diff --git a/.eslintignore b/.eslintignore
deleted file mode 100644
index fdecad08..00000000
--- a/.eslintignore
+++ /dev/null
@@ -1,7 +0,0 @@
-browser.d.ts
-coverage
-lib
-node_modules
-sandbox
-types
-tmp
diff --git a/.eslintrc.js b/.eslintrc.js
deleted file mode 100644
index 34a3724f..00000000
--- a/.eslintrc.js
+++ /dev/null
@@ -1,42 +0,0 @@
-module.exports = {
-  root: true,
-  env: {
-    browser: true,
-    node: true,
-  },
-  parserOptions: {
-    ecmaVersion: 'latest',
-  },
-  extends: ['eslint:recommended', 'plugin:import-x/recommended', 'prettier'],
-  rules: {
-    'import-x/order': ['error', { alphabetize: { order: 'asc' } }],
-  },
-  settings: {
-    'import-x/resolver': {
-      node: true,
-    },
-  },
-  overrides: [
-    {
-      files: ['**/*.ts', '**/*.tsx'],
-      parser: '@typescript-eslint/parser',
-      plugins: ['@typescript-eslint'],
-      extends: [
-        'plugin:@typescript-eslint/recommended',
-        'plugin:import-x/typescript',
-        'prettier',
-      ],
-      settings: {
-        'import-x/resolver': {
-          typescript: true,
-          node: true,
-        },
-      },
-      rules: {
-        '@typescript-eslint/no-explicit-any': 'off',
-        '@typescript-eslint/explicit-function-return-type': 'off',
-        '@typescript-eslint/explicit-module-boundary-types': 'off',
-      },
-    },
-  ],
-}
diff --git a/eslint.config.mjs b/eslint.config.mjs
new file mode 100644
index 00000000..110d7473
--- /dev/null
+++ b/eslint.config.mjs
@@ -0,0 +1,60 @@
+import js from '@eslint/js'
+import eslintConfigPrettier from 'eslint-config-prettier'
+import eslintPluginImportX from 'eslint-plugin-import-x'
+import eslintPluginJest from 'eslint-plugin-jest'
+import globals from 'globals'
+import tseslint from 'typescript-eslint'
+
+const tsFiles = ['**/*.ts', '**/*.tsx', '**/*.mts', '**/*.cts']
+const testFiles = ['test/**']
+const forFiles = (files, confs) => confs.map((conf) => ({ ...conf, files }))
+
+export default tseslint.config(
+  js.configs.recommended,
+  eslintPluginImportX.flatConfigs.recommended,
+  ...forFiles(tsFiles, [
+    ...tseslint.configs.recommended,
+    eslintPluginImportX.flatConfigs.typescript,
+    {
+      rules: {
+        '@typescript-eslint/no-explicit-any': 'off',
+        '@typescript-eslint/explicit-function-return-type': 'off',
+        '@typescript-eslint/explicit-module-boundary-types': 'off',
+      },
+    },
+  ]),
+  ...forFiles(testFiles, [
+    eslintPluginJest.configs['flat/recommended'],
+    eslintPluginJest.configs['flat/style'],
+  ]),
+  eslintConfigPrettier,
+  {
+    linterOptions: {
+      reportUnusedDisableDirectives: 'error',
+    },
+    languageOptions: {
+      ecmaVersion: 'latest',
+      globals: {
+        ...globals.node,
+        ...globals.browser,
+      },
+    },
+    rules: {
+      'import-x/order': ['error', { alphabetize: { order: 'asc' } }],
+    },
+    settings: {
+      'import-x/resolver': 'typescript',
+    },
+  },
+  {
+    ignores: [
+      'browser.d.ts',
+      'coverage/**/*',
+      'lib/**/*',
+      'node_modules/**/*',
+      'sandbox/**/*',
+      'tmp/**/*',
+      'types/**/*',
+    ],
+  },
+)
diff --git a/package-lock.json b/package-lock.json
index 9c85e483..22aa737f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -29,19 +29,19 @@
         "@tsconfig/node20": "^20.1.4",
         "@tsconfig/recommended": "^1.0.7",
         "@twemoji/api": "^15.1.0",
+        "@types/eslint__js": "^8.42.3",
         "@types/jest": "^29.5.12",
-        "@typescript-eslint/eslint-plugin": "^8.3.0",
-        "@typescript-eslint/parser": "^8.3.0",
         "autoprefixer": "^10.4.20",
         "cheerio": "^1.0.0",
         "cssnano": "^7.0.5",
         "emoji-regex": "10.3.0",
-        "eslint": "^9.9.1",
+        "eslint": "^9.10.0",
         "eslint-config-prettier": "^9.1.0",
         "eslint-import-resolver-typescript": "^3.6.3",
-        "eslint-plugin-import-x": "^4.1.1",
-        "eslint-plugin-jest": "^28.8.1",
+        "eslint-plugin-import-x": "^4.2.1",
+        "eslint-plugin-jest": "^28.8.3",
         "github-markdown-css": "^5.6.1",
+        "globals": "^15.9.0",
         "jest": "^29.7.0",
         "jest-environment-jsdom": "^29.7.0",
         "jest-junit": "^16.0.0",
@@ -65,7 +65,8 @@
         "stylelint-config-standard-scss": "^13.1.0",
         "ts-jest": "29.2.5",
         "tslib": "^2.7.0",
-        "typescript": "^5.5.4"
+        "typescript": "^5.5.4",
+        "typescript-eslint": "^8.4.0"
       },
       "engines": {
         "node": ">=18"
@@ -983,6 +984,19 @@
         "concat-map": "0.0.1"
       }
     },
+    "node_modules/@eslint/eslintrc/node_modules/globals": {
+      "version": "14.0.0",
+      "resolved": "https://registry.npmjs.org/globals/-/globals-14.0.0.tgz",
+      "integrity": "sha512-oahGvuMGQlPw/ivIYBjVSrWAfWLBeku5tpPE2fOPLi+WHffIWbuh2tCjhyQhTBPMf5E9jDEH4FOmTYgYwbKwtQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/@eslint/eslintrc/node_modules/minimatch": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
@@ -997,9 +1011,9 @@
       }
     },
     "node_modules/@eslint/js": {
-      "version": "9.9.1",
-      "resolved": "https://registry.npmjs.org/@eslint/js/-/js-9.9.1.tgz",
-      "integrity": "sha512-xIDQRsfg5hNBqHz04H1R3scSVwmI+KUbqjsQKHKQ1DAUSaUjYPReZZmS/5PNiKu1fUvzDd6H7DEDKACSEhu+TQ==",
+      "version": "9.10.0",
+      "resolved": "https://registry.npmjs.org/@eslint/js/-/js-9.10.0.tgz",
+      "integrity": "sha512-fuXtbiP5GWIn8Fz+LWoOMVf/Jxm+aajZYkhi6CuEm4SxymFM+eUWzbO9qXT+L0iCkL5+KGYMCSGxo686H19S1g==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -1016,6 +1030,19 @@
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       }
     },
+    "node_modules/@eslint/plugin-kit": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/@eslint/plugin-kit/-/plugin-kit-0.1.0.tgz",
+      "integrity": "sha512-autAXT203ixhqei9xt+qkYOvY8l6LAFIdT2UXc/RPNeUVfqRF1BV94GTJyVPFKT8nFM6MyVJhjLj9E8JWvf5zQ==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "levn": "^0.4.1"
+      },
+      "engines": {
+        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
+      }
+    },
     "node_modules/@humanwhocodes/module-importer": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/@humanwhocodes/module-importer/-/module-importer-1.0.1.tgz",
@@ -2118,6 +2145,27 @@
         "@babel/types": "^7.20.7"
       }
     },
+    "node_modules/@types/eslint": {
+      "version": "9.6.1",
+      "resolved": "https://registry.npmjs.org/@types/eslint/-/eslint-9.6.1.tgz",
+      "integrity": "sha512-FXx2pKgId/WyYo2jXw63kk7/+TY7u7AziEJxJAnSFzHlqTAS3Ync6SvgYAN/k4/PQpnnVuzoMuVnByKK2qp0ag==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/estree": "*",
+        "@types/json-schema": "*"
+      }
+    },
+    "node_modules/@types/eslint__js": {
+      "version": "8.42.3",
+      "resolved": "https://registry.npmjs.org/@types/eslint__js/-/eslint__js-8.42.3.tgz",
+      "integrity": "sha512-alfG737uhmPdnvkrLdZLcEKJ/B8s9Y4hrZ+YAdzUeoArBlSUERA2E87ROfOaS4jd/C45fzOoZzidLc1IPwLqOw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/eslint": "*"
+      }
+    },
     "node_modules/@types/estree": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.5.tgz",
@@ -2185,6 +2233,13 @@
         "parse5": "^7.0.0"
       }
     },
+    "node_modules/@types/json-schema": {
+      "version": "7.0.15",
+      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.15.tgz",
+      "integrity": "sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/node": {
       "version": "22.5.1",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-22.5.1.tgz",
@@ -2234,17 +2289,17 @@
       "license": "MIT"
     },
     "node_modules/@typescript-eslint/eslint-plugin": {
-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.3.0.tgz",
-      "integrity": "sha512-FLAIn63G5KH+adZosDYiutqkOkYEx0nvcwNNfJAf+c7Ae/H35qWwTYvPZUKFj5AS+WfHG/WJJfWnDnyNUlp8UA==",
+      "version": "8.4.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.4.0.tgz",
+      "integrity": "sha512-rg8LGdv7ri3oAlenMACk9e+AR4wUV0yrrG+XKsGKOK0EVgeEDqurkXMPILG2836fW4ibokTB5v4b6Z9+GYQDEw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@eslint-community/regexpp": "^4.10.0",
-        "@typescript-eslint/scope-manager": "8.3.0",
-        "@typescript-eslint/type-utils": "8.3.0",
-        "@typescript-eslint/utils": "8.3.0",
-        "@typescript-eslint/visitor-keys": "8.3.0",
+        "@typescript-eslint/scope-manager": "8.4.0",
+        "@typescript-eslint/type-utils": "8.4.0",
+        "@typescript-eslint/utils": "8.4.0",
+        "@typescript-eslint/visitor-keys": "8.4.0",
         "graphemer": "^1.4.0",
         "ignore": "^5.3.1",
         "natural-compare": "^1.4.0",
@@ -2268,16 +2323,16 @@
       }
     },
     "node_modules/@typescript-eslint/parser": {
-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-8.3.0.tgz",
-      "integrity": "sha512-h53RhVyLu6AtpUzVCYLPhZGL5jzTD9fZL+SYf/+hYOx2bDkyQXztXSc4tbvKYHzfMXExMLiL9CWqJmVz6+78IQ==",
+      "version": "8.4.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-8.4.0.tgz",
+      "integrity": "sha512-NHgWmKSgJk5K9N16GIhQ4jSobBoJwrmURaLErad0qlLjrpP5bECYg+wxVTGlGZmJbU03jj/dfnb6V9bw+5icsA==",
       "dev": true,
       "license": "BSD-2-Clause",
       "dependencies": {
-        "@typescript-eslint/scope-manager": "8.3.0",
-        "@typescript-eslint/types": "8.3.0",
-        "@typescript-eslint/typescript-estree": "8.3.0",
-        "@typescript-eslint/visitor-keys": "8.3.0",
+        "@typescript-eslint/scope-manager": "8.4.0",
+        "@typescript-eslint/types": "8.4.0",
+        "@typescript-eslint/typescript-estree": "8.4.0",
+        "@typescript-eslint/visitor-keys": "8.4.0",
         "debug": "^4.3.4"
       },
       "engines": {
@@ -2297,14 +2352,14 @@
       }
     },
     "node_modules/@typescript-eslint/scope-manager": {
-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-8.3.0.tgz",
-      "integrity": "sha512-mz2X8WcN2nVu5Hodku+IR8GgCOl4C0G/Z1ruaWN4dgec64kDBabuXyPAr+/RgJtumv8EEkqIzf3X2U5DUKB2eg==",
+      "version": "8.4.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-8.4.0.tgz",
+      "integrity": "sha512-n2jFxLeY0JmKfUqy3P70rs6vdoPjHK8P/w+zJcV3fk0b0BwRXC/zxRTEnAsgYT7MwdQDt/ZEbtdzdVC+hcpF0A==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/types": "8.3.0",
-        "@typescript-eslint/visitor-keys": "8.3.0"
+        "@typescript-eslint/types": "8.4.0",
+        "@typescript-eslint/visitor-keys": "8.4.0"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -2315,14 +2370,14 @@
       }
     },
     "node_modules/@typescript-eslint/type-utils": {
-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/type-utils/-/type-utils-8.3.0.tgz",
-      "integrity": "sha512-wrV6qh//nLbfXZQoj32EXKmwHf4b7L+xXLrP3FZ0GOUU72gSvLjeWUl5J5Ue5IwRxIV1TfF73j/eaBapxx99Lg==",
+      "version": "8.4.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/type-utils/-/type-utils-8.4.0.tgz",
+      "integrity": "sha512-pu2PAmNrl9KX6TtirVOrbLPLwDmASpZhK/XU7WvoKoCUkdtq9zF7qQ7gna0GBZFN0hci0vHaSusiL2WpsQk37A==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/typescript-estree": "8.3.0",
-        "@typescript-eslint/utils": "8.3.0",
+        "@typescript-eslint/typescript-estree": "8.4.0",
+        "@typescript-eslint/utils": "8.4.0",
         "debug": "^4.3.4",
         "ts-api-utils": "^1.3.0"
       },
@@ -2340,9 +2395,9 @@
       }
     },
     "node_modules/@typescript-eslint/types": {
-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-8.3.0.tgz",
-      "integrity": "sha512-y6sSEeK+facMaAyixM36dQ5NVXTnKWunfD1Ft4xraYqxP0lC0POJmIaL/mw72CUMqjY9qfyVfXafMeaUj0noWw==",
+      "version": "8.4.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-8.4.0.tgz",
+      "integrity": "sha512-T1RB3KQdskh9t3v/qv7niK6P8yvn7ja1mS7QK7XfRVL6wtZ8/mFs/FHf4fKvTA0rKnqnYxl/uHFNbnEt0phgbw==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -2354,14 +2409,14 @@
       }
     },
     "node_modules/@typescript-eslint/typescript-estree": {
-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-8.3.0.tgz",
-      "integrity": "sha512-Mq7FTHl0R36EmWlCJWojIC1qn/ZWo2YiWYc1XVtasJ7FIgjo0MVv9rZWXEE7IK2CGrtwe1dVOxWwqXUdNgfRCA==",
+      "version": "8.4.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-8.4.0.tgz",
+      "integrity": "sha512-kJ2OIP4dQw5gdI4uXsaxUZHRwWAGpREJ9Zq6D5L0BweyOrWsL6Sz0YcAZGWhvKnH7fm1J5YFE1JrQL0c9dd53A==",
       "dev": true,
       "license": "BSD-2-Clause",
       "dependencies": {
-        "@typescript-eslint/types": "8.3.0",
-        "@typescript-eslint/visitor-keys": "8.3.0",
+        "@typescript-eslint/types": "8.4.0",
+        "@typescript-eslint/visitor-keys": "8.4.0",
         "debug": "^4.3.4",
         "fast-glob": "^3.3.2",
         "is-glob": "^4.0.3",
@@ -2383,16 +2438,16 @@
       }
     },
     "node_modules/@typescript-eslint/utils": {
-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-8.3.0.tgz",
-      "integrity": "sha512-F77WwqxIi/qGkIGOGXNBLV7nykwfjLsdauRB/DOFPdv6LTF3BHHkBpq81/b5iMPSF055oO2BiivDJV4ChvNtXA==",
+      "version": "8.4.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-8.4.0.tgz",
+      "integrity": "sha512-swULW8n1IKLjRAgciCkTCafyTHHfwVQFt8DovmaF69sKbOxTSFMmIZaSHjqO9i/RV0wIblaawhzvtva8Nmm7lQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.4.0",
-        "@typescript-eslint/scope-manager": "8.3.0",
-        "@typescript-eslint/types": "8.3.0",
-        "@typescript-eslint/typescript-estree": "8.3.0"
+        "@typescript-eslint/scope-manager": "8.4.0",
+        "@typescript-eslint/types": "8.4.0",
+        "@typescript-eslint/typescript-estree": "8.4.0"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -2406,13 +2461,13 @@
       }
     },
     "node_modules/@typescript-eslint/visitor-keys": {
-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-8.3.0.tgz",
-      "integrity": "sha512-RmZwrTbQ9QveF15m/Cl28n0LXD6ea2CjkhH5rQ55ewz3H24w+AMCJHPVYaZ8/0HoG8Z3cLLFFycRXxeO2tz9FA==",
+      "version": "8.4.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-8.4.0.tgz",
+      "integrity": "sha512-zTQD6WLNTre1hj5wp09nBIDiOc2U5r/qmzo7wxPn4ZgAjHql09EofqhF9WF+fZHzL5aCyaIpPcT2hyxl73kr9A==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/types": "8.3.0",
+        "@typescript-eslint/types": "8.4.0",
         "eslint-visitor-keys": "^3.4.3"
       },
       "engines": {
@@ -3899,9 +3954,9 @@
       }
     },
     "node_modules/eslint": {
-      "version": "9.9.1",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-9.9.1.tgz",
-      "integrity": "sha512-dHvhrbfr4xFQ9/dq+jcVneZMyRYLjggWjk6RVsIiHsP8Rz6yZ8LvZ//iU4TrZF+SXWG+JkNF2OyiZRvzgRDqMg==",
+      "version": "9.10.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-9.10.0.tgz",
+      "integrity": "sha512-Y4D0IgtBZfOcOUAIQTSXBKoNGfY0REGqHJG6+Q81vNippW5YlKjHFj4soMxamKK1NXHUWuBZTLdU3Km+L/pcHw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -3909,7 +3964,8 @@
         "@eslint-community/regexpp": "^4.11.0",
         "@eslint/config-array": "^0.18.0",
         "@eslint/eslintrc": "^3.1.0",
-        "@eslint/js": "9.9.1",
+        "@eslint/js": "9.10.0",
+        "@eslint/plugin-kit": "^0.1.0",
         "@humanwhocodes/module-importer": "^1.0.1",
         "@humanwhocodes/retry": "^0.3.0",
         "@nodelib/fs.walk": "^1.2.8",
@@ -3932,7 +3988,6 @@
         "is-glob": "^4.0.0",
         "is-path-inside": "^3.0.3",
         "json-stable-stringify-without-jsonify": "^1.0.1",
-        "levn": "^0.4.1",
         "lodash.merge": "^4.6.2",
         "minimatch": "^3.1.2",
         "natural-compare": "^1.4.0",
@@ -4058,13 +4113,12 @@
       }
     },
     "node_modules/eslint-plugin-import-x": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-import-x/-/eslint-plugin-import-x-4.1.1.tgz",
-      "integrity": "sha512-dBEM8fACIFNt4H7GoOaRmnH6evJW6JSTJTYYgmRd3vI4geBTjgDM/JyUDKUwIw0HDSyI+u7Vs3vFRXUo/BOAtA==",
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-import-x/-/eslint-plugin-import-x-4.2.1.tgz",
+      "integrity": "sha512-WWi2GedccIJa0zXxx3WDnTgouGQTtdYK1nhXMwywbqqAgB0Ov+p1pYBsWh3VaB0bvBOwLse6OfVII7jZD9xo5Q==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/typescript-estree": "^8.1.0",
         "@typescript-eslint/utils": "^8.1.0",
         "debug": "^4.3.4",
         "doctrine": "^3.0.0",
@@ -4084,9 +4138,9 @@
       }
     },
     "node_modules/eslint-plugin-jest": {
-      "version": "28.8.1",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-jest/-/eslint-plugin-jest-28.8.1.tgz",
-      "integrity": "sha512-G46XMyYu6PtSNJUkQ0hsPjzXYpzq/O4vpCciMizTKRJG8kNsRreGoMRDG6H9FIB/xVgfFuclVnuX4XRvFUzrZQ==",
+      "version": "28.8.3",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-jest/-/eslint-plugin-jest-28.8.3.tgz",
+      "integrity": "sha512-HIQ3t9hASLKm2IhIOqnu+ifw7uLZkIlR7RYNv7fMcEi/p0CIiJmfriStQS2LDkgtY4nyLbIZAD+JL347Yc2ETQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -4786,9 +4840,9 @@
       }
     },
     "node_modules/globals": {
-      "version": "14.0.0",
-      "resolved": "https://registry.npmjs.org/globals/-/globals-14.0.0.tgz",
-      "integrity": "sha512-oahGvuMGQlPw/ivIYBjVSrWAfWLBeku5tpPE2fOPLi+WHffIWbuh2tCjhyQhTBPMf5E9jDEH4FOmTYgYwbKwtQ==",
+      "version": "15.9.0",
+      "resolved": "https://registry.npmjs.org/globals/-/globals-15.9.0.tgz",
+      "integrity": "sha512-SmSKyLLKFbSr6rptvP8izbyxJL4ILwqO9Jg23UA0sDlGlu58V59D1//I3vlc0KJphVdUR7vMjHIplYnzBxorQA==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -10709,6 +10763,30 @@
         "node": ">=14.17"
       }
     },
+    "node_modules/typescript-eslint": {
+      "version": "8.4.0",
+      "resolved": "https://registry.npmjs.org/typescript-eslint/-/typescript-eslint-8.4.0.tgz",
+      "integrity": "sha512-67qoc3zQZe3CAkO0ua17+7aCLI0dU+sSQd1eKPGq06QE4rfQjstVXR6woHO5qQvGUa550NfGckT4tzh3b3c8Pw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@typescript-eslint/eslint-plugin": "8.4.0",
+        "@typescript-eslint/parser": "8.4.0",
+        "@typescript-eslint/utils": "8.4.0"
+      },
+      "engines": {
+        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/typescript-eslint"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/uc.micro": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/uc.micro/-/uc.micro-2.1.0.tgz",
diff --git a/package.json b/package.json
index 4a5a73b1..08ac90a1 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "clean": "rimraf lib",
     "format": "prettier \"**/*.{css,js,json,md,mjs,scss,ts,yaml,yml}\"",
     "format:write": "npm -s run format -- --write",
-    "lint:js": "ESLINT_USE_FLAT_CONFIG=false eslint --ext .js,.mjs,.ts --report-unused-disable-directives --cache .",
+    "lint:js": "eslint --cache",
     "lint:css": "stylelint \"{src,themes}/**/*.{css,scss}\"",
     "prepack": "npm-run-all --parallel check:* lint:* test:coverage --parallel build types",
     "preversion": "run-p check:* lint:* test:coverage",
@@ -75,19 +75,19 @@
     "@tsconfig/node20": "^20.1.4",
     "@tsconfig/recommended": "^1.0.7",
     "@twemoji/api": "^15.1.0",
+    "@types/eslint__js": "^8.42.3",
     "@types/jest": "^29.5.12",
-    "@typescript-eslint/eslint-plugin": "^8.3.0",
-    "@typescript-eslint/parser": "^8.3.0",
     "autoprefixer": "^10.4.20",
     "cheerio": "^1.0.0",
     "cssnano": "^7.0.5",
     "emoji-regex": "10.3.0",
-    "eslint": "^9.9.1",
+    "eslint": "^9.10.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-import-resolver-typescript": "^3.6.3",
-    "eslint-plugin-import-x": "^4.1.1",
-    "eslint-plugin-jest": "^28.8.1",
+    "eslint-plugin-import-x": "^4.2.1",
+    "eslint-plugin-jest": "^28.8.3",
     "github-markdown-css": "^5.6.1",
+    "globals": "^15.9.0",
     "jest": "^29.7.0",
     "jest-environment-jsdom": "^29.7.0",
     "jest-junit": "^16.0.0",
@@ -111,7 +111,8 @@
     "stylelint-config-standard-scss": "^13.1.0",
     "ts-jest": "29.2.5",
     "tslib": "^2.7.0",
-    "typescript": "^5.5.4"
+    "typescript": "^5.5.4",
+    "typescript-eslint": "^8.4.0"
   },
   "dependencies": {
     "@marp-team/marpit": "^3.1.1",
diff --git a/rollup.config.mjs b/rollup.config.mjs
index ab951ea5..3233fd79 100644
--- a/rollup.config.mjs
+++ b/rollup.config.mjs
@@ -12,7 +12,7 @@ import cssnano from 'cssnano'
 import postcssUrl from 'postcss-url'
 import postcss from 'rollup-plugin-postcss'
 import { string } from 'rollup-plugin-string'
-import postcssOptimizeDefaultTheme from './scripts/postcss-optimize-default-theme.mjs'
+import { postcssOptimizeDefaultTheme } from './scripts/postcss-optimize-default-theme.mjs' // eslint-disable-line import-x/namespace -- false positive?
 
 const require = createRequire(import.meta.url)
 const pkg = require('./package.json')
diff --git a/scripts/browser.js b/scripts/browser.js
index 314193cd..05aaa7f3 100644
--- a/scripts/browser.js
+++ b/scripts/browser.js
@@ -1,4 +1,4 @@
-import { browser } from '../src/browser' /* eslint-disable-line import-x/no-unresolved */
+import { browser } from '../src/browser'  
 
 const script = document.currentScript
 
diff --git a/scripts/postcss-optimize-default-theme.mjs b/scripts/postcss-optimize-default-theme.mjs
index 4872a144..8fa9f245 100644
--- a/scripts/postcss-optimize-default-theme.mjs
+++ b/scripts/postcss-optimize-default-theme.mjs
@@ -3,7 +3,7 @@ import postcssSelectorParser from 'postcss-selector-parser'
 const defaultThemeMatcher = /@theme +default/
 const colorThemeMatcher = /prefers-color-scheme:\s+(light|dark)/i
 
-const plugin = () => {
+export const postcssOptimizeDefaultTheme = () => {
   let shouldProcess = false
 
   return {
@@ -57,6 +57,4 @@ const plugin = () => {
   }
 }
 
-plugin.postcss = true
-
-export default plugin
+postcssOptimizeDefaultTheme.postcss = true
diff --git a/test/.eslintrc.js b/test/.eslintrc.js
deleted file mode 100644
index fd08d52a..00000000
--- a/test/.eslintrc.js
+++ /dev/null
@@ -1,4 +0,0 @@
-module.exports = {
-  plugins: ['jest'],
-  extends: ['plugin:jest/recommended', 'plugin:jest/style'],
-}
diff --git a/tsconfig.json b/tsconfig.json
index 6f34896e..74f2743d 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,8 +1,5 @@
 {
-  "extends": [
-    "@tsconfig/recommended/tsconfig.json",
-    "@tsconfig/node20/tsconfig.json"
-  ],
+  "extends": ["@tsconfig/recommended/tsconfig", "@tsconfig/node20/tsconfig"],
   "compilerOptions": {
     "noImplicitAny": false,
     "resolveJsonModule": true,