.editorconfig

@@ -0,0 +1,12 @@
+# editorconfig.org
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false

.eslintignore

@@ -0,0 +1,4 @@
+/coverage
+/dist
+/node_modules
+/test/fixtures

.eslintrc.js

@@ -0,0 +1,29 @@
+module.exports = {
+  root: true,
+  extends: ['@webpack-contrib/eslint-config-webpack', 'prettier'],
+  overrides: [
+    {
+      files: ['src/runtime/**/*.js'],
+      env: {
+        browser: true,
+        node: true,
+      },
+      globals: {
+        __webpack_nonce__: 'readonly',
+      },
+      rules: {
+        'no-underscore-dangle': 'off',
+        'no-plusplus': 'off',
+        'consistent-return': 'off',
+        'no-param-reassign': 'off',
+        camelcase: [
+          'error',
+          { properties: 'never', allow: ['__webpack_nonce__'] },
+        ],
+        // avoid unnecessary `babel` helpers
+        'prefer-destructuring': 'off',
+        'prefer-rest-params': 'off',
+      },
+    },
+  ],
+};

.gitattributes

@@ -1,2 +1,5 @@
 # Treats the lock file as binary & prevents conflict hell
-yarn.lock -diff
+yarn.lock -diff
+* text=auto
+package-lock.json -diff
+bin/* eol=lf

.github/CODEOWNERS

@@ -0,0 +1,6 @@
+# These are the default owners for everything in
+# webpack-contrib
+@webpack-contrib/org-maintainers
+
+# Add repository specific users / groups
+# below here for libs that are not maintained by the org.

.github/CONTRIBUTING.md

@@ -0,0 +1,160 @@
+# Contributing in @webpack-contrib
+
+We'd always love contributions to further improve the webpack / webpack-contrib ecosystem!
+Here are the guidelines we'd like you to follow:
+
+- [Questions and Problems](#question)
+- [Issues and Bugs](#issue)
+- [Feature Requests](#feature)
+- [Pull Request Submission Guidelines](#submit-pr)
+- [Commit Message Conventions](#commit)
+
+## <a name="question"></a> Got a Question or Problem?
+
+Please submit support requests and questions to StackOverflow using the tag [[webpack]](http://stackoverflow.com/tags/webpack).
+StackOverflow is better suited for this kind of support though you may also inquire in [Webpack Gitter](https://gitter.im/webpack/webpack).
+The issue tracker is for bug reports and feature discussions.
+
+## <a name="issue"></a> Found an Issue or Bug?
+
+Before you submit an issue, please search the issue tracker, maybe an issue for your problem already exists and the discussion might inform you of workarounds readily available.
+
+We want to fix all the issues as soon as possible, but before fixing a bug we need to reproduce and confirm it. In order to reproduce bugs, we ask that you to provide a minimal reproduction scenario (github repo or failing test case). Having a live, reproducible scenario gives us a wealth of important information without going back & forth to you with additional questions like:
+
+- version of Webpack used
+- version of the loader / plugin you are creating a bug report for
+- the use-case that fails
+
+A minimal reproduce scenario allows us to quickly confirm a bug (or point out config problems) as well as confirm that we are fixing the right problem.
+
+We will be insisting on a minimal reproduce scenario in order to save maintainers time and ultimately be able to fix more bugs. We understand that sometimes it might be hard to extract essentials bits of code from a larger code-base but we really need to isolate the problem before we can fix it.
+
+Unfortunately, we are not able to investigate / fix bugs without a minimal reproduction, so if we don't hear back from you we are going to close an issue that doesn't have enough info to be reproduced.
+
+## <a name="feature"></a> Feature Requests?
+
+You can _request_ a new feature by creating an issue on Github.
+
+If you would like to _implement_ a new feature, please submit an issue with a proposal for your work `first`, to be sure that particular makes sense for the project.
+
+## <a name="submit-pr"></a> Pull Request Submission Guidelines
+
+Before you submit your Pull Request (PR) consider the following guidelines:
+
+- Search Github for an open or closed PR that relates to your submission. You don't want to duplicate effort.
+- Commit your changes using a descriptive commit message that follows our [commit message conventions](#commit). Adherence to these conventions is necessary because release notes are automatically generated from these messages.
+- Fill out our `Pull Request Template`. Your pull request will not be considered if it is ignored.
+- Please sign the `Contributor License Agreement (CLA)` when a pull request is opened. We cannot accept your pull request without this. Make sure you sign with the primary email address associated with your local / github account.
+
+## <a name="commit"></a> Webpack Contrib Commit Conventions
+
+Each commit message consists of a **header**, a **body** and a **footer**. The header has a special
+format that includes a **type**, a **scope** and a **subject**:
+
+```
+<type>(<scope>): <subject>
+<BLANK LINE>
+<body>
+<BLANK LINE>
+<footer>
+```
+
+The **header** is mandatory and the **scope** of the header is optional.
+
+Any line of the commit message cannot be longer 100 characters! This allows the message to be easier
+to read on GitHub as well as in various git tools.
+
+The footer should contain a [closing reference to an issue](https://help.github.com/articles/closing-issues-via-commit-messages/) if any.
+
+Examples:
+
+```
+docs(readme): update install instructions
+```
+
+```
+fix: refer to the `entrypoint` instead of the first `module`
+```
+
+### Revert
+
+If the commit reverts a previous commit, it should begin with `revert:`, followed by the header of the reverted commit.
+In the body it should say: `This reverts commit <hash>.`, where the hash is the SHA of the commit being reverted.
+
+### Type
+
+Must be one of the following:
+
+- **build**: Changes that affect the build system or external dependencies (example scopes: babel, npm)
+- **chore**: Changes that fall outside of build / docs that do not effect source code (example scopes: package, defaults)
+- **ci**: Changes to our CI configuration files and scripts (example scopes: circleci, travis)
+- **docs**: Documentation only changes (example scopes: readme, changelog)
+- **feat**: A new feature
+- **fix**: A bug fix
+- **perf**: A code change that improves performance
+- **refactor**: A code change that neither fixes a bug nor adds a feature
+- **revert**: Used when reverting a committed change
+- **style**: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons)
+- **test**: Addition of or updates to Jest tests
+
+### Scope
+
+The scope is subjective & depends on the `type` see above. A good example would be a change to a particular class / module.
+
+### Subject
+
+The subject contains a succinct description of the change:
+
+- use the imperative, present tense: "change" not "changed" nor "changes"
+- don't capitalize the first letter
+- no dot (.) at the end
+
+### Body
+
+Just as in the **subject**, use the imperative, present tense: "change" not "changed" nor "changes".
+The body should include the motivation for the change and contrast this with previous behavior.
+
+### Footer
+
+The footer should contain any information about **Breaking Changes** and is also the place to
+reference GitHub issues that this commit **Closes**.
+
+**Breaking Changes** should start with the word `BREAKING CHANGE:` with a space or two newlines. The rest of the commit message is then used for this.
+
+Example
+
+```
+BREAKING CHANGE: Updates to `Chunk.mapModules`.
+
+This release is not backwards compatible with `Webpack 2.x` due to breaking changes in webpack/webpack#4764
+Migration: see webpack/webpack#5225
+
+```
+
+## Testing Your Pull Request
+
+You may have the need to test your changes in a real-world project or dependent
+module. Thankfully, Github provides a means to do this. Add a dependency to the
+`package.json` for such a project as follows:
+
+```json
+{
+  "devDependencies": {
+    "style-loader": "webpack-contrib/style-loader#{id}/head"
+  }
+}
+```
+
+Where `{id}` is the # ID of your Pull Request.
+
+## Contributor License Agreement
+
+When submitting your contribution, a CLA (Contributor License Agreement) bot will come by to verify that you signed the [CLA](https://cla.js.foundation/webpack-contrib/style-loader).
+If it is your first time, it will link you to the right place to sign it.
+However, if you have committed your contributions using an email that is not the same as your email used on GitHub, the CLA bot can't accept your contribution.
+
+Run `git config user.email` to see your Git email, and verify it with [your GitHub email](https://github.com/settings/emails).
+
+## Thanks
+
+For your interest, time, understanding, and for following this simple guide.

.github/FUNDING.yml

@@ -0,0 +1 @@
+open_collective: webpack

.github/ISSUE_TEMPLATE.md

@@ -1,15 +1,16 @@
-<!-- Before creating an issue please make sure you are using the latest version of style-loader. -->
+<!--
+  👉🏽 Need support, advice, or help? Don't open an issue!
+  Head to StackOverflow or https://gitter.im/webpack/webpack.
 
-**Do you want to request a *feature* or report a *bug*?**
-<!-- Please ask questions on StackOverflow or the webpack Gitter (https://gitter.im/webpack/webpack). Questions will be closed. -->
+  Hey there!
 
-**What is the current behavior?**
+  You arrived at this template because you felt none of the other options
+  matched the kind of issue you'd like to report. Please use this opportunity to
+  tell us about your particular type of issue so we can try to accomodate
+  similar issues in the future.
 
-**If the current behavior is a bug, please provide the steps to reproduce.**
-<!-- A great way to do this is to provide your configuration via a GitHub gist. -->
-
-**What is the expected behavior?**
-
-**If this is a feature request, what is motivation or use case for changing the behavior?**
-
-**Please mention other relevant information such as your webpack version, Node.js version and Operating System.**
+  PLEASE do note, if you're using this to report an issue already covered by the
+  existing template types, your issue may be closed as invalid. Our issue
+  templates contain fields that help us help you, and without that important
+  info, we might as well be ice-skating uphill, carrying a wooly mammoth.
+-->

.github/ISSUE_TEMPLATE/BUG.md

@@ -0,0 +1,50 @@
+---
+name: 🐛 Bug Report
+about: Something went awry and you'd like to tell us about it.
+---
+
+<!--
+  Issues are so 🔥
+
+  If you remove or skip this template, you'll make the 🐼 sad and the mighty god
+  of Github will appear and pile-drive the close button from a great height
+  while making animal noises.
+
+  👉🏽 Need support, advice, or help? Don't open an issue!
+  Head to StackOverflow or https://gitter.im/webpack/webpack.
+-->
+
+- Operating System:
+- Node Version:
+- NPM Version:
+- webpack Version:
+- style-loader Version:
+
+### Expected Behavior
+
+<!-- Remove this section if not reporting a bug or modification request. -->
+
+### Actual Behavior
+
+<!-- Remove this section if not reporting a bug or modification request. -->
+
+### Code
+
+```js
+// webpack.config.js
+// If your code blocks are over 20 lines, please paste a link to a gist
+// (https://gist.github.com).
+```
+
+```js
+// additional code, HEY YO remove this block if you don't need it
+```
+
+### How Do We Reproduce?
+
+<!--
+  Remove this section if not reporting a bug.
+
+  If your webpack config is over 50 lines long, please provide a URL to a repo
+  for your beefy 🍖 app that we can use to reproduce.
+-->

.github/ISSUE_TEMPLATE/DOCS.md

@@ -0,0 +1,28 @@
+---
+name: 📚 Documentation
+about: Are the docs lacking or missing something? Do they need some new 🔥 hotness? Tell us here.
+---
+
+<!--
+  Issues are so 🔥
+
+  If you remove or skip this template, you'll make the 🐼 sad and the mighty god
+  of Github will appear and pile-drive the close button from a great height
+  while making animal noises.
+
+  👉🏽 Need support, advice, or help? Don't open an issue!
+  Head to StackOverflow or https://gitter.im/webpack/webpack.
+-->
+
+Documentation Is:
+
+<!-- Please place an x (no spaces!) in all [ ] that apply -->
+
+- [ ] Missing
+- [ ] Needed
+- [ ] Confusing
+- [ ] Not Sure?
+
+### Please Explain in Detail...
+
+### Your Proposal for Changes

.github/ISSUE_TEMPLATE/FEATURE.md

@@ -0,0 +1,25 @@
+---
+name: ✨ Feature Request
+about: Suggest an idea for this project
+---
+
+<!--
+  Issues are so 🔥
+
+  If you remove or skip this template, you'll make the 🐼 sad and the mighty god
+  of Github will appear and pile-drive the close button from a great height
+  while making animal noises.
+
+  👉🏽 Need support, advice, or help? Don't open an issue!
+  Head to StackOverflow or https://gitter.im/webpack/webpack.
+-->
+
+- Operating System:
+- Node Version:
+- NPM Version:
+- webpack Version:
+- style-loader Version:
+
+### Feature Proposal
+
+### Feature Use Case

.github/ISSUE_TEMPLATE/MODIFICATION.md

@@ -0,0 +1,27 @@
+---
+name: 🔧 Modification Request
+about: Would you like something work differently? Have an alternative approach? This is the template for you.
+---
+
+<!--
+  Issues are so 🔥
+
+  If you remove or skip this template, you'll make the 🐼 sad and the mighty god
+  of Github will appear and pile-drive the close button from a great height
+  while making animal noises.
+
+  👉🏽 Need support, advice, or help? Don't open an issue!
+  Head to StackOverflow or https://gitter.im/webpack/webpack.
+-->
+
+- Operating System:
+- Node Version:
+- NPM Version:
+- webpack Version:
+- style-loader Version:
+
+### Expected Behavior / Situation
+
+### Actual Behavior / Situation
+
+### Modification Proposal

.github/ISSUE_TEMPLATE/SUPPORT.md

@@ -0,0 +1,8 @@
+---
+name: 🆘 Support, Help, and Advice
+about: 👉🏽 Need support, help, or advice? Don't open an issue! Head to StackOverflow or https://gitter.im/webpack/webpack.
+---
+
+Hey there! If you need support, help, or advice then this is not the place to ask.
+Please visit [StackOverflow](https://stackoverflow.com/questions/tagged/webpack)
+or [the Webpack Gitter](https://gitter.im/webpack/webpack) instead.

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,18 +1,35 @@
-<!-- Thanks for submitting a pull request! Please provide enough information so that others can review your pull request. -->
+<!--
+  HOLY CRAP a Pull Request. We ❤️ those!
 
-**What kind of change does this PR introduce?**
-<!-- E.g. a bugfix, feature, refactoring, build related change, etc… -->
+  If you remove or skip this template, you'll make the 🐼 sad and the mighty god
+  of Github will appear and pile-drive the close button from a great height
+  while making animal noises.
 
-**Did you add tests for your changes?**
+  Please place an x (no spaces!) in all [ ] that apply
+-->
 
-**If relevant, did you update the README?**
+This PR contains a:
 
-**Summary**
+- [ ] **bugfix**
+- [ ] new **feature**
+- [ ] **code refactor**
+- [ ] **test update** <!-- if bug or feature is checked, this should be too -->
+- [ ] **typo fix**
+- [ ] **metadata update**
 
-<!-- Explain the **motivation** for making this change. What existing problem does the pull request solve? -->
-<!-- Try to link to an open issue for more information. -->
+### Motivation / Use-Case
 
-**Does this PR introduce a breaking change?**
-<!-- If this PR introduces a breaking change, please describe the impact and a migration path for existing applications. -->
+<!--
+  Please explain the motivation or use-case for your change.
+  What existing problem does the PR solve?
+  If this PR addresses an issue, please link to the issue.
+-->
 
-**Other information**
+### Breaking Changes
+
+<!--
+  If this PR introduces a breaking change, please describe the impact and a
+  migration path for existing applications.
+-->
+
+### Additional Info

.github/workflows/nodejs.yml

@@ -0,0 +1,91 @@
+name: style-loader
+
+on:
+  push:
+    branches:
+      - master
+      - next
+  pull_request:
+    branches:
+      - master
+      - next
+
+jobs:
+  lint:
+    name: Lint - ${{ matrix.os }} - Node v${{ matrix.node-version }}
+
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        node-version: [12.x]
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Use Node.js ${{ env.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ env.node-version }}
+
+      - name: Use latest NPM
+        run: sudo npm i -g npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      # - name: Security audit
+      # run: npm run security
+
+      - name: Check commit message
+        uses: wagoid/commitlint-github-action@v1
+
+  test:
+    name: Test - ${{ matrix.os }} - Node v${{ matrix.node-version }}, Webpack ${{ matrix.webpack-version }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: [8.x, 10.x, 12.x, 13.x]
+        webpack-version: [latest, next]
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Use latest NPM on ubuntu/macos
+        if: matrix.os == 'ubuntu-latest' || matrix.os == 'macos-latest'
+        run: sudo npm i -g npm
+
+      - name: Use latest NPM on windows
+        if: matrix.os == 'windows-latest'
+        run: npm i -g npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Install webpack ${{ matrix.webpack-version }}
+        run: npm i webpack@${{ matrix.webpack-version }}
+
+      - name: Run tests for webpack version ${{ matrix.webpack-version }}
+        run: npm run test:coverage -- --ci
+
+      - name: Submit coverage data to codecov
+        uses: codecov/codecov-action@v1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}

.gitignore

@@ -1,2 +1,17 @@
 /node_modules
 .idea/
+/coverage
+logs
+*.log
+npm-debug.log*
+.eslintcache
+/dist
+/local
+/reports
+.DS_Store
+Thumbs.db
+.idea
+*.iml
+.vscode
+*.sublime-project
+*.sublime-workspace

.prettierignore

@@ -0,0 +1,5 @@
+/coverage
+/dist
+/node_modules
+/test/fixtures
+CHANGELOG.md

.prettierrc.js

@@ -0,0 +1 @@
+module.exports = { singleQuote: true };

CHANGELOG.md

@@ -1,7 +1,221 @@
-# Change Log
+# Changelog
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+### [1.1.4](https://github.com/webpack-contrib/style-loader/compare/v1.1.3...v1.1.4) (2020-04-15)
+
+
+# Chore
+
+* update deps
+
+
+### [1.1.3](https://github.com/webpack-contrib/style-loader/compare/v1.1.2...v1.1.3) (2020-01-17)
+
+
+### Bug Fixes
+
+* injection algorithm ([#456](https://github.com/webpack-contrib/style-loader/issues/456)) ([236b243](https://github.com/webpack-contrib/style-loader/commit/236b2436fb0003eeba5f0aa33e7caf9f35d4fc7a))
+
+### [1.1.2](https://github.com/webpack-contrib/style-loader/compare/v1.1.1...v1.1.2) (2019-12-25)
+
+
+### Bug Fixes
+
+* algorithm for importing modules ([#449](https://github.com/webpack-contrib/style-loader/issues/449)) ([91ceaf2](https://github.com/webpack-contrib/style-loader/commit/91ceaf2b7e03f065d2a8cace1b733777848d4e86))
+* checking that the list of modules is an array ([#448](https://github.com/webpack-contrib/style-loader/issues/448)) ([1138ed7](https://github.com/webpack-contrib/style-loader/commit/1138ed7e04848b570a70e493b410902cfc4a9076))
+
+### [1.1.1](https://github.com/webpack-contrib/style-loader/compare/v1.1.0...v1.1.1) (2019-12-20)
+
+
+### Bug Fixes
+
+* add empty default export for `linkTag` value ([7ee8b04](https://github.com/webpack-contrib/style-loader/commit/7ee8b04fd519847cef93052c31efa0d0012ed54e))
+
+## [1.1.0](https://github.com/webpack-contrib/style-loader/compare/v1.0.2...v1.1.0) (2019-12-20)
+
+
+### Features
+
+* `esModule` option ([#441](https://github.com/webpack-contrib/style-loader/issues/441)) ([3415266](https://github.com/webpack-contrib/style-loader/commit/3415266f58f2be00bec1d66ae9e658437e0d0a6c))
+
+
+### Bug Fixes
+
+* order of imported styles ([#443](https://github.com/webpack-contrib/style-loader/issues/443)) ([c7d6e3a](https://github.com/webpack-contrib/style-loader/commit/c7d6e3a3fba63a76e8f342d84e00b69af92c7ebc))
+
+### [1.0.2](https://github.com/webpack-contrib/style-loader/compare/v1.0.1...v1.0.2) (2019-12-17)
+
+
+### Bug Fixes
+
+* support ES module syntax ([#435](https://github.com/webpack-contrib/style-loader/issues/435)) ([dcbfadb](https://github.com/webpack-contrib/style-loader/commit/dcbfadb4245e7f0ce888aafc138cbac27d053915))
+
+### [1.0.1](https://github.com/webpack-contrib/style-loader/compare/v1.0.0...v1.0.1) (2019-11-28)
+
+
+### Bug Fixes
+
+* compatibility `linkTag` with ES module syntax ([#429](https://github.com/webpack-contrib/style-loader/issues/429)) ([2cdb9c3](https://github.com/webpack-contrib/style-loader/commit/2cdb9c3f51edebec69e8b22ff43b520a5e1c679b))
+
+## [1.0.0](https://github.com/webpack-contrib/style-loader/compare/v0.23.1...v1.0.0) (2019-08-06)
+
+
+### Bug Fixes
+
+* es3 compatibility ([#390](https://github.com/webpack-contrib/style-loader/issues/390)) ([ae24ec2](https://github.com/webpack-contrib/style-loader/commit/ae24ec2))
+* restore original hot reloading behaviour for locals ([#419](https://github.com/webpack-contrib/style-loader/issues/419)) ([f026429](https://github.com/webpack-contrib/style-loader/commit/f026429))
+* better handle source maps ([#383](https://github.com/webpack-contrib/style-loader/issues/383)) ([84ec8e5](https://github.com/webpack-contrib/style-loader/commit/84ec8e5))
+
+
+### Features
+
+* new `injectType` option ([e2664e9](https://github.com/webpack-contrib/style-loader/commit/e2664e9))
+* remove type `text/css` from style and link element ([#399](https://github.com/webpack-contrib/style-loader/issues/399)) ([b0187d6](https://github.com/webpack-contrib/style-loader/commit/b0187d6))
+
+
+### BREAKING CHANGES
+
+* minimum required Node.js version is `8.9.0`
+* minimum required `wepback` version is `4.0.0`
+* the `convertToAbsoluteUrls` option was removed, you don't need this anymore
+* the `attrs` option was renamed to the `attributes` option
+* the `transform` option was removed without replacement
+* the `hmr` option was removed, `webpack` automatically inject HMR code when it is required (when the `HotModuleReplacementPlugin` plugin was used)
+* the `sourceMap` option was removed. The loader automatically inject source maps if the previous loader emit them
+* the `ref`/`unref` api methods were removed for `useable` loader, please use the `use`/`unuse` api methods
+* the `style-loader/url` loader was removed in favor `injectType` option (look the documentation about the `injectType` option)
+* the `style-loader/useable` loader was removed in favor `injectType` option (look the documentation about the `injectType` option)
+* the `singleton` option was removed (look documentation about the `injectType` option)
+* the `insertAt` option was removed in favor the `insert` option (look the documentation about the `insert` option and examples)
+* the `insertInto` options was removed in favor the `insert` option (look the documentation about the `insert` option and examples)
+
+
+<a name="0.23.1"></a>
+## [0.23.1](https://github.com/webpack-contrib/style-loader/compare/v0.23.0...v0.23.1) (2018-10-08)
+
+
+### Bug Fixes
+
+* **addStyles:** support exports of transpiled transforms (`options.transform`) ([#333](https://github.com/webpack-contrib/style-loader/issues/333)) ([33aebed](https://github.com/webpack-contrib/style-loader/commit/33aebed))
+
+
+
+<a name="0.23.0"></a>
+# [0.23.0](https://github.com/webpack-contrib/style-loader/compare/v0.22.1...v0.23.0) (2018-08-27)
+
+
+### Features
+
+* **useable:** add `insertInto` support (`options.insertInto`) ([#341](https://github.com/webpack-contrib/style-loader/issues/341)) ([2588aca](https://github.com/webpack-contrib/style-loader/commit/2588aca))
+
+
+
+<a name="0.22.1"></a>
+## [0.22.1](https://github.com/webpack-contrib/style-loader/compare/v0.22.0...v0.22.1) (2018-08-08)
+
+
+### Bug Fixes
+
+* **addStyles:** use `var` instead of `const` (IE fix) ([#338](https://github.com/webpack-contrib/style-loader/issues/338)) ([1ca12ab](https://github.com/webpack-contrib/style-loader/commit/1ca12ab))
+
+
+
+<a name="0.22.0"></a>
+# [0.22.0](https://github.com/webpack-contrib/style-loader/compare/v0.21.0...v0.22.0) (2018-08-07)
+
+
+### Bug Fixes
+
+* insertInto and insertAt collaboration ([#325](https://github.com/webpack-contrib/style-loader/issues/325)) ([c7d8fec](https://github.com/webpack-contrib/style-loader/commit/c7d8fec))
+
+
+### Features
+
+* add support for __webpack_nonce__ ([#319](https://github.com/webpack-contrib/style-loader/issues/319)) ([fc24512](https://github.com/webpack-contrib/style-loader/commit/fc24512))
+
+
+
+<a name="0.21.0"></a>
+# [0.21.0](https://github.com/webpack-contrib/style-loader/compare/v0.20.3...v0.21.0) (2018-04-18)
+
+
+### Features
+
+* enable tag type configuration ([#316](https://github.com/webpack-contrib/style-loader/issues/316)) ([892cba5](https://github.com/webpack-contrib/style-loader/commit/892cba5))
+
+
+
+<a name="0.20.3"></a>
+## [0.20.3](https://github.com/webpack-contrib/style-loader/compare/v0.20.2...v0.20.3) (2018-03-09)
+
+
+### Bug Fixes
+
+* **package:** update `schema-utils` v0.4.3...0.4.5 (`dependencies`) ([#308](https://github.com/webpack-contrib/style-loader/issues/308)) ([9455888](https://github.com/webpack-contrib/style-loader/commit/9455888))
+
+
+
+<a name="0.20.2"></a>
+## [0.20.2](https://github.com/webpack-contrib/style-loader/compare/v0.20.1...v0.20.2) (2018-02-15)
+
+
+### Bug Fixes
+
+* **urls:** skip empty `url()` handling ([#304](https://github.com/webpack-contrib/style-loader/issues/304)) ([64f12dc](https://github.com/webpack-contrib/style-loader/commit/64f12dc))
+
+
+
+<a name="0.20.1"></a>
+## [0.20.1](https://github.com/webpack-contrib/style-loader/compare/v0.20.0...v0.20.1) (2018-01-26)
+
+
+### Bug Fixes
+
+* **index:** source code indentation ([#299](https://github.com/webpack-contrib/style-loader/issues/299)) ([b4642e7](https://github.com/webpack-contrib/style-loader/commit/b4642e7))
+
+
+
+<a name="0.20.0"></a>
+# [0.20.0](https://github.com/webpack-contrib/style-loader/compare/v0.19.1...v0.20.0) (2018-01-26)
+
+
+### Bug Fixes
+
+* **addStyles:** check if `HTMLIFrameElement` exist ([#296](https://github.com/webpack-contrib/style-loader/issues/296)) ([9b46128](https://github.com/webpack-contrib/style-loader/commit/9b46128))
+* **index:** enable HMR in case `locals` (`css-modules`) are unchanged ([#298](https://github.com/webpack-contrib/style-loader/issues/298)) ([3a4cb53](https://github.com/webpack-contrib/style-loader/commit/3a4cb53))
+* **options:** add `transform` option validation (`{String}`) ([23c3567](https://github.com/webpack-contrib/style-loader/commit/23c3567))
+* **options:** support passing a `{Function}` (`options.insertInto`) ([e0c4b19](https://github.com/webpack-contrib/style-loader/commit/e0c4b19))
+
+
+### Features
+
+* support passing a `{Function}` (`options.insertInto`) ([#279](https://github.com/webpack-contrib/style-loader/issues/279)) ([0eb8fe7](https://github.com/webpack-contrib/style-loader/commit/0eb8fe7))
+
+
+
+<a name="0.19.1"></a>
+## [0.19.1](https://github.com/webpack/style-loader/compare/v0.19.0...v0.19.1) (2017-12-14)
+
+
+### Bug Fixes
+
+* **addStyles:** correctly check `singleton` behavior when `{Boolean}` (`options.singleton`) ([#285](https://github.com/webpack/style-loader/issues/285)) ([2bfc93e](https://github.com/webpack/style-loader/commit/2bfc93e))
+
+
+
+<a name="0.19.0"></a>
+# [0.19.0](https://github.com/webpack/style-loader/compare/v0.18.2...v0.19.0) (2017-10-03)
+
+
+### Features
+
+* add option to enable/disable HMR (`options.hmr`) ([#264](https://github.com/webpack/style-loader/issues/264)) ([378e906](https://github.com/webpack/style-loader/commit/378e906))
+* add support for iframes (`options.insertInto`) ([#248](https://github.com/webpack/style-loader/issues/248)) ([25e8e89](https://github.com/webpack/style-loader/commit/25e8e89))
+* support 'before' insertions (`options.insertAt`) ([#253](https://github.com/webpack/style-loader/issues/253)) ([67120f8](https://github.com/webpack/style-loader/commit/67120f8))
+
+
+
 <a name="0.18.2"></a>
 ## [0.18.2](https://github.com/webpack/style-loader/compare/v0.18.1...v0.18.2) (2017-06-05)
 

babel.config.js

@@ -0,0 +1,34 @@
+const MIN_BABEL_VERSION = 7;
+
+module.exports = (api) => {
+  api.assertVersion(MIN_BABEL_VERSION);
+  api.cache(true);
+
+  return {
+    presets: [
+      [
+        '@babel/preset-env',
+        {
+          targets: {
+            node: '8.9.0',
+          },
+        },
+      ],
+    ],
+    overrides: [
+      {
+        test: './src/runtime',
+        presets: [
+          [
+            '@babel/preset-env',
+            {
+              targets: {
+                node: '0.12',
+              },
+            },
+          ],
+        ],
+      },
+    ],
+  };
+};

commitlint.config.js

@@ -0,0 +1,3 @@
+module.exports = {
+  extends: ['@commitlint/config-conventional'],
+};

husky.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  hooks: {
+    'pre-commit': 'lint-staged',
+    'commit-msg': 'commitlint -E HUSKY_GIT_PARAMS',
+  },
+};

lint-staged.config.js

@@ -0,0 +1,4 @@
+module.exports = {
+  '*.js': ['prettier --write', 'eslint --fix'],
+  '*.{json,md,yml,css,ts}': ['prettier --write'],
+};

package.json

@@ -1,40 +1,86 @@
 {
   "name": "style-loader",
-  "version": "0.18.2",
-  "author": "Tobias Koppers @sokra",
+  "version": "1.1.4",
   "description": "style loader module for webpack",
+  "license": "MIT",
+  "repository": "webpack-contrib/style-loader",
+  "author": "Tobias Koppers @sokra",
+  "homepage": "https://github.com/webpack-contrib/style-loader",
+  "bugs": "https://github.com/webpack-contrib/style-loader/issues",
+  "funding": {
+    "type": "opencollective",
+    "url": "https://opencollective.com/webpack"
+  },
+  "main": "dist/cjs.js",
   "engines": {
-    "node": ">= 0.12.0"
+    "node": ">= 8.9.0"
+  },
+  "scripts": {
+    "start": "npm run build -- -w",
+    "clean": "del-cli dist",
+    "validate:runtime": "es-check es3 \"dist/runtime/**/*.js\"",
+    "prebuild": "npm run clean",
+    "build": "cross-env NODE_ENV=production babel src -d dist --copy-files",
+    "postbuild": "npm run validate:runtime",
+    "commitlint": "commitlint --from=master",
+    "security": "npm audit",
+    "lint:prettier": "prettier --list-different .",
+    "lint:js": "eslint --cache .",
+    "lint": "npm-run-all -l -p \"lint:**\"",
+    "test:only": "cross-env NODE_ENV=test jest",
+    "test:watch": "npm run test:only -- --watch",
+    "test:coverage": "npm run test:only -- --collectCoverageFrom=\"src/**/*.js\" --coverage",
+    "test:manual": "npm run build && webpack-dev-server test/manual/src/index.js --open --config test/manual/webpack.config.js",
+    "pretest": "npm run lint",
+    "test": "npm run test:coverage",
+    "prepare": "npm run build",
+    "release": "standard-version",
+    "defaults": "webpack-defaults"
   },
-  "main": "index.js",
   "files": [
-    "lib",
-    "url.js",
-    "index.js",
-    "useable.js",
-    "options.json"
+    "dist"
   ],
+  "peerDependencies": {
+    "webpack": "^4.0.0 || ^5.0.0"
+  },
   "dependencies": {
-    "loader-utils": "^1.0.2",
-    "schema-utils": "^0.3.0"
+    "loader-utils": "^2.0.0",
+    "schema-utils": "^2.6.5"
   },
   "devDependencies": {
-    "css-loader": "^0.28.3",
-    "file-loader": "^0.11.1",
-    "jsdom": "^9.12.0",
-    "memory-fs": "^0.4.1",
-    "mocha": "^3.4.2",
-    "standard-version": "^4.0.0",
-    "webpack": "^2.6.1"
-  },
-  "scripts": {
-    "test": "mocha",
-    "travis:test": "yarn run test",
-    "release": "yarn run standard-version"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git@github.com:webpack/style-loader.git"
+    "@babel/cli": "^7.8.4",
+    "@babel/core": "^7.9.0",
+    "@babel/preset-env": "^7.9.5",
+    "@commitlint/cli": "^8.3.5",
+    "@commitlint/config-conventional": "^8.3.4",
+    "@webpack-contrib/defaults": "^6.3.0",
+    "@webpack-contrib/eslint-config-webpack": "^3.0.0",
+    "babel-jest": "^25.3.0",
+    "cross-env": "^7.0.2",
+    "css-loader": "^3.5.2",
+    "del": "^5.1.0",
+    "del-cli": "^3.0.0",
+    "es-check": "^5.1.0",
+    "eslint": "^6.8.0",
+    "eslint-config-prettier": "^6.10.1",
+    "eslint-plugin-import": "^2.20.2",
+    "file-loader": "^6.0.0",
+    "husky": "^4.2.5",
+    "jest": "^25.3.0",
+    "jsdom": "^15.2.1",
+    "lint-staged": "^10.1.3",
+    "memfs": "^3.1.2",
+    "npm-run-all": "^4.1.5",
+    "prettier": "^2.0.4",
+    "sass": "^1.26.3",
+    "sass-loader": "^8.0.2",
+    "semver": "^7.3.2",
+    "standard-version": "^7.1.0",
+    "webpack": "^4.42.1",
+    "webpack-cli": "^3.3.11",
+    "webpack-dev-server": "^3.10.3"
   },
-  "license": "MIT"
+  "keywords": [
+    "webpack"
+  ]
 }

src/cjs.js

@@ -0,0 +1,3 @@
+const loader = require('./index');
+
+module.exports = loader.default;

src/index.js

@@ -0,0 +1,263 @@
+import path from 'path';
+
+import loaderUtils from 'loader-utils';
+import validateOptions from 'schema-utils';
+
+import schema from './options.json';
+
+const loaderApi = () => {};
+
+loaderApi.pitch = function loader(request) {
+  const options = loaderUtils.getOptions(this);
+
+  validateOptions(schema, options, {
+    name: 'Style Loader',
+    baseDataPath: 'options',
+  });
+
+  const insert =
+    typeof options.insert === 'undefined'
+      ? '"head"'
+      : typeof options.insert === 'string'
+      ? JSON.stringify(options.insert)
+      : options.insert.toString();
+  const injectType = options.injectType || 'styleTag';
+  const esModule =
+    typeof options.esModule !== 'undefined' ? options.esModule : false;
+
+  delete options.esModule;
+
+  switch (injectType) {
+    case 'linkTag': {
+      const hmrCode = this.hot
+        ? `
+if (module.hot) {
+  module.hot.accept(
+    ${loaderUtils.stringifyRequest(this, `!!${request}`)},
+    function() {
+     ${
+       esModule
+         ? `update(content);`
+         : `var newContent = require(${loaderUtils.stringifyRequest(
+             this,
+             `!!${request}`
+           )});
+
+           newContent = newContent.__esModule ? newContent.default : newContent;
+
+           update(newContent);`
+     }
+    }
+  );
+
+  module.hot.dispose(function() {
+    update();
+  });
+}`
+        : '';
+
+      return `${
+        esModule
+          ? `import api from ${loaderUtils.stringifyRequest(
+              this,
+              `!${path.join(__dirname, 'runtime/injectStylesIntoLinkTag.js')}`
+            )};
+            import content from ${loaderUtils.stringifyRequest(
+              this,
+              `!!${request}`
+            )};`
+          : `var api = require(${loaderUtils.stringifyRequest(
+              this,
+              `!${path.join(__dirname, 'runtime/injectStylesIntoLinkTag.js')}`
+            )});
+            var content = require(${loaderUtils.stringifyRequest(
+              this,
+              `!!${request}`
+            )});
+
+            content = content.__esModule ? content.default : content;`
+      }
+
+var options = ${JSON.stringify(options)};
+
+options.insert = ${insert};
+
+var update = api(content, options);
+
+${hmrCode}
+
+${esModule ? `export default {}` : ''}`;
+    }
+
+    case 'lazyStyleTag':
+    case 'lazySingletonStyleTag': {
+      const isSingleton = injectType === 'lazySingletonStyleTag';
+
+      const hmrCode = this.hot
+        ? `
+if (module.hot) {
+  var lastRefs = module.hot.data && module.hot.data.refs || 0;
+
+  if (lastRefs) {
+    exported.use();
+
+    if (!content.locals) {
+      refs = lastRefs;
+    }
+  }
+
+  if (!content.locals) {
+    module.hot.accept();
+  }
+
+  module.hot.dispose(function(data) {
+    data.refs = content.locals ? 0 : refs;
+
+    if (dispose) {
+      dispose();
+    }
+  });
+}`
+        : '';
+
+      return `${
+        esModule
+          ? `import api from ${loaderUtils.stringifyRequest(
+              this,
+              `!${path.join(__dirname, 'runtime/injectStylesIntoStyleTag.js')}`
+            )};
+            import content from ${loaderUtils.stringifyRequest(
+              this,
+              `!!${request}`
+            )};`
+          : `var api = require(${loaderUtils.stringifyRequest(
+              this,
+              `!${path.join(__dirname, 'runtime/injectStylesIntoStyleTag.js')}`
+            )});
+            var content = require(${loaderUtils.stringifyRequest(
+              this,
+              `!!${request}`
+            )});
+
+            content = content.__esModule ? content.default : content;
+
+            if (typeof content === 'string') {
+              content = [[module.id, content, '']];
+            }`
+      }
+
+var refs = 0;
+var dispose;
+var options = ${JSON.stringify(options)};
+
+options.insert = ${insert};
+options.singleton = ${isSingleton};
+
+var exported = {};
+
+if (content.locals) {
+  exported.locals = content.locals;
+}
+
+exported.use = function() {
+  if (!(refs++)) {
+    dispose = api(content, options);
+  }
+
+  return exported;
+};
+
+exported.unuse = function() {
+  if (refs > 0 && !--refs) {
+    dispose();
+    dispose = null;
+  }
+};
+
+${hmrCode}
+
+${esModule ? 'export default' : 'module.exports ='} exported;`;
+    }
+
+    case 'styleTag':
+    case 'singletonStyleTag':
+    default: {
+      const isSingleton = injectType === 'singletonStyleTag';
+
+      const hmrCode = this.hot
+        ? `
+if (module.hot) {
+  if (!content.locals) {
+    module.hot.accept(
+      ${loaderUtils.stringifyRequest(this, `!!${request}`)},
+      function () {
+        ${
+          esModule
+            ? `update(content);`
+            : `var newContent = require(${loaderUtils.stringifyRequest(
+                this,
+                `!!${request}`
+              )});
+
+              newContent = newContent.__esModule ? newContent.default : newContent;
+
+              if (typeof newContent === 'string') {
+                newContent = [[module.id, newContent, '']];
+              }
+
+              update(newContent);`
+        }
+      }
+    )
+  }
+
+  module.hot.dispose(function() {
+    update();
+  });
+}`
+        : '';
+
+      return `${
+        esModule
+          ? `import api from ${loaderUtils.stringifyRequest(
+              this,
+              `!${path.join(__dirname, 'runtime/injectStylesIntoStyleTag.js')}`
+            )};
+            import content from ${loaderUtils.stringifyRequest(
+              this,
+              `!!${request}`
+            )};
+            var clonedContent = content;`
+          : `var api = require(${loaderUtils.stringifyRequest(
+              this,
+              `!${path.join(__dirname, 'runtime/injectStylesIntoStyleTag.js')}`
+            )});
+            var content = require(${loaderUtils.stringifyRequest(
+              this,
+              `!!${request}`
+            )});
+
+            content = content.__esModule ? content.default : content;
+
+            if (typeof content === 'string') {
+              content = [[module.id, content, '']];
+            }`
+      }
+
+var options = ${JSON.stringify(options)};
+
+options.insert = ${insert};
+options.singleton = ${isSingleton};
+
+var update = api(content, options);
+
+var exported = content.locals ? content.locals : {};
+
+${hmrCode}
+
+${esModule ? 'export default' : 'module.exports ='} exported;`;
+    }
+  }
+};
+
+export default loaderApi;

src/options.json

@@ -0,0 +1,39 @@
+{
+  "type": "object",
+  "properties": {
+    "injectType": {
+      "description": "Allows to setup how styles will be injected into DOM (https://github.com/webpack-contrib/style-loader#injecttype).",
+      "enum": [
+        "styleTag",
+        "singletonStyleTag",
+        "lazyStyleTag",
+        "lazySingletonStyleTag",
+        "linkTag"
+      ]
+    },
+    "attributes": {
+      "description": "Adds custom attributes to tag (https://github.com/webpack-contrib/style-loader#attributes).",
+      "type": "object"
+    },
+    "insert": {
+      "description": "Inserts `<style>`/`<link>` at the given position (https://github.com/webpack-contrib/style-loader#insert).",
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "instanceof": "Function"
+        }
+      ]
+    },
+    "base": {
+      "description": "Sets module ID base for DLLPlugin (https://github.com/webpack-contrib/style-loader#base).",
+      "type": "number"
+    },
+    "esModule": {
+      "description": "Use the ES modules syntax (https://github.com/webpack-contrib/css-loader#esmodule).",
+      "type": "boolean"
+    }
+  },
+  "additionalProperties": false
+}

src/runtime/injectStylesIntoLinkTag.js

@@ -0,0 +1,74 @@
+const getTarget = (function getTarget() {
+  const memo = {};
+
+  return function memorize(target) {
+    if (typeof memo[target] === 'undefined') {
+      let styleTarget = document.querySelector(target);
+
+      // Special case to return head of iframe instead of iframe itself
+      if (
+        window.HTMLIFrameElement &&
+        styleTarget instanceof window.HTMLIFrameElement
+      ) {
+        try {
+          // This will throw an exception if access to iframe is blocked
+          // due to cross-origin restrictions
+          styleTarget = styleTarget.contentDocument.head;
+        } catch (e) {
+          // istanbul ignore next
+          styleTarget = null;
+        }
+      }
+
+      memo[target] = styleTarget;
+    }
+
+    return memo[target];
+  };
+})();
+
+module.exports = (url, options) => {
+  options = options || {};
+  options.attributes =
+    typeof options.attributes === 'object' ? options.attributes : {};
+
+  if (typeof options.attributes.nonce === 'undefined') {
+    const nonce =
+      typeof __webpack_nonce__ !== 'undefined' ? __webpack_nonce__ : null;
+
+    if (nonce) {
+      options.attributes.nonce = nonce;
+    }
+  }
+
+  const link = document.createElement('link');
+
+  link.rel = 'stylesheet';
+  link.href = url;
+
+  Object.keys(options.attributes).forEach((key) => {
+    link.setAttribute(key, options.attributes[key]);
+  });
+
+  if (typeof options.insert === 'function') {
+    options.insert(link);
+  } else {
+    const target = getTarget(options.insert || 'head');
+
+    if (!target) {
+      throw new Error(
+        "Couldn't find a style target. This probably means that the value for the 'insert' parameter is invalid."
+      );
+    }
+
+    target.appendChild(link);
+  }
+
+  return (newUrl) => {
+    if (typeof newUrl === 'string') {
+      link.href = newUrl;
+    } else {
+      link.parentNode.removeChild(link);
+    }
+  };
+};

src/runtime/injectStylesIntoStyleTag.js

@@ -0,0 +1,293 @@
+const isOldIE = (function isOldIE() {
+  let memo;
+
+  return function memorize() {
+    if (typeof memo === 'undefined') {
+      // Test for IE <= 9 as proposed by Browserhacks
+      // @see http://browserhacks.com/#hack-e71d8692f65334173fee715c222cb805
+      // Tests for existence of standard globals is to allow style-loader
+      // to operate correctly into non-standard environments
+      // @see https://github.com/webpack-contrib/style-loader/issues/177
+      memo = Boolean(window && document && document.all && !window.atob);
+    }
+
+    return memo;
+  };
+})();
+
+const getTarget = (function getTarget() {
+  const memo = {};
+
+  return function memorize(target) {
+    if (typeof memo[target] === 'undefined') {
+      let styleTarget = document.querySelector(target);
+
+      // Special case to return head of iframe instead of iframe itself
+      if (
+        window.HTMLIFrameElement &&
+        styleTarget instanceof window.HTMLIFrameElement
+      ) {
+        try {
+          // This will throw an exception if access to iframe is blocked
+          // due to cross-origin restrictions
+          styleTarget = styleTarget.contentDocument.head;
+        } catch (e) {
+          // istanbul ignore next
+          styleTarget = null;
+        }
+      }
+
+      memo[target] = styleTarget;
+    }
+
+    return memo[target];
+  };
+})();
+
+const stylesInDom = [];
+
+function getIndexByIdentifier(identifier) {
+  let result = -1;
+
+  for (let i = 0; i < stylesInDom.length; i++) {
+    if (stylesInDom[i].identifier === identifier) {
+      result = i;
+      break;
+    }
+  }
+
+  return result;
+}
+
+function modulesToDom(list, options) {
+  const idCountMap = {};
+  const identifiers = [];
+
+  for (let i = 0; i < list.length; i++) {
+    const item = list[i];
+    const id = options.base ? item[0] + options.base : item[0];
+    const count = idCountMap[id] || 0;
+    const identifier = `${id} ${count}`;
+
+    idCountMap[id] = count + 1;
+
+    const index = getIndexByIdentifier(identifier);
+    const obj = {
+      css: item[1],
+      media: item[2],
+      sourceMap: item[3],
+    };
+
+    if (index !== -1) {
+      stylesInDom[index].references++;
+      stylesInDom[index].updater(obj);
+    } else {
+      stylesInDom.push({
+        identifier,
+        updater: addStyle(obj, options),
+        references: 1,
+      });
+    }
+
+    identifiers.push(identifier);
+  }
+
+  return identifiers;
+}
+
+function insertStyleElement(options) {
+  const style = document.createElement('style');
+  const attributes = options.attributes || {};
+
+  if (typeof attributes.nonce === 'undefined') {
+    const nonce =
+      typeof __webpack_nonce__ !== 'undefined' ? __webpack_nonce__ : null;
+
+    if (nonce) {
+      attributes.nonce = nonce;
+    }
+  }
+
+  Object.keys(attributes).forEach((key) => {
+    style.setAttribute(key, attributes[key]);
+  });
+
+  if (typeof options.insert === 'function') {
+    options.insert(style);
+  } else {
+    const target = getTarget(options.insert || 'head');
+
+    if (!target) {
+      throw new Error(
+        "Couldn't find a style target. This probably means that the value for the 'insert' parameter is invalid."
+      );
+    }
+
+    target.appendChild(style);
+  }
+
+  return style;
+}
+
+function removeStyleElement(style) {
+  // istanbul ignore if
+  if (style.parentNode === null) {
+    return false;
+  }
+
+  style.parentNode.removeChild(style);
+}
+
+/* istanbul ignore next  */
+const replaceText = (function replaceText() {
+  const textStore = [];
+
+  return function replace(index, replacement) {
+    textStore[index] = replacement;
+
+    return textStore.filter(Boolean).join('\n');
+  };
+})();
+
+function applyToSingletonTag(style, index, remove, obj) {
+  const css = remove
+    ? ''
+    : obj.media
+    ? `@media ${obj.media} {${obj.css}}`
+    : obj.css;
+
+  // For old IE
+  /* istanbul ignore if  */
+  if (style.styleSheet) {
+    style.styleSheet.cssText = replaceText(index, css);
+  } else {
+    const cssNode = document.createTextNode(css);
+    const childNodes = style.childNodes;
+
+    if (childNodes[index]) {
+      style.removeChild(childNodes[index]);
+    }
+
+    if (childNodes.length) {
+      style.insertBefore(cssNode, childNodes[index]);
+    } else {
+      style.appendChild(cssNode);
+    }
+  }
+}
+
+function applyToTag(style, options, obj) {
+  let css = obj.css;
+  const media = obj.media;
+  const sourceMap = obj.sourceMap;
+
+  if (media) {
+    style.setAttribute('media', media);
+  } else {
+    style.removeAttribute('media');
+  }
+
+  if (sourceMap && btoa) {
+    css += `\n/*# sourceMappingURL=data:application/json;base64,${btoa(
+      unescape(encodeURIComponent(JSON.stringify(sourceMap)))
+    )} */`;
+  }
+
+  // For old IE
+  /* istanbul ignore if  */
+  if (style.styleSheet) {
+    style.styleSheet.cssText = css;
+  } else {
+    while (style.firstChild) {
+      style.removeChild(style.firstChild);
+    }
+
+    style.appendChild(document.createTextNode(css));
+  }
+}
+
+let singleton = null;
+let singletonCounter = 0;
+
+function addStyle(obj, options) {
+  let style;
+  let update;
+  let remove;
+
+  if (options.singleton) {
+    const styleIndex = singletonCounter++;
+
+    style = singleton || (singleton = insertStyleElement(options));
+
+    update = applyToSingletonTag.bind(null, style, styleIndex, false);
+    remove = applyToSingletonTag.bind(null, style, styleIndex, true);
+  } else {
+    style = insertStyleElement(options);
+
+    update = applyToTag.bind(null, style, options);
+    remove = () => {
+      removeStyleElement(style);
+    };
+  }
+
+  update(obj);
+
+  return function updateStyle(newObj) {
+    if (newObj) {
+      if (
+        newObj.css === obj.css &&
+        newObj.media === obj.media &&
+        newObj.sourceMap === obj.sourceMap
+      ) {
+        return;
+      }
+
+      update((obj = newObj));
+    } else {
+      remove();
+    }
+  };
+}
+
+module.exports = (list, options) => {
+  options = options || {};
+
+  // Force single-tag solution on IE6-9, which has a hard limit on the # of <style>
+  // tags it will allow on a page
+  if (!options.singleton && typeof options.singleton !== 'boolean') {
+    options.singleton = isOldIE();
+  }
+
+  list = list || [];
+
+  let lastIdentifiers = modulesToDom(list, options);
+
+  return function update(newList) {
+    newList = newList || [];
+
+    if (Object.prototype.toString.call(newList) !== '[object Array]') {
+      return;
+    }
+
+    for (let i = 0; i < lastIdentifiers.length; i++) {
+      const identifier = lastIdentifiers[i];
+      const index = getIndexByIdentifier(identifier);
+
+      stylesInDom[index].references--;
+    }
+
+    const newLastIdentifiers = modulesToDom(newList, options);
+
+    for (let i = 0; i < lastIdentifiers.length; i++) {
+      const identifier = lastIdentifiers[i];
+      const index = getIndexByIdentifier(identifier);
+
+      if (stylesInDom[index].references === 0) {
+        stylesInDom[index].updater();
+        stylesInDom.splice(index, 1);
+      }
+    }
+
+    lastIdentifiers = newLastIdentifiers;
+  };
+};

test/__snapshots__/attributes-option.test.js.snap

@@ -0,0 +1,319 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "lazySingletonStyleTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style type=\\"text/css\\" foo=\\"bar\\" data-id=\\"style-tag-id\\">body {
+  color: red;
+}
+h1 {
+  color: blue;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "lazySingletonStyleTag": errors 1`] = `Array []`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "lazySingletonStyleTag": warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "lazyStyleTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style type=\\"text/css\\" foo=\\"bar\\" data-id=\\"style-tag-id\\">body {
+  color: red;
+}
+</style><style type=\\"text/css\\" foo=\\"bar\\" data-id=\\"style-tag-id\\">h1 {
+  color: blue;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "lazyStyleTag": errors 1`] = `Array []`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "lazyStyleTag": warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "linkTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<link rel=\\"stylesheet\\" href=\\"style.css\\" type=\\"text/css\\" foo=\\"bar\\" data-id=\\"style-tag-id\\"><link rel=\\"stylesheet\\" href=\\"style-other.css\\" type=\\"text/css\\" foo=\\"bar\\" data-id=\\"style-tag-id\\"></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "linkTag": errors 1`] = `Array []`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "linkTag": warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "singletonStyleTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style type=\\"text/css\\" foo=\\"bar\\" data-id=\\"style-tag-id\\">body {
+  color: red;
+}
+h1 {
+  color: blue;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "singletonStyleTag": errors 1`] = `Array []`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "singletonStyleTag": warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "styleTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style type=\\"text/css\\" foo=\\"bar\\" data-id=\\"style-tag-id\\">body {
+  color: red;
+}
+</style><style type=\\"text/css\\" foo=\\"bar\\" data-id=\\"style-tag-id\\">h1 {
+  color: blue;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "styleTag": errors 1`] = `Array []`;
+
+exports[`"attributes" option should add attributes to tag when the "injectType" option is "styleTag": warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "lazySingletonStyleTag" #2: DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style nonce=\\"12345678\\">body {
+  color: red;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "lazySingletonStyleTag" #2: errors 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "lazySingletonStyleTag" #2: warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "lazySingletonStyleTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style nonce=\\"12345678\\">body {
+  color: red;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "lazySingletonStyleTag": errors 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "lazySingletonStyleTag": warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "lazyStyleTag" #2: DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style nonce=\\"12345678\\">body {
+  color: red;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "lazyStyleTag" #2: errors 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "lazyStyleTag" #2: warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "lazyStyleTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style nonce=\\"12345678\\">body {
+  color: red;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "lazyStyleTag": errors 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "lazyStyleTag": warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "linkTag" #2: DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<link rel=\\"stylesheet\\" href=\\"style.css\\" nonce=\\"12345678\\"></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "linkTag" #2: errors 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "linkTag" #2: warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "linkTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<link rel=\\"stylesheet\\" href=\\"style.css\\" nonce=\\"12345678\\"></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "linkTag": errors 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "linkTag": warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "singletonStyleTag" #2: DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style nonce=\\"12345678\\">body {
+  color: red;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "singletonStyleTag" #2: errors 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "singletonStyleTag" #2: warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "singletonStyleTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style nonce=\\"12345678\\">body {
+  color: red;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "singletonStyleTag": errors 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "singletonStyleTag": warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "styleTag" #2: DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style nonce=\\"12345678\\">body {
+  color: red;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "styleTag" #2: errors 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "styleTag" #2: warnings 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "styleTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style nonce=\\"12345678\\">body {
+  color: red;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "styleTag": errors 1`] = `Array []`;
+
+exports[`"attributes" option should add nonce attribute when "injectType" option is "styleTag": warnings 1`] = `Array []`;

test/__snapshots__/base-option.test.js.snap

@@ -0,0 +1,25 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`"base" option should work: DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style>body {
+  color: red;
+}
+</style><style>h1 {
+  color: blue;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"base" option should work: errors 1`] = `Array []`;
+
+exports[`"base" option should work: warnings 1`] = `Array []`;

test/__snapshots__/injectType-option.test.js.snap

@@ -0,0 +1,115 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`"injectType" option should work when the "injectType" option is "lazySingletonStyleTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style>body {
+  color: red;
+}
+h1 {
+  color: blue;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"injectType" option should work when the "injectType" option is "lazySingletonStyleTag": errors 1`] = `Array []`;
+
+exports[`"injectType" option should work when the "injectType" option is "lazySingletonStyleTag": warnings 1`] = `Array []`;
+
+exports[`"injectType" option should work when the "injectType" option is "lazyStyleTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style>body {
+  color: red;
+}
+</style><style>h1 {
+  color: blue;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"injectType" option should work when the "injectType" option is "lazyStyleTag": errors 1`] = `Array []`;
+
+exports[`"injectType" option should work when the "injectType" option is "lazyStyleTag": warnings 1`] = `Array []`;
+
+exports[`"injectType" option should work when the "injectType" option is "linkTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<link rel=\\"stylesheet\\" href=\\"style.css\\"><link rel=\\"stylesheet\\" href=\\"style-other.css\\"></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"injectType" option should work when the "injectType" option is "linkTag": errors 1`] = `Array []`;
+
+exports[`"injectType" option should work when the "injectType" option is "linkTag": warnings 1`] = `Array []`;
+
+exports[`"injectType" option should work when the "injectType" option is "singletonStyleTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style>body {
+  color: red;
+}
+h1 {
+  color: blue;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"injectType" option should work when the "injectType" option is "singletonStyleTag": errors 1`] = `Array []`;
+
+exports[`"injectType" option should work when the "injectType" option is "singletonStyleTag": warnings 1`] = `Array []`;
+
+exports[`"injectType" option should work when the "injectType" option is "styleTag": DOM 1`] = `
+"<!DOCTYPE html><html><head>
+  <title>style-loader test</title>
+  <style id=\\"existing-style\\">.existing { color: yellow }</style>
+<style>body {
+  color: red;
+}
+</style><style>h1 {
+  color: blue;
+}
+</style></head>
+<body>
+  <h1>Body</h1>
+  <div class=\\"target\\"></div>
+  <iframe class=\\"iframeTarget\\"></iframe>
+
+
+</body></html>"
+`;
+
+exports[`"injectType" option should work when the "injectType" option is "styleTag": errors 1`] = `Array []`;
+
+exports[`"injectType" option should work when the "injectType" option is "styleTag": warnings 1`] = `Array []`;

test/__snapshots__/validate-options.test.js.snap

@@ -0,0 +1,79 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`validate options should throw an error on the "attributes" option with "true" value 1`] = `
+"Invalid options object. Style Loader has been initialized using an options object that does not match the API schema.
+ - options.attributes should be an object:
+   object { … }
+   -> Adds custom attributes to tag (https://github.com/webpack-contrib/style-loader#attributes)."
+`;
+
+exports[`validate options should throw an error on the "esModule" option with "true" value 1`] = `
+"Invalid options object. Style Loader has been initialized using an options object that does not match the API schema.
+ - options.esModule should be a boolean.
+   -> Use the ES modules syntax (https://github.com/webpack-contrib/css-loader#esmodule)."
+`;
+
+exports[`validate options should throw an error on the "injectType" option with "unknown" value 1`] = `
+"Invalid options object. Style Loader has been initialized using an options object that does not match the API schema.
+ - options.injectType should be one of these:
+   \\"styleTag\\" | \\"singletonStyleTag\\" | \\"lazyStyleTag\\" | \\"lazySingletonStyleTag\\" | \\"linkTag\\"
+   -> Allows to setup how styles will be injected into DOM (https://github.com/webpack-contrib/style-loader#injecttype)."
+`;
+
+exports[`validate options should throw an error on the "insert" option with "true" value 1`] = `
+"Invalid options object. Style Loader has been initialized using an options object that does not match the API schema.
+ - options.insert should be one of these:
+   string | function
+   -> Inserts \`<style>\`/\`<link>\` at the given position (https://github.com/webpack-contrib/style-loader#insert).
+   Details:
+    * options.insert should be a string.
+    * options.insert should be an instance of function."
+`;
+
+exports[`validate options should throw an error on the "unknown" option with "/test/" value 1`] = `
+"Invalid options object. Style Loader has been initialized using an options object that does not match the API schema.
+ - options has an unknown property 'unknown'. These properties are valid:
+   object { injectType?, attributes?, insert?, base?, esModule? }"
+`;
+
+exports[`validate options should throw an error on the "unknown" option with "[]" value 1`] = `
+"Invalid options object. Style Loader has been initialized using an options object that does not match the API schema.
+ - options has an unknown property 'unknown'. These properties are valid:
+   object { injectType?, attributes?, insert?, base?, esModule? }"
+`;
+
+exports[`validate options should throw an error on the "unknown" option with "{"foo":"bar"}" value 1`] = `
+"Invalid options object. Style Loader has been initialized using an options object that does not match the API schema.
+ - options has an unknown property 'unknown'. These properties are valid:
+   object { injectType?, attributes?, insert?, base?, esModule? }"
+`;
+
+exports[`validate options should throw an error on the "unknown" option with "{}" value 1`] = `
+"Invalid options object. Style Loader has been initialized using an options object that does not match the API schema.
+ - options has an unknown property 'unknown'. These properties are valid:
+   object { injectType?, attributes?, insert?, base?, esModule? }"
+`;
+
+exports[`validate options should throw an error on the "unknown" option with "1" value 1`] = `
+"Invalid options object. Style Loader has been initialized using an options object that does not match the API schema.
+ - options has an unknown property 'unknown'. These properties are valid:
+   object { injectType?, attributes?, insert?, base?, esModule? }"
+`;
+
+exports[`validate options should throw an error on the "unknown" option with "false" value 1`] = `
+"Invalid options object. Style Loader has been initialized using an options object that does not match the API schema.
+ - options has an unknown property 'unknown'. These properties are valid:
+   object { injectType?, attributes?, insert?, base?, esModule? }"
+`;
+
+exports[`validate options should throw an error on the "unknown" option with "test" value 1`] = `
+"Invalid options object. Style Loader has been initialized using an options object that does not match the API schema.
+ - options has an unknown property 'unknown'. These properties are valid:
+   object { injectType?, attributes?, insert?, base?, esModule? }"
+`;
+
+exports[`validate options should throw an error on the "unknown" option with "true" value 1`] = `
+"Invalid options object. Style Loader has been initialized using an options object that does not match the API schema.
+ - options has an unknown property 'unknown'. These properties are valid:
+   object { injectType?, attributes?, insert?, base?, esModule? }"
+`;

test/attributes-option.test.js

@@ -0,0 +1,72 @@
+import {
+  compile,
+  getCompiler,
+  getEntryByInjectType,
+  getErrors,
+  getWarnings,
+  runInJsDom,
+} from './helpers/index';
+
+describe('"attributes" option', () => {
+  const injectTypes = [
+    'styleTag',
+    'singletonStyleTag',
+    'lazyStyleTag',
+    'lazySingletonStyleTag',
+    'linkTag',
+  ];
+
+  injectTypes.forEach((injectType) => {
+    it(`should add attributes to tag when the "injectType" option is "${injectType}"`, async () => {
+      expect.assertions(3);
+
+      const entry = getEntryByInjectType('simple.js', injectType);
+      const compiler = getCompiler(entry, {
+        injectType,
+        attributes: {
+          type: 'text/css',
+          foo: 'bar',
+          'data-id': 'style-tag-id',
+        },
+      });
+      const stats = await compile(compiler);
+
+      runInJsDom('main.bundle.js', compiler, stats, (dom) => {
+        expect(dom.serialize()).toMatchSnapshot('DOM');
+      });
+
+      expect(getWarnings(stats)).toMatchSnapshot('warnings');
+      expect(getErrors(stats)).toMatchSnapshot('errors');
+    });
+
+    it(`should add nonce attribute when "injectType" option is "${injectType}"`, async () => {
+      expect.assertions(3);
+
+      const entry = getEntryByInjectType('nonce-require.js', injectType);
+      const compiler = getCompiler(entry, { injectType });
+      const stats = await compile(compiler);
+
+      runInJsDom('main.bundle.js', compiler, stats, (dom) => {
+        expect(dom.serialize()).toMatchSnapshot('DOM');
+      });
+
+      expect(getWarnings(stats)).toMatchSnapshot('warnings');
+      expect(getErrors(stats)).toMatchSnapshot('errors');
+    });
+
+    it(`should add nonce attribute when "injectType" option is "${injectType}" #2`, async () => {
+      expect.assertions(3);
+
+      const entry = getEntryByInjectType('nonce-import.js', injectType);
+      const compiler = getCompiler(entry, { injectType });
+      const stats = await compile(compiler);
+
+      runInJsDom('main.bundle.js', compiler, stats, (dom) => {
+        expect(dom.serialize()).toMatchSnapshot('DOM');
+      });
+
+      expect(getWarnings(stats)).toMatchSnapshot('warnings');
+      expect(getErrors(stats)).toMatchSnapshot('errors');
+    });
+  });
+});

test/base-option.test.js

@@ -0,0 +1,23 @@
+import {
+  compile,
+  getCompiler,
+  getErrors,
+  getWarnings,
+  runInJsDom,
+} from './helpers/index';
+
+describe('"base" option', () => {
+  it('should work', async () => {
+    expect.assertions(3);
+
+    const compiler = getCompiler('./simple.js', { base: 1000 });
+    const stats = await compile(compiler);
+
+    runInJsDom('main.bundle.js', compiler, stats, (dom) => {
+      expect(dom.serialize()).toMatchSnapshot('DOM');
+    });
+
+    expect(getWarnings(stats)).toMatchSnapshot('warnings');
+    expect(getErrors(stats)).toMatchSnapshot('errors');
+  });
+});

test/cjs.test.js

@@ -0,0 +1,8 @@
+import src from '../src';
+import cjs from '../src/cjs';
+
+describe('cjs', () => {
+  it('should exported', () => {
+    expect(cjs).toEqual(src);
+  });
+});