Initial commit.

.editorconfig

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+# WordPress Coding Standards
+# https://make.wordpress.org/core/handbook/coding-standards/
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+tab_width = 4
+indent_style = tab
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+indent_style = space
+indent_size = 2
+
+[*.txt]
+trim_trailing_whitespace = false
+
+[*.json]
+insert_final_newline = false
+indent_style = space
+indent_size = 2
+
+[.*rc]
+insert_final_newline = false
+indent_style = space
+indent_size = 2
+
+[*.yml]
+insert_final_newline = false
+indent_style = space
+indent_size = 2

.eslintrc.js

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+/**
+ * External dependencies
+ */
+const wpConfig = require( '@wordpress/scripts/config/.eslintrc.js' );
+
+const config = {
+	...wpConfig,
+	rules: {
+		...( wpConfig?.rules || {} ),
+		'no-var': 'off',
+	},
+};
+
+module.exports = config;

.gitattributes

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+/.git export-ignore
+/.github export-ignore
+/.wordpress-org export-ignore
+/build-cs export-ignore
+/node_modules export-ignore
+/tests export-ignore
+/vendor export-ignore
+
+/*.DS_store export-ignore
+/.DS_store? export-ignore
+
+/.editorconfig export-ignore
+/.eslintrc.js export-ignore
+/.gitattributes export-ignore
+/.gitignore export-ignore
+/.nvmrc export-ignore
+/.prettierignore export-ignore
+/.wp-env.json export-ignore
+/composer.json export-ignore
+/composer.lock export-ignore
+/package-lock.json export-ignore
+/package.json export-ignore
+/phpcs.xml.dist export-ignore
+/phpstan.neon.dist export-ignore
+/phpunit.xml.dist export-ignore
+/webpack.config.js export-ignore
+
+/CODE_OF_CONDUCT.md export-ignore
+/CONTRIBUTING.md export-ignore
+/SECURITY.md export-ignore
+/README.md export-ignore

.github/workflows/deploy-dotorg.yml

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+name: Deploy to WordPress.org
+
+on:
+  release:
+    types:
+      - published
+  workflow_dispatch:
+
+jobs:
+  release:
+    name: New Release${{ github.event_name == 'workflow_dispatch' && ' (dry run)' || '' }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Get plugin version
+        id: get-version
+        if: ${{ github.event_name == 'workflow_dispatch' }}
+        run: |
+          echo "version=$(awk '/Stable tag:        /{print $NF}' readme.txt)" >> $GITHUB_OUTPUT
+
+      - name: WordPress plugin deploy
+        uses: 10up/action-wordpress-plugin-deploy@stable
+        if: ${{ github.event_name == 'workflow_dispatch' }}
+        with:
+          dry-run: true
+        env:
+          SVN_PASSWORD: ${{ secrets.SVN_PASSWORD }}
+          SVN_USERNAME: ${{ secrets.SVN_USERNAME }}
+          SLUG: fast-smooth-scroll
+          VERSION: ${{ steps.get-version.outputs.version }}
+
+      - name: WordPress plugin deploy
+        uses: 10up/action-wordpress-plugin-deploy@stable
+        if: ${{ github.event_name != 'workflow_dispatch' }}
+        env:
+          SVN_PASSWORD: ${{ secrets.SVN_PASSWORD }}
+          SVN_USERNAME: ${{ secrets.SVN_USERNAME }}
+          SLUG: fast-smooth-scroll
+
+      - name: Upload release assets
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: ${{github.workspace}}/${{ github.event.repository.name }}.zip

.github/workflows/js-lint.yml

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+name: JS Code Linting
+
+on:
+  push:
+    branches:
+      - main
+    # Only run if JS/JSON/Lint/NVM files changed.
+    paths:
+      - '.github/workflows/js-lint.yml'
+      - '**.js'
+      - '**.json'
+      - '.eslint*'
+      - '.nvmrc'
+      - '.prettierignore'
+      - '.wp-env.json'
+      - '**/package.json'
+      - 'package-lock.json'
+  pull_request:
+    branches:
+      - main
+      - 'feature/**'
+    # Only run if JS/JSON/Lint/NVM files changed.
+    paths:
+      - '.github/workflows/js-lint.yml'
+      - '**.js'
+      - '**.json'
+      - '.eslint*'
+      - '.nvmrc'
+      - '.prettierignore'
+      - '.wp-env.json'
+      - '**/package.json'
+      - 'package-lock.json'
+    types:
+      - opened
+      - reopened
+      - synchronize
+
+jobs:
+  js-lint:
+    name: JS Lint
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    steps:
+      - uses: styfle/cancel-workflow-action@0.11.0
+
+      - uses: actions/checkout@v3
+
+      - name: Setup Node.js (via .nvmrc)
+        uses: actions/setup-node@v3
+        with:
+          node-version-file: '.nvmrc'
+          cache: npm
+
+      - name: npm install
+        run: npm ci
+
+      - name: JS Lint
+        run: npm run lint-js

.github/workflows/php-lint.yml

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+name: PHP Code Linting
+
+on:
+  push:
+    branches:
+      - main
+    # Only run if PHP-related files changed.
+    paths:
+      - '.github/workflows/php-lint.yml'
+      - '**.php'
+      - 'phpcs.xml.dist'
+      - 'phpstan.neon.dist'
+      - 'composer.json'
+      - 'composer.lock'
+  pull_request:
+    branches:
+      - main
+      - 'feature/**'
+    # Only run if PHP-related files changed.
+    paths:
+      - '.github/workflows/php-lint.yml'
+      - '**.php'
+      - 'phpcs.xml.dist'
+      - 'phpstan.neon.dist'
+      - 'composer.json'
+      - 'composer.lock'
+    types:
+      - opened
+      - reopened
+      - synchronize
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
+jobs:
+  php-lint:
+    name: PHP
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    steps:
+      - uses: styfle/cancel-workflow-action@0.11.0
+
+      - uses: actions/checkout@v3
+
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.0'
+
+      - name: Validate Composer configuration
+        run: composer validate
+
+      - name: PHP Lint
+        run: composer lint
+
+      - name: PHPStan
+        run: composer phpstan

.github/workflows/php-test.yml

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+name: PHP Unit Testing
+
+on:
+  push:
+    branches:
+      - main
+    # Only run if PHP-related files changed.
+    paths:
+      - '.github/workflows/php-test.yml'
+      - '**.php'
+      - '.wp-env.json'
+      - '**/package.json'
+      - 'package-lock.json'
+      - 'phpunit.xml.dist'
+      - 'composer.json'
+      - 'composer.lock'
+  pull_request:
+    branches:
+      - main
+      - 'feature/**'
+    # Only run if PHP-related files changed.
+    paths:
+      - '.github/workflows/php-test.yml'
+      - '**.php'
+      - '.wp-env.json'
+      - '**/package.json'
+      - 'package-lock.json'
+      - 'phpunit.xml.dist'
+      - 'composer.json'
+      - 'composer.lock'
+    types:
+      - opened
+      - reopened
+      - synchronize
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
+jobs:
+  php-test:
+    name: PHP ${{ matrix.php }} - WP ${{ matrix.wordpress }}${{ matrix.experimental && ' (experimental)' || '' }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    strategy:
+      fail-fast: true
+      matrix:
+        php:
+        - '7.0'
+        - '7.4'
+        - '8.0'
+        - '8.1'
+        - '8.2'
+        wordpress: [ 'latest' ]
+        experimental: [false]
+        include:
+          - php: '5.2'
+            wordpress: '5.0'
+          - php: '5.6'
+            wordpress: '5.2'
+          - php: '8.2'
+            wordpress: 'trunk'
+            experimental: true
+    env:
+      WP_ENV_PHP_VERSION: ${{ matrix.php }}
+      WP_ENV_CORE: ${{ matrix.wordpress == 'trunk' && 'WordPress/WordPress' || format( 'https://wordpress.org/wordpress-{0}.zip', matrix.wordpress ) }}
+    continue-on-error: ${{ matrix.experimental == true }}
+    steps:
+      - uses: styfle/cancel-workflow-action@0.11.0
+
+      - uses: actions/checkout@v3
+
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+
+      - name: Setup Node.js (.nvmrc)
+        uses: actions/setup-node@v3
+        with:
+          node-version-file: '.nvmrc'
+          cache: npm
+
+      - name: npm install
+        run: npm ci
+
+      - name: Install WordPress
+        run: npm run wp-env start
+
+      - name: Running PHPUnit tests
+        run: npm run test-php
+
+      - name: Running PHPUnit tests for multisite
+        run: npm run test-php-multisite