What are the best practices for utilizing ESM only npm packages alongside traditional npm packages within a single JavaScript file?

Hey there, I'm fairly new to web development and I encountered a problem when trying to require two packages, franc and langs, in my index.js file. It turns out that franc is now an ESM only package, requiring me to import it and mention type:module in my package.json file. However, this leads to an issue where I cannot properly require the langs package. When attempting to import it, it returns a promise and trying to access langs' functions results in an error saying it is not a function. Here's an example:

import {franc} from 'franc'
const langs = import('langs');
const langCode = franc('Alle menslike wesens word vry')
console.log(langCode)
console.log(langs.where("3", "kor"));

I'm receiving an error stating that langs.where is not a function. Any assistance would be greatly appreciated.

Additionally, here is the output when writing code that results in a promise being returned:

import {franc} from 'franc'
const langs = import('langs');
const langCode = franc('Alle menslike wesens word vry')
console.log(langCode)
setTimeout(function(data){
    console.log(langs)
}, 1000)

Output

afr
Promise {
  [Module: null prototype] {
    default: {
      all: [Function: allLanguages],
      has: [Function: hasLanguage],
      codes: [Function: getCodes],
      names: [Function: getNames],
      where: [Function: findBy]
    }
  }
}

Answer №1

For a successful library import, you have the option to follow any of these methods:

import {franc} from 'franc'
import langs from 'langs'
const langCode = franc('Alle menslike wesens word vry')
console.log(langCode)
console.log(langs.where("3", "kor"));
import {franc} from 'franc'
const langs = require('langs');
const langCode = franc('Alle menslike wesens word vry')
console.log(langCode)
console.log(langs.where("3", "kor"));
import {franc} from 'franc'
const langsModule = await import('langs');
let langs = langsModule.default;
const langCode = franc('Alle menslike wesens word vry')
console.log(langCode)
console.log(langs.where("3", "kor"));

While I personally recommend the first approach, all three methods should technically work. For more insights on the import statement, refer to the MDN Web Docs.

Now, let's delve into the distinctions among these options:

  • The first method leverages ES6 module functionality to import the default export of the langs package.
  • The second method mirrors the first but makes use of the dynamic import feature in ES6 modules. This entails waiting for the file to load and choosing the default property, enabling asynchronous loading.
  • The third method employs CommonJS for dependency loading. It only permits importing the default export, necessitating the entire file to load synchronously, thereby impacting performance.

This insightful Stack Overflow post sheds light on the disparities between the ES6 and CommonJS approaches.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Using jQuery to incorporate a variable into JSON schema markup

For my current project, I am attempting to extract the meta description and incorporate it into JSON schema markup. However, I am facing difficulty in passing the variable properly into the JSON structure. My initial approach was as follows: <script&g ...

The mysterious case of jQuery DOM alterations vanishing from sight in the view

I have a quick inquiry. I've been exploring jQuery lately and discovered the ability to dynamically add HTML elements to the DOM using code like $('').append('<p>Test</p>'); However, what surprised me is that these ap ...

Angular does not seem to be triggering $watch for changes in arrays

Trying to activate a $watch function after a delay in Angular: Controller Information .controller('MyCtrl', ['$scope', function ($scope) { $scope.chickens = ["Jim", "Joe", "Fred"]; $scope.chickens.push("Steve"); setTimeou ...

How to resolve a TypeError saying "Object(...) is not a function"?

I've been attempting to display material-ui tabs as a component on another page, but I'm encountering an error that causes the code to break when loading the page with this component. I've tried two different methods of rendering this compo ...

NPM: Handling multiple prehooks with the same name

Is it possible to have multiple prehooks with the same name in my package.json file? For example, having two instances of pretest: "scripts": { "start": "react-scripts start", ... "pretest": "eslin ...

Which specific html container or element can be found on the mymsn pages?

When accessing mymsn, users have the ability to personalize the content and layout of their webpage. I am curious about what type of container is being utilized for this customization - does it involve an html element, or perhaps javascript, or something e ...

Tips on activating the CSS style while typing using the onChange event in React

Is it possible to dynamically adjust the width of an input as we type in React? Currently, my input has a default width of 1ch. I would like it to increase or decrease based on the number of characters entered, so that the percentage sign stays at the end ...

Utilizing Conditional Styling for an Array of Objects within a Textarea in Angular 6

My array contains objects structured as follows: list =[ { name:"name1", value:true } { name:"name2", value:false } { name:"name3", value:true } { name:"name4", value:false ...

Organizing seating arrangements for a concert hall performance

My goal is to develop a custom concert seat booking system using HTML, CSS, and JavaScript. For example, if the concert venue has 10 rows with 20 seats in each row, I could organize them like this: const rows = [ { name: 'A', seats: [1, 2, 3, ...

Observable in RxJS with a dynamic interval

Trying to figure out how to dynamically change the interval of an observable that is supposed to perform an action every X seconds has been quite challenging. It seems that Observables cannot be redefined once they are set, so simply trying to redefine the ...

Why am I encountering difficulties running my Next.js project?

I have cloned projects that are 5 months old from GitHub and I am currently using Node.js version 18 or higher. Here is what I have tried: npx install cross-env //Tried installing and adding the following code to package.json "dev": "cross-env NODE_OPTI ...

ES6 Generators: lack of informative stack trace when using iterator.throw(err)

The ES6 approach: iterator.throw(err) is often explained as inserting an exception as if it happened at the yield statement within the generator. The challenge lies in the fact that the stack trace of this exception does not include any information about t ...

Utilizing NextJS App in a Docker Container with Production Environment Variables

Everything runs smoothly when testing and using my NextJS Application with .env.local. However, the issue arises during a production build for deployment as it fails to locate the .env.production values, even though they are an exact replica of .env.local ...

Tips for executing a Python function from JavaScript, receiving input from an HTML text box

Currently, I am facing an issue with passing input from an HTML text box to a JavaScript variable. Once the input is stored in the JavaScript variable, it needs to be passed to a Python function for execution. Can someone provide assistance with this pro ...

Experiencing memory issues while attempting to slice an extensive buffer in Node.js

Seeking a solution for efficiently processing a very large base64 encoded string by reading it into a byte (Uint8) array, splitting the array into chunks of a specified size, and then encoding those chunks separately. The current function in use works but ...

What is the best practice for using templates in a constructor versus connectedCallback?

Should I apply template in the constructor or connectedCallback of a custom element? In my experience, when I apply it in connectedCallback, sometimes attributeChangedCallback is called before and I can't query for elements. export class TestElement ...

A step-by-step guide on displaying content according to a template file in AngularJS

I am new to using angular js and need help with displaying specific content on a particular page of my web application. I have a HTML template (showContent.html) that generates all pages, but I only want to show certain content on the URL http://localhost/ ...

Loading images dynamically in ReactJS allows for a seamless and customized user experience

I've been trying to dynamically fetch images from my images folder based on data retrieved from the database. Despite searching through numerous resources, I'm still struggling to crack this issue. Check out my code snippet below: import sword fr ...

Assign a value to an Html.HiddenField without tying it to the model upon form submission

I have two classes, SubsidiaryClient and Client, that are related in a one-to-many manner as depicted below. Currently, I am utilizing MVC 5 for development. In the Create SubsidiaryClient page, to retrieve the ClientID, you need to click on the browse bu ...

Struggling with Running the Webpack serve Command

Struggling to set up a React app using Webpack and Babel. After following various tutorials on YouTube and other websites, I keep encountering the same error whenever I run the webpack serve command, even if my index.js file is empty. [ERROR]: ERROR in .. ...