Update to eslint 9

Author: zoontek

.eslintignore

@@ -0,0 +1,69 @@
+import js from "@eslint/js";
+import reactHooks from "eslint-plugin-react-hooks";
+import ts from "typescript-eslint";
+
+const typescriptRules = [
+  ts.configs.eslintRecommended,
+  ...ts.configs.recommended,
+]
+  .map((config) => config.rules)
+  .reduce((acc, rules) => ({ ...acc, ...rules }), {});
+
+/** @type {import("eslint").Linter.Config[]} */
+export default [
+  {
+    ignores: ["dist/**", "docs/**"],
+  },
+  {
+    files: ["src/**/*.ts", "src/**/*.tsx"],
+
+    plugins: {
+      "@typescript-eslint": ts.plugin,
+      "react-hooks": reactHooks,
+    },
+
+    languageOptions: {
+      sourceType: "module",
+      parser: ts.parser,
+
+      parserOptions: {
+        tsconfigRootDir: import.meta.dirname,
+        projectService: true,
+      },
+    },
+
+    rules: {
+      ...js.configs.recommended.rules,
+      ...typescriptRules,
+
+      curly: "error",
+      "no-implicit-coercion": "error",
+      "no-param-reassign": "error",
+      "object-shorthand": "error",
+
+      "react-hooks/rules-of-hooks": "error",
+      "react-hooks/exhaustive-deps": "warn",
+
+      "@typescript-eslint/ban-ts-comment": [
+        "error",
+        { "ts-check": true, "ts-expect-error": false },
+      ],
+      "@typescript-eslint/no-unused-vars": [
+        "error",
+        { argsIgnorePattern: "^_", ignoreRestSiblings: true },
+      ],
+
+      "@typescript-eslint/consistent-type-definitions": ["error", "type"],
+      "@typescript-eslint/no-base-to-string": "error",
+      "@typescript-eslint/no-explicit-any": "error",
+      "@typescript-eslint/no-non-null-assertion": "error",
+      "@typescript-eslint/no-unnecessary-boolean-literal-compare": "error",
+      "@typescript-eslint/no-unnecessary-condition": "error",
+      "@typescript-eslint/no-unnecessary-qualifier": "error",
+      "@typescript-eslint/no-unnecessary-type-arguments": "error",
+      "@typescript-eslint/prefer-nullish-coalescing": "error",
+      "@typescript-eslint/prefer-optional-chain": "error",
+      "@typescript-eslint/strict-boolean-expressions": "error",
+    },
+  },
+];

.eslintrc.js

@@ -10,13 +10,13 @@
     "@swan-io/chicane": "workspace:*",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
-    "ts-pattern": "^5.2.0"
+    "ts-pattern": "^5.9.0"
   },
   "devDependencies": {
     "@types/react": "^18.3.3",
     "@types/react-dom": "^18.3.0",
-    "@vitejs/plugin-react-swc": "^3.7.0",
-    "typescript": "^5.5.3",
-    "vite": "^5.3.4"
+    "@vitejs/plugin-react-swc": "^4.2.1",
+    "typescript": "^5.9.3",
+    "vite": "^7.2.2"
   }
 }

eslint.config.mjs

@@ -2,7 +2,7 @@
   "name": "@swan-io/chicane",
   "version": "2.2.1",
   "license": "MIT",
-  "packageManager": "pnpm@10.12.1",
+  "packageManager": "pnpm@10.21.0",
   "description": "A simple and safe router for React and TypeScript",
   "author": "Mathieu Acthernoene <[email protected]>",
   "homepage": "https://swan-io.github.io/chicane",
@@ -30,7 +30,7 @@
   "scripts": {
     "clean": "rm -rf dist",
     "format": "prettier '**/*' --ignore-unknown --write",
-    "lint": "eslint --ext ts,tsx ./src",
+    "lint": "eslint",
     "test": "vitest --run",
     "test:watch": "vitest --watch",
     "typecheck": "tsc --noEmit",
@@ -47,26 +47,26 @@
   },
   "dependencies": {
     "@emotion/hash": "^0.9.2",
-    "use-sync-external-store": "^1.2.2"
+    "use-sync-external-store": "^1.5.0"
   },
   "devDependencies": {
-    "@testing-library/dom": "^10.4.0",
-    "@testing-library/react": "^16.0.0",
-    "@types/node": "^20.14.11",
-    "@types/react": "^18.3.3",
-    "@types/react-dom": "^18.3.0",
-    "@types/use-sync-external-store": "^0.0.6",
-    "@typescript-eslint/eslint-plugin": "^7.16.1",
-    "@typescript-eslint/parser": "^7.16.1",
-    "eslint": "^8.57.0",
-    "eslint-plugin-react-hooks": "^4.6.2",
-    "jsdom": "^24.1.1",
-    "prettier": "^3.3.3",
-    "prettier-plugin-organize-imports": "^4.0.0",
+    "@eslint/js": "^9.39.1",
+    "@testing-library/dom": "^10.4.1",
+    "@testing-library/react": "^16.3.0",
+    "@types/node": "^20.19.24",
+    "@types/react": "^18.3.26",
+    "@types/react-dom": "^18.3.7",
+    "@types/use-sync-external-store": "^1.5.0",
+    "eslint": "^9.39.1",
+    "eslint-plugin-react-hooks": "^7.0.1",
+    "jsdom": "^27.1.0",
+    "prettier": "^3.6.2",
+    "prettier-plugin-organize-imports": "^4.3.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
-    "tsup": "^8.2.2",
-    "typescript": "^5.5.3",
-    "vitest": "^2.0.4"
+    "tsup": "^8.5.0",
+    "typescript": "^5.9.3",
+    "typescript-eslint": "^8.46.3",
+    "vitest": "^4.0.8"
   }
 }