[ESM] Webpack 5 - NodeJs Server

[joacub]

Current behavior 😯

ESM are not usable in server side, after node 12 esm is enabled and when we want to use esm is imposible since the packages.json does not have type: module or the files are not properly named with .mjs ext.

when using import Accordion from '@mui/material/Accordion';

this throw an error since is getting the index.js in that folder instead the main in package wich is the commonjs file.

Expected behavior 🤔

expected imported either commonjs file correctly or mark the package.json with type: module as per nodes specs.

Steps to reproduce 🕹

Steps:

1. import any material module
2. mark you own package with type:module as well
3. execute node supporting modules

Context 🔦

Server Side

Your environment 🌎

`npx @mui/envinfo`

  System:
    OS: macOS 12.1
    CPU: (10) arm64 Apple M1 Max
    Memory: 2.95 GB / 64.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 17.0.1 - ~/.nvm/versions/node/v17.0.1/bin/node
    npm: 8.1.3 - ~/.nvm/versions/node/v17.0.1/bin/npm
  Managers:
    Homebrew: 3.3.3 - /opt/homebrew/bin/brew
    pip3: 21.2.4 - /opt/homebrew/bin/pip3
    RubyGems: 3.0.3.1 - /usr/bin/gem
  Utilities:
    Make: 3.81 - /usr/bin/make
    GCC: 4.2.1 - /usr/bin/gcc
    Git: 2.32.0 - /usr/bin/git
    Clang: 13.0.0 - /usr/bin/clang
    FFmpeg: 4.4.1 - /opt/homebrew/bin/ffmpeg
  Servers:
    Apache: 2.4.51 - /usr/sbin/apachectl
  Virtualization:
    Docker: 20.10.10 - /usr/local/bin/docker
  SDKs:
    iOS SDK:
      Platforms: DriverKit 21.2, iOS 15.2, macOS 12.1, tvOS 15.2, watchOS 8.3
  IDEs:
    Nano: 2.0.6 - /usr/bin/nano
    Vim: 8.2 - /usr/bin/vim
    Xcode: 13.2.1/13C100 - /usr/bin/xcodebuild
  Languages:
    Bash: 3.2.57 - /bin/bash
    Perl: 5.30.3 - /usr/bin/perl
    Python: 2.7.18 - /usr/bin/python
    Python3: 3.9.7 - /opt/homebrew/bin/python3
    Ruby: 2.6.8 - /usr/bin/ruby
  Databases:
    MySQL: 10.6.4 (MariaDB) - /opt/homebrew/bin/mysql
    SQLite: 3.36.0 - /usr/bin/sqlite3
  Browsers:
    Chrome: 96.0.4664.110
    Safari: 15.2

[siriwatknp]

There is an afford to support ESM. #30510

[joacub]

Nice, is there any deadline for this ?