[remix] Buffer is not defined

[matrixersp]

Duplicates

• I have searched the existing issues

Latest version

• I have tested the latest version

Steps to reproduce 🕹

Link to live example:

Steps:

1. Create a new Remix project using npx create-remix@latest
2. Add the necessary MUI (following the remix example) and Cloudflare dependencies and configurations
3. run the app npm run dev

repository: https://github.com/matrixersp/remix-with-mui

Current behavior 😯

I get the following error:

service core:user:worker: Uncaught ReferenceError: Buffer is not defined
  at regd1tya9jj.js:21735:58 in node_modules/html-tokenize/node_modules/buffer-from/index.js
  at regd1tya9jj.js:82:50
  at regd1tya9jj.js:23774:22 in node_modules/html-tokenize/index.js
  at regd1tya9jj.js:25708:49 in node_modules/@emotion/server/create-instance/dist/emotion-server-create-instance.cjs.dev.js
  at regd1tya9jj.js:82:50
  at regd1tya9jj.js:25810:22 in node_modules/@emotion/server/create-instance/dist/emotion-server-create-instance.cjs.js

  at regd1tya9jj.js:82:50

✘ [ERROR] MiniflareCoreError [ERR_RUNTIME_FAILURE]: The Workers runtime failed to start. There is likely additional logging output above.

Expected behavior 🤔

The app should run successfully.

Context 🔦

Trying to add MUI to a Remix app that runs on Cloudflare

Your environment 🌎

npx @mui/envinfo

System:
    OS: Linux 6.4 Fedora Linux 38 (Workstation Edition)
  Binaries:
    Node: 18.14.2 - ~/.nvm/versions/node/v18.14.2/bin/node
    Yarn: 1.22.19 - ~/.yarn/bin/yarn
    npm: 9.8.0 - ~/.nvm/versions/node/v18.14.2/bin/npm
  Browsers:
    Chrome: 116.0.5845.96
  npmPackages:
    @emotion/react: ^11.11.1 => 11.11.1 
    @emotion/styled: ^11.11.0 => 11.11.0 
    @mui/base:  5.0.0-beta.11 
    @mui/core-downloads-tracker:  5.14.5 
    @mui/material: ^5.14.5 => 5.14.5 
    @mui/private-theming:  5.14.5 
    @mui/styled-engine:  5.13.2 
    @mui/system:  5.14.5 
    @mui/types:  7.2.4 
    @mui/utils:  5.14.5 
    @types/react: ^18.0.35 => 18.2.20 
    react: ^18.2.0 => 18.2.0 
    react-dom: ^18.2.0 => 18.2.0 
    typescript: ^5.0.4 => 5.1.6 

[mj12albert]

Depends on emotion: emotion-js/emotion#3102