This is a Next.js v11 project bootstrapped with create-next-app. This is to demonstrate a build problem with the NIGHLY BUILD.

How this test was made

As of July 27 2021 using the latest release of Next JS (v11) I am undable to get React Spectrum running.

npx create-next-app --typescript

For comparison, cloned the React Spectrum Next JS sample

Added the Spectrum packages:

npm i @adobe/react-spectrum@nightly

We get endless warnings on dependency not being resolved

npm WARN Could not resolve dependency:
npm WARN peer @react-spectrum/provider@"^3.0.0-rc.1" from @react-spectrum/view@3.0.0-nightly.1157

So let's go for more…

npm i @spectrum-icons/illustrations@nightly
npm i @spectrum-icons/workflow@nightly 

Let's build

npm run build

All good.

Now import some items from React-spectrum to index.tsx

So here we have the first hurdle - the Global CSS cannot be imported from within node_modules.

error - ./node_modules/@adobe/react-spectrum/node_modules/@react-spectrum/provider/dist/main.css
Global CSS cannot be imported from within node_modules.

At this point the next.config.js only includes:

module.exports = { reactStrictMode: true, }

A custom NextJS config to the rescue?

Now we need the "next-transpile-modules"

npm install next-transpile-modules --save-dev

Note that in the sample code we had those with wildcards.

  '@adobe/react-spectrum',
  '@spectrum-icons/.*',
  '@react-spectrum/.*'

next-transpile-modules throws an error Error: Can't resolve '@spectrum-icons/.*' So I update the config transpile part to:

  '@adobe/react-spectrum',
  '@spectrum-icons',
  '@react-spectrum'

And still - an error - even with trailing slashes. Error: Can't resolve '@spectrum-icons' in '/Users/muri/LocalDev/rsp-next-ts'

AT THIS POINT I AM SURE THAT THERE IS AN ISSUE WITH 'next-transpile-modules'.

To move further I add the packages with their full paths.

  '@adobe/react-spectrum',
  '@spectrum-icons/workflow',
  '@react-spectrum/provider'

But now when running I get a SyntaxError for node_modules/@adobe/react-spectrum/node_modules/@react-spectrum/provider/dist/module.js

And this is where it gets tricky. Before one used to use the '@zeit/next-css/' to work around this but it's kind of obsolete.

But let's try.

npm i @zeit/next-css

Yay:

npm WARN deprecated @zeit/next-css@1.0.1: Next.js now has built-in support for CSS: https://nextjs.org/docs/basic-features/built-in-css-support. The built-in support solves many bugs and painpoints that the next-css plugin had.
npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated fsevents@1.2.13: fsevents 1 will break on node v14+ and could be using insecure binaries. Upgrade to fsevents 2.
npm WARN deprecated chokidar@2.1.8: Chokidar 2 will break on node v14+. Upgrade to chokidar 3 with 15x less dependencies.

Feeling like I still ..must... try.. So installing 'next-compose-plugins'

npm i next-compose-plugins --save-dev

And now the config looks like: ` const withPlugins = require('next-compose-plugins') const withCSS = require('@zeit/next-css') const withTM = require('next-transpile-modules')([ '@adobe/react-spectrum', '@spectrum-icons/workflow', '@react-spectrum/provider' ]);

module.exports = withPlugins([withCSS, withTM], { webpack5: false, // you want to keep using Webpack 4 }); `

Aaaand

We are stuck SyntaxError: Unexpected token '.'

So let's enable Webpack 5 then and run.

TypeError: Cannot set property 'styles' of undefined at module.exports (/Users/muri/LocalDev/rsp-next-ts/node_modules/@zeit/next-css/css-loader-config.js:25:56)

yay.

So let's disable the CSS thing then for fun.

module.exports = withPlugins([withTM]....

Back to some previous state where CSS isn't validated.

So reading this - I changed the config to reference every submodule adobe/react-spectrum#1156

And still when you visit the page, it just fails to compile

Failed to compile ./node_modules/@adobe/react-spectrum/node_modules/@react-spectrum/provider/dist/main.css Global CSS cannot be imported from within node_modules. Read more: https://nextjs.org/docs/messages/css-npm Location: node_modules/@adobe/react-spectrum/node_modules/@react-spectrum/provider/dist/module.js This error occurred during the build process and can only be dismissed by fixing the error.

The fix

Removing the nighly build of React Spectrum and reinstalling without defining a version.

Running it...

First, run the development server:

npm run dev
# or
yarn dev