Expand linting configuration

.eslintrc.yml

@@ -0,0 +1,37 @@
+---
+root: true
+
+parser: "@typescript-eslint/parser"
+
+plugins:
+    - "unused-imports"
+
+extends:
+    - "eslint:recommended"
+    - "plugin:@typescript-eslint/eslint-recommended"
+    - "plugin:@typescript-eslint/recommended"
+    - "prettier"
+    - "plugin:jest/recommended"
+    - "plugin:security-node/recommended"
+    - "plugin:promise/recommended"
+    - "plugin:import/recommended"
+    - "plugin:jsx-a11y/recommended"
+
+settings:
+    import/resolver:
+        typescript: true
+        node: true
+
+rules:
+    # Our tests rely frequently on assertions defined in external file.
+    "jest/expect-expect": "off"
+    # Consistent import order and spacing of imports.
+    "import/order":
+        - "error"
+        - "newlines-between": "always-and-inside-groups"
+    "unused-imports/no-unused-imports": "error"
+    "unused-imports/no-unused-vars": "warn"
+
+env:
+    browser: true
+    node: true

CONTRIBUTING.md

@@ -49,12 +49,6 @@ Tested using [Jest](https://jestjs.io/), using test cases defined in the `src/`
 make test
 ```
 
-Our test suite contains the following kinds of tests:
-
--   **Unit** - Does each unit of code perform its intended purpose, and do we handle potential error cases correctly.
--   **Integration** - Can our plugin be loaded into PostCSS and then executed correctly.
--   **Acceptance** - Does our plugin perform the correct operations based on provided configuration.
-
 ## Publishing
 
 [![NPM Downloads Per Week](https://img.shields.io/npm/dw/postcss-prefixwrap?color=blue&logo=npm&style=for-the-badge)](https://www.npmjs.com/package/postcss-prefixwrap)

package.json

@@ -29,14 +29,15 @@
   "scripts": {
     "build": "tsc --build tsconfig.app.json",
     "clean": "node automation-clean.js",
-    "format": "sort-package-json && prettier . --write && pnpm eslint --fix . --ext .js,.ts",
-    "lint": "sort-package-json --check && prettier . --check && pnpm eslint . --ext .js,.ts",
+    "format": "sort-package-json && prettier . --write && eslint --fix . --ext .js,.ts",
+    "lint": "sort-package-json --check && prettier . --check && eslint . --ext .js,.ts",
     "prepare": "husky install",
     "test": "jest"
   },
   "devDependencies": {
     "@babel/core": "7.23.5",
     "@jest/globals": "29.7.0",
+    "@tsconfig/node18": "18.2.2",
     "@types/jest": "29.5.10",
     "@types/node": "20.10.3",
     "@typescript-eslint/eslint-plugin": "6.13.2",
@@ -46,8 +47,10 @@
     "eslint-import-resolver-typescript": "3.6.1",
     "eslint-plugin-import": "2.29.0",
     "eslint-plugin-jest": "27.6.0",
+    "eslint-plugin-jsx-a11y": "6.8.0",
     "eslint-plugin-promise": "6.1.1",
     "eslint-plugin-security-node": "1.1.1",
+    "eslint-plugin-unused-imports": "3.0.0",
     "glob": "10.3.10",
     "husky": "8.0.3",
     "jest": "29.7.0",