feat: support typescript

declarations/ESLintError.d.ts

@@ -0,0 +1,4 @@
+export default class ESLintError extends Error {
+  constructor(messages: any);
+  stack: boolean;
+}

declarations/LintDirtyModulesPlugin.d.ts

@@ -0,0 +1,10 @@
+export default class LintDirtyModulesPlugin {
+  constructor(compiler: any, options: any);
+  compiler: any;
+  options: any;
+  startTime: number;
+  prevTimestamps: {};
+  isFirstRun: boolean;
+  apply(compilation: any, callback: any): void;
+  getChangedFiles(fileTimestamps: any, glob: any): any[];
+}

declarations/cjs.d.ts

@@ -0,0 +1,2 @@
+declare const _exports: typeof import('.').default;
+export = _exports;

declarations/getCLIEngine.d.ts

@@ -0,0 +1,8 @@
+export default function getCLIEngine(
+  options: any,
+  startCli?: boolean
+): {
+  eslintPath: any;
+  CLIEngine: any;
+  cli: any;
+};

declarations/getOptions.d.ts

@@ -0,0 +1 @@
+export default function getOptions(pluginOptions: any): any;

declarations/index.d.ts

@@ -0,0 +1,7 @@
+export default ESLintWebpackPlugin;
+declare class ESLintWebpackPlugin {
+  constructor(options?: {});
+  options: any;
+  apply(compiler: any): void;
+  getContext(compiler: any): any;
+}

declarations/linter.d.ts

@@ -0,0 +1,5 @@
+export default function linter(
+  options: any,
+  compiler: any,
+  callback: any
+): void;

lint-staged.config.js

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

package.json

@@ -8,18 +8,22 @@
   "homepage": "https://github.com/webpack-contrib/eslint-webpack-plugin",
   "bugs": "https://github.com/webpack-contrib/eslint-webpack-plugin/issues",
   "main": "dist/cjs.js",
+  "types": "declarations/index.d.ts",
   "engines": {
     "node": ">= 10.13.0"
   },
   "scripts": {
     "start": "npm run build -- -w",
-    "clean": "del-cli dist",
+    "clean": "del-cli dist declarations",
     "prebuild": "npm run clean",
-    "build": "cross-env NODE_ENV=production babel src -d dist --copy-files",
+    "build:types": "tsc --declaration --emitDeclarationOnly --outDir declarations && prettier \"declarations/**/*.ts\" --write",
+    "build:code": "cross-env NODE_ENV=production babel src -d dist --copy-files",
+    "build": "npm-run-all -p \"build:**\"",
     "commitlint": "commitlint --from=master",
     "security": "npm audit",
     "lint:prettier": "prettier --list-different .",
     "lint:js": "eslint --cache .",
+    "lint:types": "tsc --pretty --noEmit",
     "lint": "npm-run-all -l -p \"lint:**\"",
     "test:only": "cross-env NODE_ENV=test jest",
     "test:watch": "npm run test:only -- --watch",
@@ -31,7 +35,8 @@
     "defaults": "webpack-defaults"
   },
   "files": [
-    "dist"
+    "dist",
+    "declarations"
   ],
   "peerDependencies": {
     "eslint": "^6.0.0 || ^7.0.0",
@@ -67,6 +72,7 @@
     "npm-run-all": "^4.1.5",
     "prettier": "^2.0.5",
     "standard-version": "^7.1.0",
+    "typescript": "^3.8.3",
     "webpack": "^4.43.0"
   },
   "keywords": [

tsconfig.json

@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "target": "esnext",
+    "moduleResolution": "node",
+    "allowJs": true,
+    "checkJs": true,
+    "strict": true,
+    "types": ["node"],
+    "esModuleInterop": true,
+    "resolveJsonModule": true
+  },
+  "include": ["./types/**/*", "./src/**/*"]
+}