How to import a Javascript file that is ESM from a CommonJS module? Got. Error: Not supported

Question

My project is written entirely in CommonJS module and I can't change it. I am trying to use a library which is an ESM. The library is Got library (https://github.com/sindresorhus/got).

This is my code

const request = require('request');
const Promise = require('bluebird');
// require('./wrapped-got');
var wrappedgot = null;

function HTTPRequestV2(hostURL, defaultOptions) {
    this.hostUrl = hostURL;
    this.requestWrapper = request.defaults(defaultOptions);
}


HTTPRequestV2.prototype.init = async function(){
    wrappedgot = await import('got');
    /*return import('got')
        .then(({default: theDefault}) => {
            wrappedgot= theDefault;
            console.log(theDefault);

        });
    console.log(wrappedgot);*/
};

But on running this I get error Not Supported on the wrappedgot = await import('got'); line

I tried using the work around of dynamic import function as suggested in their Issues page but its failing with above error https://github.com/sindresorhus/got/issues/1789

Even tried running their sample code but that is also failing with same error https://gist.github.com/szmarczak/0f2b70b2a1ed52a56a6d391ac02d094d

------Update-------

I am using Node Version 12.14.1, it supports async & await. I have read in SO where it has been used in Node Version 10

Using the dynamic import() function on Node.js

Got Library version is 13.0.0

Answer 1

Node.js 12.x does not support dynamic imports which were introduced with Node 13.2.0. Additionally, it has been over a year since security support for Node.js 12.x ended.

Upgrade to a current version of Node.Js.

Answer 2

I'm pretty sure imports have to be in the global scope and you're trying to use an import inside of a function. You will have to move that import outside of that function in order for the error to go away. As a solution to this, import 'got' at the top with those requires and assign it to a variable and then when the function HTTPRequestV2.prototype.init is run then you should set 'wrappedgot' to whatever variable holds the 'got' import. I hope this helps.

<------------------ General improvements to this code ------------------>

Also this is unrelated but you've named a variable at the top 'Promise' and that should really be avoided since a promise is a constructor function in JavaScript and is used for something else, by using it's name for something else it could result in actual promises to throw an error.

I would also suggest not using 'var' in this day and age since it's a legacy version of JavaScript and can result in unexpected bugs that you might not expect unless you know what you are doing.

I would also recommend on using import instead of require to stay up to date with the latest implementations.