How to support es modules and commonjs modules at the same time

Some packages we install from npm support both commonjs and es modules,

These packages can be imported as follows:

import express from 'express'
// or
const express = require('express')

I have created a package which I already published to npm using es modules.

and I since my another project which I'm working on is built with commonjs, I realized that I can not require it using the following syntax:

const stackPlayer = require('stack-player')

How can I support the two module systems in my package stack-player so that everyone around the world can use it?

• Is there another method other than converting all of my project to es modules (which would be too complex since the project is 1 year old and is big enough to refuse the idea). ?

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