chore(lint): migrate to eslint flat config

eslint.config.mjs

@@ -0,0 +1,62 @@
+import eslint from "@eslint/js";
+import tseslint from 'typescript-eslint';
+import reactPlugin from 'eslint-plugin-react';
+import reactRefresh from "eslint-plugin-react-refresh";
+import globals from "globals";
+import eslintConfigPrettier from "eslint-config-prettier";
+
+export default tseslint.config(
+    eslint.configs.recommended,
+    tseslint.configs.recommended,
+    // tseslint.configs.recommendedTypeChecked, // Add type checks.
+    {
+        languageOptions: {
+            globals: {
+                ...globals.serviceworker,
+                ...globals.browser,
+            },
+            parserOptions: {
+                projectService: true,
+                tsconfigRootDir: import.meta.dirname,
+            },
+        },
+    },
+    {
+        files: ['**/*.js'],
+        extends: [tseslint.configs.disableTypeChecked],
+    },
+    {
+        rules: {
+            '@typescript-eslint/ban-ts-comment': 'off',
+            '@typescript-eslint/explicit-function-return-type': 'off',
+            '@typescript-eslint/no-explicit-any': 'off',
+            '@typescript-eslint/no-unused-vars': 'off',
+            '@typescript-eslint/no-unused-expressions': 'off',
+            'no-case-declarations': 'off',
+            'no-prototype-builtins': 'off',
+        },
+    },
+    reactPlugin.configs.flat.recommended,
+    reactPlugin.configs.flat['jsx-runtime'],
+    {
+        settings: {
+            react: {
+                version: 'detect', // Tells eslint-plugin-react to automatically detect the version of React to use
+            },
+        },
+        rules: {
+            'react/no-deprecated': 'warn',
+            'react/prop-types': 'off',
+        },
+    },
+    {
+        files: ['**/*.{jsx,tsx}'],
+        plugins: {
+            "react-refresh": reactRefresh,
+        },
+        rules: {
+            'react-refresh/only-export-components': 'warn',
+        },
+    },
+    eslintConfigPrettier, // Avoid conflict with prettier.
+);

package.json

@@ -31,13 +31,14 @@
         "dist/*"
     ],
     "engines": {
-        "node": ">=18"
+        "node": ">=20.11"
     },
     "devDependencies": {
         "@codemirror/lang-javascript": "^6.2.2",
         "@commitlint/cli": "~17.8.0",
         "@commitlint/config-conventional": "~17.8.0",
         "@ebay/nice-modal-react": "~1.2.13",
+        "@eslint/js": "^9.18.0",
         "@fortawesome/fontawesome-free": "~6.6.0",
         "@rjsf/bootstrap-5": "https://github.com/nurikk/fileshare/blob/main/rjsf-bootstrap-5-4.2.0.tgz?raw=true",
         "@rjsf/core": "~4.2.3",
@@ -60,8 +61,6 @@
         "@types/react-transition-group": "~4.4.7",
         "@types/reconnectingwebsocket": "~1.0.8",
         "@types/ws": "~8.5.6",
-        "@typescript-eslint/eslint-plugin": "~6.7.4",
-        "@typescript-eslint/parser": "~6.7.4",
         "@uiw/codemirror-theme-github": "^4.21.24",
         "@uiw/react-codemirror": "^4.21.24",
         "@vitejs/plugin-react": "~4.3.0",
@@ -77,14 +76,13 @@
         "d3-zoom": "~3.0.0",
         "deep-diff": "~1.0.2",
         "deep-object-diff": "~1.1.9",
-        "eslint": "~8.57.0",
-        "eslint-config-prettier": "~9.1.0",
-        "eslint-config-react": "~1.1.7",
-        "eslint-plugin-prettier": "~5.0.0",
-        "eslint-plugin-react": "~7.33.2",
-        "eslint-plugin-react-refresh": "*",
+        "eslint": "~9.18.0",
+        "eslint-config-prettier": "~10.0.1",
+        "eslint-plugin-react": "~7.37.4",
+        "eslint-plugin-react-refresh": "~0.4.18",
         "events": "~3.3.0",
         "file-saver": "~2.0.5",
+        "globals": "~15.14.0",
         "husky": "~8.0.3",
         "i18next": "~23.5.1",
         "i18next-browser-languagedetector": "~7.1.0",
@@ -93,7 +91,7 @@
         "lodash": "~4.17.21",
         "notyf": "~3.10.0",
         "pinst": "~3.0.0",
-        "prettier": "~3.0.3",
+        "prettier": "~3.4.2",
         "react": "~18.2.0",
         "react-app-polyfill": "~3.0.0",
         "react-bootstrap": "~2.10.0",
@@ -110,6 +108,7 @@
         "store2": "^2.14.2",
         "timeago.js": "~4.0.2",
         "typescript": "~5.2.2",
+        "typescript-eslint": "^8.21.0",
         "unistore": "~3.5.2",
         "vite": "~4.5.0",
         "vite-plugin-compression": "~0.5.1",