Noop in environment without DOM api

[OlegWock]

Modification Proposal

Expected Behavior / Situation

When executed in environment without window or document (e.g. worker), style loader should not try to inject styles.

Actual Behavior / Situation

Fails with error while trying to access document.createElement

This was already discussed some time ago (#203), but I'm not sure if it was ever resolved. Please let me know if this is something you consider reasonable or if you think it's better to left it as is (raising exception)

I also made a ad-hoc fix for my project (forked this repo and tried to patch it diff), I'm not sure if it's sufficient and covers all cases (I use very basic configuration and patch works with it), but I'm willing to adjust it and make pull request if you find it useful

Please paste the results of npx webpack-cli info here, and mention other relevant information

❯ npx webpack-cli info

  System:
    OS: macOS 13.1
    CPU: (10) arm64 Apple M1 Max
    Memory: 15.86 GB / 64.00 GB
  Binaries:
    Node: 16.18.1 - ~/.nvm/versions/node/v16.18.1/bin/node
    Yarn: 1.22.19 - ~/.nvm/versions/node/v16.18.1/bin/yarn
    npm: 8.19.2 - ~/.nvm/versions/node/v16.18.1/bin/npm
  Browsers:
    Brave Browser: 109.1.47.186
    Chrome: 110.0.5481.177
    Firefox: 110.0
    Safari: 16.2
  Packages:
    babel-loader: ^8.2.5 => 8.2.5 
    clean-webpack-plugin: ^4.0.0 => 4.0.0 
    copy-webpack-plugin: ^11.0.0 => 11.0.0 
    css-loader: ^6.7.1 => 6.7.1 
    file-loader: ^6.2.0 => 6.2.0 
    filemanager-webpack-plugin: ^7.0.0 => 7.0.0 
    generate-file-webpack-plugin: ^1.0.1 => 1.0.1 
    moment-timezone-data-webpack-plugin: ^1.5.1 => 1.5.1 
    sass-loader: ^13.0.2 => 13.0.2 
    string-replace-loader: ^3.1.0 => 3.1.0 
    style-loader: git+https://github.com/OlegWock/style-loader => 3.3.1 
    terser-webpack-plugin: ^5.3.3 => 5.3.3 
    to-string-loader: ^1.2.0 => 1.2.0 
    ts-loader: ^9.4.2 => 9.4.2 
    webpack: ^5.75.0 => 5.75.0 
    webpack-bundle-analyzer: ^4.7.0 => 4.7.0 
    webpack-cli: ^5.0.1 => 5.0.1 

[alexander-akait]

Yeah, we should handle that case, do you want to send a PR? Sorry for delay