Hash
Retrieve the List of Supported Hash Algorithms
Calculate a SHA256 Hash

Fix “Uncaught SyntaxError” in the Browser

Browsers support modules out of the box. But you must tell the browser that imports using a <script> tag should be handled as a module. For example, frontend tools like Vite create a modern output bundle using modules.

Fix the syntax error by adding type="module" to your script tags:

<script type="module" src="/assets/app.js"></script>

Fix “Uncaught SyntaxError” in Node.js

You must tell Node.js that you’re using modules when your code is using import or export keywords. Node.js in version 18.x uses CommonJS as the default, but CommonJS doesn’t support these keywords. You must run your app as a module. You can do that by setting the type: "module" of your app inside the package.json file:

package.json

{
  "type": "module"
}

This resolves the “Uncaught SyntaxError” in your Node.js application and you can write modern code using ECMAScript modules.

Enjoy!

Mentioned Resources

Browser module support guide on MDN
Vite website

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Marcus Pöhls

Marcus is a fullstack JS developer. He’s passionate about the hapi framework for Node.js and loves to build web apps and APIs. Creator of Futureflix and the “learn hapi” learning path.

Источник

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What is SyntaxError: cannot use import statement outside a module?

How to fix SyntaxError: cannot use import statement outside a module?

Solution 1 – Add “type”: “module” to package.json

Solution 2 – Add type=”module” attribute to the script tag

Solution 3 – Use import and require to load the modules

Configuration Issue in ORM’s

Conclusion

Related Tags

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Table of Contents Hide

How to fix cannot use import statement outside a module error?

Solution 1 – Add “type”: “module” to package.json

Solution 2 – Add type=”module” attribute to the script tag

Solution 3 – Use import and require to load the modules

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Method 1: Using Module in Package.JSON file

Method 2: Adding Module to Script Tag

Method 3: Using Require Instead of Import

Method 4: Enable EMCAScript 6 in NodeJs

Why SyntaxError: Cannot use import statement outside a module Occurs?

Wrap Up

Node.js Series Overview

Fix “Uncaught SyntaxError” in the Browser

Fix “Uncaught SyntaxError” in Node.js

Mentioned Resources

Get Notified on New Future Studio Content and Platform Updates

Marcus Pöhls

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