Importing CSS from node_modules results in "undefined" class name in html

🐛 bug report

I could successfully import CSS/SCSS files into my React modules:

import * as styles from './my-component.css';
....
<div className= {`${styles.glory}`}>A text</div> // Which will be generated as <div class = "_glory_c5yp0">A text</div>

What I’m not able to do is to do the same for a CSS file in a node_modules package:

import * as styles from 'bootstrap/dist/css/bootstrap.css';
....
<div className= {`${styles.row}`}>A text</div> // Which will be generated as <div class = "undefined">A text</div>

🎛 Configuration (.babelrc, package.json, cli command)

.postcssrc

{
  "modules": true,
  "plugins": {
    "autoprefixer": {
      "grid": true,
    },
    "postcss-modules": {
      "camelCase": true
    }
  }
}

.babelrc

{
  "presets": [
    "@babel/preset-react",
    "@babel/preset-env",
    [
      "@emotion/babel-preset-css-prop",
      {
        "sourceMap": false
      }
    ]
  ],
  "plugins": [
    "@babel/plugin-proposal-class-properties",
    [
      "@babel/plugin-transform-runtime",
      {
        "regenerator": true
      }
    ]
  ]
}

Nothing fancy in package.json. Installed packages:

• parcel-plugin-typed-css-modules
• autoprefixer
• @types/autoprefixe
• postcss-modules

🤔 Expected Behavior

<div className= {`${styles.row}`}>A text</div>

should be generated to

<div class = "row">A text</div>`

😯 Current Behavior

<div className= {`${styles.row}`}>A text</div>

is generated to

<div class = "undefined">A text</div>`

No error is generated.

🔦 Context

I want to have type-check and intellisense for class names of the CSS stylesheets of installed npm packages like Bootstrap.

🌍 Your Environment

Software	Version(s)
Parcel	1.12.3
Node	10.16.3
npm/Yarn	6.6.0
Operating System	Windows 10

[DeMoorJasper]

It should be in node_modules/bootstrap as that is the node module you’re requiring. Hopefully this works, you will probably have to clear parcel cache as well as it didn’t have a config file before

[alexiwonder]

@DeMoorJasper Legend! Thanks so much 😊.