javascript - How to import nodejs module "module" via es6 import to create "require" functio

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I am writing a JavaScript es6 module which contains "Mocha" test-cases which test a JavaScript es6 module containing the actual functionality of my app.

I am trying to import nodejs module "module" via es6 import like so:

import { createRequire } from 'module';

Next I create a "require" function by calling "createRequire":

const require = createRequire(import.meta.url);

Afterwards I try to use "require" to import nodejs modules:

const chai = require('chai');
const assert = chai.assert;

I put that all together in a HTML file, started a web-server and opened the HTML file in the browser.

Unfortunately, the first line gives me an error in the console of the Browser Firefox:

TypeError: Error resolving module specifier: module

The browser Chromium gives me the following error message:

Uncaught TypeError: Failed to resolve module specifier "module". Relative references must start with either "/", "./", or "../".

Actually, giving relative references is not working either:

I installed the nodejs module "module" (npm install module) and used a relative path to that module. Unfortunately, the browser does not know how to load the module because no concrete entrypoint is given.

I just tried stick to the manual but had no luck:

.html#modules_module_createrequire_filename

What do you think? How should I change my code so that this works?

Many thanks in advance for your valuable advice.

I am writing a JavaScript es6 module which contains "Mocha" test-cases which test a JavaScript es6 module containing the actual functionality of my app.

I am trying to import nodejs module "module" via es6 import like so:

import { createRequire } from 'module';

Next I create a "require" function by calling "createRequire":

const require = createRequire(import.meta.url);

Afterwards I try to use "require" to import nodejs modules:

const chai = require('chai');
const assert = chai.assert;

I put that all together in a HTML file, started a web-server and opened the HTML file in the browser.

Unfortunately, the first line gives me an error in the console of the Browser Firefox:

TypeError: Error resolving module specifier: module

The browser Chromium gives me the following error message:

Uncaught TypeError: Failed to resolve module specifier "module". Relative references must start with either "/", "./", or "../".

Actually, giving relative references is not working either:

I installed the nodejs module "module" (npm install module) and used a relative path to that module. Unfortunately, the browser does not know how to load the module because no concrete entrypoint is given.

I just tried stick to the manual but had no luck:

https://nodejs/api/modules.html#modules_module_createrequire_filename

What do you think? How should I change my code so that this works?

Many thanks in advance for your valuable advice.

• javascript
• node.js
• ecmascript-6

Share Improve this question Follow edited Dec 5, 2019 at 9:52 systembot asked Dec 5, 2019 at 9:29 systembotsystembot 9111 gold badge11 silver badge33 bronze badges

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2 Answers 2

Sorted by: Reset to default 4

I hope you've installed the module using 'npm install module' mand, try using monJS pattern and include the module in the following way

const { createRequire } = require('module');

require() is used to load files in node, and module is a node module.

These things don't exist in browsers.

You do these things, and running mocha tests in node. There should be no browser, just a mand line.

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