diff --git a/.github/workflows/nodejs-test.yml b/.github/workflows/nodejs-test.yml
index bb5e4cc4..79262bd9 100644
--- a/.github/workflows/nodejs-test.yml
+++ b/.github/workflows/nodejs-test.yml
@@ -36,6 +36,7 @@ jobs:
                     - 20
                     - 22
                     - 24
+                    - 26
                     - lts/*
 
         steps:
diff --git a/eslint.config.mjs b/eslint.config.mjs
index e4aa5d7b..944f128b 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -47,4 +47,10 @@ export default defineConfig([
         },
     },
     eslintConfigBiome,
+    {
+        rules: {
+            // This module uses parser DOM nodes, which do not implement browser traversal APIs.
+            "unicorn/better-dom-traversing": "off",
+        },
+    },
 ]);
diff --git a/package-lock.json b/package-lock.json
index 1b957b55..4980ec3d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -18,7 +18,7 @@
             "devDependencies": {
                 "@biomejs/biome": "^2.5.15",
                 "@eslint/compat": "^2.1.1",
-                "@feedic/eslint-config": "^0.4.1",
+                "@feedic/eslint-config": "^0.5.0",
                 "@types/node": "^26.6.4",
                 "eslint": "^10.12.0",
                 "eslint-config-biome": "^2.1.3",
@@ -37,16 +37,16 @@
             }
         },
         "node_modules/@altano/repository-tools": {
-            "version": "2.0.3",
-            "resolved": "https://registry.npmjs.org/@altano/repository-tools/-/repository-tools-2.0.3.tgz",
-            "integrity": "sha512-cSR/ZYDF6Wp9OeAJMyLYYN1GenAAhV17W+w38ELP+3c5Ltsy9jkkCymi33nz/qnXyef3n6Fbr1h2yt3dvUN5sQ==",
+            "version": "2.1.1",
+            "resolved": "https://registry.npmjs.org/@altano/repository-tools/-/repository-tools-2.1.1.tgz",
+            "integrity": "sha512-YFVhwoSjwkERQoopw3lX/TaPIDud0m6ac/Z51FoQ3YEPf0OaxFxpofbcHO0E2mTJ0lvmuRArIMUP9Pz2jpTMhg==",
             "dev": true,
             "license": "ISC"
         },
         "node_modules/@babel/helper-validator-identifier": {
-            "version": "7.28.5",
-            "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.28.5.tgz",
-            "integrity": "sha512-qSs4ifwzKJSV39ucNjsvc6WVHs6b7S03sOh2OcHF9UHfVPqWWALUsNUVzhSBiItjRZoLHx7nIarVjqKVusUZ1Q==",
+            "version": "7.29.7",
+            "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.29.7.tgz",
+            "integrity": "sha512-qehxGkRj55h/ff8EMaJ+cYhyaKlHIxqYDn682wQD7RNp9UujOQsHog2uS0r2vzr4pW+sXf90NeeayjcNaX3fFg==",
             "dev": true,
             "license": "MIT",
             "engines": {
@@ -253,17 +253,17 @@
             }
         },
         "node_modules/@es-joy/jsdoccomment": {
-            "version": "0.86.0",
-            "resolved": "https://registry.npmjs.org/@es-joy/jsdoccomment/-/jsdoccomment-0.86.0.tgz",
-            "integrity": "sha512-ukZmRQ81WiTpDWO6D/cTBM7XbrNtutHKvAVnZN/8pldAwLoJArGOvkNyxPTBGsPjsoaQBJxlH+tE2TNA/92Qgw==",
+            "version": "0.91.0",
+            "resolved": "https://registry.npmjs.org/@es-joy/jsdoccomment/-/jsdoccomment-0.91.0.tgz",
+            "integrity": "sha512-vgqlMGNNhZxwDYbUNIHj3Hskb4R28iqdXx90ufHyt/NeuTQkeqjTDslAs9I0/GCAfbxP5BpH5WsL1R1fht5Lxg==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
-                "@types/estree": "^1.0.8",
-                "@typescript-eslint/types": "^8.58.0",
-                "comment-parser": "1.4.6",
+                "@types/estree": "^1.0.9",
+                "@typescript-eslint/types": "^8.65.0",
+                "comment-parser": "1.4.7",
                 "esquery": "^1.7.0",
-                "jsdoc-type-pratt-parser": "~7.2.0"
+                "jsdoc-type-pratt-parser": "~8.0.0"
             },
             "engines": {
                 "node": "^20.19.0 || ^22.13.0 || >=24"
@@ -429,18 +429,18 @@
             }
         },
         "node_modules/@feedic/eslint-config": {
-            "version": "0.4.1",
-            "resolved": "https://registry.npmjs.org/@feedic/eslint-config/-/eslint-config-0.4.1.tgz",
-            "integrity": "sha512-F6zETaaeGbsbHy8mqfQgVoNVIkneqd2NAtQkl4PSajVRcwTQ4D+UqrKVlF6yUpn6G0wudjS5gp5WloW+6hig/A==",
+            "version": "0.5.0",
+            "resolved": "https://registry.npmjs.org/@feedic/eslint-config/-/eslint-config-0.5.0.tgz",
+            "integrity": "sha512-j3rj0vDAGJ/FpgYKiHgrknWx2vEzdIvTcE6/jCWsYmCI8YV6Mpkn9gzpmkBsomQ4XgiDXD6nQeaz0m83I9oGog==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
                 "@eslint/js": "^10.0.1",
-                "eslint-plugin-jsdoc": "^62.9.0",
-                "eslint-plugin-n": "^17.24.0",
-                "eslint-plugin-package-json": "^0.91.2",
-                "eslint-plugin-unicorn": "^64.0.0",
-                "globals": "^17.6.0"
+                "eslint-plugin-jsdoc": "^63.0.7",
+                "eslint-plugin-n": "^18.1.0",
+                "eslint-plugin-package-json": "^1.5.0",
+                "eslint-plugin-unicorn": "^68.0.0",
+                "globals": "^17.7.0"
             },
             "engines": {
                 "node": ">=20.19.0"
@@ -913,9 +913,9 @@
             "license": "MIT"
         },
         "node_modules/@types/estree": {
-            "version": "1.0.8",
-            "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.8.tgz",
-            "integrity": "sha512-dWHzHa2WqEXI/O1E9OjrocMTKJl2mSrEolh1Iomrv6U+JuNwaHXsXx9bLu5gG7BUWFIN0skIQJQ/L1rIex4X6w==",
+            "version": "1.0.9",
+            "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.9.tgz",
+            "integrity": "sha512-GhdPgy1el4/ImP05X05Uw4cw2/M93BCUmnEvWZNStlCzEKME4Fkk+YpoA5OiHNQmoS7Cafb8Xa3Pya8m1Qrzeg==",
             "dev": true,
             "license": "MIT"
         },
@@ -1254,6 +1254,13 @@
                 "node": ">=14"
             }
         },
+        "node_modules/argparse": {
+            "version": "2.0.1",
+            "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
+            "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
+            "dev": true,
+            "license": "Python-2.0"
+        },
         "node_modules/assertion-error": {
             "version": "2.0.1",
             "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-2.0.1.tgz",
@@ -1275,9 +1282,9 @@
             }
         },
         "node_modules/baseline-browser-mapping": {
-            "version": "2.11.20",
-            "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.11.20.tgz",
-            "integrity": "sha512-H0ulySigv6icDJ1F7SjtdCD6PrhTpdYCmP0CactWy1+ekh0AFd0o1Wn5T8b+hnTmdBx19u9yhL6wvCylXMY7zw==",
+            "version": "2.11.28",
+            "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.11.28.tgz",
+            "integrity": "sha512-br0LOmjJqr6Rt4AEkadbcNf67Zpo7EPwKsWbjnRrJIa1QYFHQBqM4C7F2WTbV8ahTEcg1Eo+Y0aWjjORInYFyA==",
             "dev": true,
             "license": "Apache-2.0",
             "bin": {
@@ -1314,9 +1321,9 @@
             }
         },
         "node_modules/browserslist": {
-            "version": "4.28.8",
-            "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.28.8.tgz",
-            "integrity": "sha512-V2NpofLblG64mfOtSgDhOJESZEGogzDMBv/q+W6oc4LXWP/q75eOXoOaaOu1EOadB9U4Bwx/e0yzbvwKH8zalA==",
+            "version": "4.29.3",
+            "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.29.3.tgz",
+            "integrity": "sha512-1R4kiYKXGViqEN0CnoDrXc1StD9niAwu+j2dukWzrD4bJgsD4lDmEp0CRbc6E/vYJIfTHwPmwyaKtVSudICdPA==",
             "dev": true,
             "funding": [
                 {
@@ -1334,11 +1341,11 @@
             ],
             "license": "MIT",
             "dependencies": {
-                "baseline-browser-mapping": "^2.11.12",
-                "caniuse-lite": "^1.0.30001809",
-                "electron-to-chromium": "^1.5.402",
-                "node-releases": "^2.0.53",
-                "update-browserslist-db": "^1.3.0"
+                "baseline-browser-mapping": "^2.11.26",
+                "caniuse-lite": "^1.0.30001813",
+                "electron-to-chromium": "^1.5.439",
+                "node-releases": "^2.0.57",
+                "update-browserslist-db": "^1.3.3"
             },
             "bin": {
                 "browserslist": "cli.js"
@@ -1348,9 +1355,9 @@
             }
         },
         "node_modules/builtin-modules": {
-            "version": "5.1.0",
-            "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-5.1.0.tgz",
-            "integrity": "sha512-c5JxaDrzwRjq3WyJkI1AGR5xy6Gr6udlt7sQPbl09+3ckB+Zo2qqQ2KhCTBr7Q8dHB43bENGYEk4xddrFH/b7A==",
+            "version": "5.4.0",
+            "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-5.4.0.tgz",
+            "integrity": "sha512-JCWSCdun+4Ovd9BhM/Vtlmwb7oD6Wl4YiPRXXwhAuwlPhW1un/MKgXn7GZoFm53ginnoNzus69V8JWx0K393jg==",
             "dev": true,
             "license": "MIT",
             "engines": {
@@ -1375,9 +1382,9 @@
             }
         },
         "node_modules/caniuse-lite": {
-            "version": "1.0.30001810",
-            "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001810.tgz",
-            "integrity": "sha512-TITQPUkaz+aVk5GL6NhOdwk1aEaNTSDPsGFWrTuhKGtjTF70jL/Oht2W4c6rXUe5fu7Ie19VIahAXHIIiWWNeg==",
+            "version": "1.0.30001815",
+            "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001815.tgz",
+            "integrity": "sha512-uDybUEyfgbyJJ93J1vikTylBX31AkdVYeVPeffMQpf8XN7hSfr0oZOn4VFOIMNvtU5+rHvC5Udg2TgtJKHm23Q==",
             "dev": true,
             "funding": [
                 {
@@ -1428,33 +1435,10 @@
                 "node": ">=8"
             }
         },
-        "node_modules/clean-regexp": {
-            "version": "1.0.0",
-            "resolved": "https://registry.npmjs.org/clean-regexp/-/clean-regexp-1.0.0.tgz",
-            "integrity": "sha512-GfisEZEJvzKrmGWkvfhgzcz/BllN1USeqD2V6tg14OAOgaCD2Z/PUEuxnAZ/nPvmaHRG7a8y77p1T/IRQ4D1Hw==",
-            "dev": true,
-            "license": "MIT",
-            "dependencies": {
-                "escape-string-regexp": "^1.0.5"
-            },
-            "engines": {
-                "node": ">=4"
-            }
-        },
-        "node_modules/clean-regexp/node_modules/escape-string-regexp": {
-            "version": "1.0.5",
-            "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
-            "integrity": "sha512-vbRorB5FUQWvla16U8R/qgaFIya2qGzwDrNmCZuYKrbdSUMG6I1ZCGQRefkRVhuOkIGVne7BQ35DSfo1qvJqFg==",
-            "dev": true,
-            "license": "MIT",
-            "engines": {
-                "node": ">=0.8.0"
-            }
-        },
         "node_modules/comment-parser": {
-            "version": "1.4.6",
-            "resolved": "https://registry.npmjs.org/comment-parser/-/comment-parser-1.4.6.tgz",
-            "integrity": "sha512-ObxuY6vnbWTN6Od72xfwN9DbzC7Y2vv8u1Soi9ahRKL37gb6y1qk6/dgjs+3JWuXJHWvsg3BXIwzd/rkmAwavg==",
+            "version": "1.4.7",
+            "resolved": "https://registry.npmjs.org/comment-parser/-/comment-parser-1.4.7.tgz",
+            "integrity": "sha512-0h+uSNtQGW3D98eQt3jJ8L06Fves8hncB4V/PKdw/Qb8Hnk19VaKuTr55UNRYiSoVa7WwrFls+rh3ux9agmkeQ==",
             "dev": true,
             "license": "MIT",
             "engines": {
@@ -1462,13 +1446,16 @@
             }
         },
         "node_modules/core-js-compat": {
-            "version": "3.49.0",
-            "resolved": "https://registry.npmjs.org/core-js-compat/-/core-js-compat-3.49.0.tgz",
-            "integrity": "sha512-VQXt1jr9cBz03b331DFDCCP90b3fanciLkgiOoy8SBHy06gNf+vQ1A3WFLqG7I8TipYIKeYK9wxd0tUrvHcOZA==",
+            "version": "3.50.0",
+            "resolved": "https://registry.npmjs.org/core-js-compat/-/core-js-compat-3.50.0.tgz",
+            "integrity": "sha512-XGpFGbMLHwSt74YLTKho7Ib242qi6O8MSX+sRokV4oz7iKXvQWGYZthjIhjRGMxjzVkAubBO512dKGYcefmX3Q==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
-                "browserslist": "^4.28.1"
+                "browserslist": "^4.28.7"
+            },
+            "engines": {
+                "node": ">=6.4.0"
             },
             "funding": {
                 "type": "opencollective",
@@ -1633,21 +1620,21 @@
             }
         },
         "node_modules/electron-to-chromium": {
-            "version": "1.5.420",
-            "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.420.tgz",
-            "integrity": "sha512-2yD6XreGusOfNV+dUcvipJEXc3n/n7fgr7996aszTG+YY5E4mqM4tOq/3uhP129cazL9YHbVWSpc79ePotWtPA==",
+            "version": "1.5.452",
+            "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.452.tgz",
+            "integrity": "sha512-cVvk1YBSj6571VmV6hdJTqj94Y79xSu8cj6Y9t6ae4Y4431z8/7EJFvu3rVp90xhfuv9BpPKUmaLfTo4+FOGBg==",
             "dev": true,
             "license": "ISC"
         },
         "node_modules/enhanced-resolve": {
-            "version": "5.20.0",
-            "resolved": "https://registry.npmjs.org/enhanced-resolve/-/enhanced-resolve-5.20.0.tgz",
-            "integrity": "sha512-/ce7+jQ1PQ6rVXwe+jKEg5hW5ciicHwIQUagZkp6IufBoY3YDgdTTY1azVs0qoRgVmvsNB+rbjLJxDAeHHtwsQ==",
+            "version": "5.26.0",
+            "resolved": "https://registry.npmjs.org/enhanced-resolve/-/enhanced-resolve-5.26.0.tgz",
+            "integrity": "sha512-9vhedylFonb2YGogzUKX6+Ja72gOJbN1QHAqdrvqLwhdl/QWbKopzoUC9EbQNVsAns/bx/4uyqalrQAoy1IByw==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
                 "graceful-fs": "^4.2.4",
-                "tapable": "^2.3.0"
+                "tapable": "^2.3.3"
             },
             "engines": {
                 "node": ">=10.13.0"
@@ -1778,9 +1765,9 @@
             "license": "MIT"
         },
         "node_modules/eslint-fix-utils": {
-            "version": "0.4.2",
-            "resolved": "https://registry.npmjs.org/eslint-fix-utils/-/eslint-fix-utils-0.4.2.tgz",
-            "integrity": "sha512-n7ZTcwwkP5scedlhvWMcqxED+O1NzXcj5Rxn/0kJQMP88k02vRcBfQ1qsk/JHb6Aw8bajFoetFCCBiNIcNCsvA==",
+            "version": "0.4.4",
+            "resolved": "https://registry.npmjs.org/eslint-fix-utils/-/eslint-fix-utils-0.4.4.tgz",
+            "integrity": "sha512-9reP0fw++eZv0qs0ji8U1G9a+j8yWQW1RT8Wrlw32JlhQJDiweVX98kyDrJq6G7jdOLgKwmj0nPghyMadsOgHQ==",
             "dev": true,
             "license": "MIT",
             "engines": {
@@ -1796,6 +1783,28 @@
                 }
             }
         },
+        "node_modules/eslint-json-compat-utils": {
+            "version": "0.2.3",
+            "resolved": "https://registry.npmjs.org/eslint-json-compat-utils/-/eslint-json-compat-utils-0.2.3.tgz",
+            "integrity": "sha512-RbBmDFyu7FqnjE8F0ZxPNzx5UaptdeS9Uu50r7A+D7s/+FCX+ybiyViYEgFUaFIFqSWJgZRTpL5d8Kanxxl2lQ==",
+            "dev": true,
+            "license": "MIT",
+            "dependencies": {
+                "esquery": "^1.6.0"
+            },
+            "engines": {
+                "node": ">=12"
+            },
+            "peerDependencies": {
+                "eslint": "*",
+                "jsonc-eslint-parser": "^2.4.0 || ^3.0.0"
+            },
+            "peerDependenciesMeta": {
+                "@eslint/json": {
+                    "optional": true
+                }
+            }
+        },
         "node_modules/eslint-plugin-es-x": {
             "version": "7.8.0",
             "resolved": "https://registry.npmjs.org/eslint-plugin-es-x/-/eslint-plugin-es-x-7.8.0.tgz",
@@ -1819,38 +1828,38 @@
             }
         },
         "node_modules/eslint-plugin-jsdoc": {
-            "version": "62.9.0",
-            "resolved": "https://registry.npmjs.org/eslint-plugin-jsdoc/-/eslint-plugin-jsdoc-62.9.0.tgz",
-            "integrity": "sha512-PY7/X4jrVgoIDncUmITlUqK546Ltmx/Pd4Hdsu4CvSjryQZJI2mEV4vrdMufyTetMiZ5taNSqvK//BTgVUlNkA==",
+            "version": "63.3.3",
+            "resolved": "https://registry.npmjs.org/eslint-plugin-jsdoc/-/eslint-plugin-jsdoc-63.3.3.tgz",
+            "integrity": "sha512-xI4IeVRzRFA2DGHrPLIxF3U+oJHU3FE+P9Zb27fVs5dPHgfcpoAs0PyCbznVhK7pwR+9BPUztFeXSgpw/CL4Yg==",
             "dev": true,
             "license": "BSD-3-Clause",
             "dependencies": {
-                "@es-joy/jsdoccomment": "~0.86.0",
+                "@es-joy/jsdoccomment": "~0.91.0",
                 "@es-joy/resolve.exports": "1.2.0",
                 "are-docs-informative": "^0.0.2",
-                "comment-parser": "1.4.6",
+                "comment-parser": "1.4.7",
                 "debug": "^4.4.3",
                 "escape-string-regexp": "^4.0.0",
                 "espree": "^11.2.0",
                 "esquery": "^1.7.0",
                 "html-entities": "^2.6.0",
-                "object-deep-merge": "^2.0.0",
+                "object-deep-merge": "^2.0.1",
                 "parse-imports-exports": "^0.2.4",
-                "semver": "^7.7.4",
-                "spdx-expression-parse": "^4.0.0",
+                "semver": "^7.8.5",
+                "spdx-expression-parse": "^5.0.0",
                 "to-valid-identifier": "^1.0.0"
             },
             "engines": {
-                "node": "^20.19.0 || ^22.13.0 || >=24"
+                "node": "^22.13.0 || >=24"
             },
             "peerDependencies": {
                 "eslint": "^7.0.0 || ^8.0.0 || ^9.0.0 || ^10.0.0"
             }
         },
         "node_modules/eslint-plugin-n": {
-            "version": "17.24.0",
-            "resolved": "https://registry.npmjs.org/eslint-plugin-n/-/eslint-plugin-n-17.24.0.tgz",
-            "integrity": "sha512-/gC7/KAYmfNnPNOb3eu8vw+TdVnV0zhdQwexsw6FLXbhzroVj20vRn2qL8lDWDGnAQ2J8DhdfvXxX9EoxvERvw==",
+            "version": "18.4.1",
+            "resolved": "https://registry.npmjs.org/eslint-plugin-n/-/eslint-plugin-n-18.4.1.tgz",
+            "integrity": "sha512-2sBReWOvCbzgkPri9M5SFmD5EbIwZLa1xz6B5RZsrI19WSFKpyx1sOMr+pdk8puCiXuEgCbErEHy1PuaUrc/4w==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
@@ -1861,17 +1870,27 @@
                 "globals": "^15.11.0",
                 "globrex": "^0.1.2",
                 "ignore": "^5.3.2",
-                "semver": "^7.6.3",
-                "ts-declaration-location": "^1.0.6"
+                "js-yaml": "^5.4.1",
+                "semver": "^7.6.3"
             },
             "engines": {
-                "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
+                "node": "^20.19.0 || ^22.13.0 || >=24"
             },
             "funding": {
                 "url": "https://opencollective.com/eslint"
             },
             "peerDependencies": {
-                "eslint": ">=8.23.0"
+                "eslint": ">=8.57.1",
+                "ts-declaration-location": "^1.0.6",
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@@ -1888,63 +1907,70 @@
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             "dev": true,
             "license": "MIT",
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                 "@altano/repository-tools": "^2.0.1",
+                "@types/estree": "^1.0.0",
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                 "detect-newline": "^4.0.1",
-                "eslint-fix-utils": "~0.4.1",
-                "package-json-validator": "^1.4.1",
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-                "sort-package-json": "^3.4.0",
-                "validate-npm-package-name": "^7.0.0"
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-                "jsonc-eslint-parser": ">=2.0.0"
+                "@eslint/json": ">=1.0.0",
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+            },
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-            "resolved": "https://registry.npmjs.org/eslint-plugin-unicorn/-/eslint-plugin-unicorn-64.0.0.tgz",
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             "license": "MIT",
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-                "@babel/helper-validator-identifier": "^7.28.5",
+                "@babel/helper-validator-identifier": "^7.29.7",
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+                "browserslist": "^4.28.2",
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                 "core-js-compat": "^3.49.0",
+                "detect-indent": "^7.0.2",
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-                "globals": "^17.4.0",
+                "globals": "^17.6.0",
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                 "pluralize": "^8.0.0",
-                "regexp-tree": "^0.1.27",
-                "regjsparser": "^0.13.0",
-                "semver": "^7.7.4",
+                "regjsparser": "^0.13.1",
+                "semver": "^7.8.4",
                 "strip-indent": "^4.1.1"
             },
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-                "node": "^20.10.0 || >=21.0.0"
+                "node": ">=22"
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                 "url": "https://github.com/sindresorhus/eslint-plugin-unicorn?sponsor=1"
             },
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-                "eslint": ">=9.38.0"
+                "eslint": ">=10.4"
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@@ -2178,9 +2204,9 @@
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             "license": "MIT",
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@@ -2405,10 +2431,33 @@
             "dev": true,
             "license": "ISC"
         },
+        "node_modules/js-yaml": {
+            "version": "5.4.3",
+            "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-5.4.3.tgz",
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+            "dev": true,
+            "funding": [
+                {
+                    "type": "github",
+                    "url": "https://github.com/sponsors/puzrin"
+                },
+                {
+                    "type": "github",
+                    "url": "https://github.com/sponsors/nodeca"
+                }
+            ],
+            "license": "MIT",
+            "dependencies": {
+                "argparse": "^2.0.1"
+            },
+            "bin": {
+                "js-yaml": "bin/js-yaml.mjs"
+            }
+        },
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-            "resolved": "https://registry.npmjs.org/jsdoc-type-pratt-parser/-/jsdoc-type-pratt-parser-7.2.0.tgz",
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+            "version": "8.0.0",
+            "resolved": "https://registry.npmjs.org/jsdoc-type-pratt-parser/-/jsdoc-type-pratt-parser-8.0.0.tgz",
+            "integrity": "sha512-uQu/fXVqVaMg6gM8/E5G5+eygVcZ1NV0Z51CvqhNa2bDWxvHMl484ETr6vph4oPyC+KUcbP/w2W2pewfCiR9aQ==",
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             "license": "MIT",
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@@ -2443,16 +2492,15 @@
             "license": "MIT"
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-            "resolved": "https://registry.npmjs.org/jsonc-eslint-parser/-/jsonc-eslint-parser-3.1.0.tgz",
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+            "version": "3.3.0",
+            "resolved": "https://registry.npmjs.org/jsonc-eslint-parser/-/jsonc-eslint-parser-3.3.0.tgz",
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                 "acorn": "^8.5.0",
                 "eslint-visitor-keys": "^5.0.0",
-                "semver": "^7.3.5"
+                "verkit": "^0.3.2"
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                 "node": "^20.19.0 || ^22.13.0 || >=24"
@@ -2787,9 +2835,9 @@
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+            "version": "11.5.3",
+            "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-11.5.3.tgz",
+            "integrity": "sha512-U4N8FgzmWxc8k1VH8Kr6lQg18U7Fjvby6wXHVRX/ZZ7IwWbRMgrRbP0Wrb5q5NVinryp4SQampHKdvtecItxUg==",
             "dev": true,
             "license": "BlueOak-1.0.0",
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@@ -2857,9 +2905,9 @@
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-            "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.54.tgz",
-            "integrity": "sha512-YHs7BmmcsdAI5Ozuf8JZo6PT0mv2GIWC9vMfvUC3dp65M8hn7Ux8CPL+2oBI7juNuj9d0ndhTcznq2ODBps9cQ==",
+            "version": "2.0.58",
+            "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.58.tgz",
+            "integrity": "sha512-BdiKAgbfRlvfMq/XzO/AF9NPmaA8a+YpLAyAFTVFBj3gARrAIfWvNq7Q7NE4se3KgFu0KkrvQMxTS0XVnsGzHg==",
             "dev": true,
             "license": "MIT",
             "engines": {
@@ -2899,9 +2947,9 @@
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-            "resolved": "https://registry.npmjs.org/object-deep-merge/-/object-deep-merge-2.0.0.tgz",
-            "integrity": "sha512-3DC3UMpeffLTHiuXSy/UG4NOIYTLlY9u3V82+djSCLYClWobZiS4ivYzpIUWrRY/nfsJ8cWsKyG3QfyLePmhvg==",
+            "version": "2.0.1",
+            "resolved": "https://registry.npmjs.org/object-deep-merge/-/object-deep-merge-2.0.1.tgz",
+            "integrity": "sha512-aKttDKcU3pyZqKcCkDhsMn70WmZFG2JGDQLP9EcLyTSIFQRCPWLAmBZRLJnrVUrhPG1jETEEbfdgbNtJf1LyMg==",
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             "license": "MIT"
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@@ -2970,9 +3018,9 @@
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-            "resolved": "https://registry.npmjs.org/package-json-validator/-/package-json-validator-1.5.1.tgz",
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+            "version": "1.6.1",
+            "resolved": "https://registry.npmjs.org/package-json-validator/-/package-json-validator-1.6.1.tgz",
+            "integrity": "sha512-eyl3DGFoxdUO0RA1Ym+H11S6P2XWIlA6Sy2PbvslbwFJ14kkz+FgX1Br3MaebrvLY3Q10Iih3PsL3741vsevrA==",
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@@ -3132,20 +3180,10 @@
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-            "resolved": "https://registry.npmjs.org/regexp-tree/-/regexp-tree-0.1.27.tgz",
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-            "dev": true,
-            "license": "MIT",
-            "bin": {
-                "regexp-tree": "bin/regexp-tree"
-            }
-        },
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-            "version": "0.13.1",
-            "resolved": "https://registry.npmjs.org/regjsparser/-/regjsparser-0.13.1.tgz",
-            "integrity": "sha512-dLsljMd9sqwRkby8zhO1gSg3PnJIBFid8f4CQj/sXx+7cKx+E7u0PKhZ+U4wmhx7EfmtvnA318oVaIkAB1lRJw==",
+            "version": "0.13.4",
+            "resolved": "https://registry.npmjs.org/regjsparser/-/regjsparser-0.13.4.tgz",
+            "integrity": "sha512-EWV80YgFaVgFrjGCAsV7oybp4GOxbls5RzBg8OB0nKEVXsBJR1JlV8Di1JhCROg3MzTfe1RI8yitIm1eOs68iA==",
             "dev": true,
             "license": "BSD-2-Clause",
             "dependencies": {
@@ -3214,9 +3252,9 @@
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-            "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.4.tgz",
-            "integrity": "sha512-vFKC2IEtQnVhpT78h1Yp8wzwrf8CM+MzKMHGJZfBtzhZNycRFnXsHk6E5TxIkkMsgNS7mdX3AGB7x2QM2di4lA==",
+            "version": "7.8.5",
+            "resolved": "https://registry.npmjs.org/semver/-/semver-7.8.5.tgz",
+            "integrity": "sha512-Y7/KDsb8LjooZpwaqGyulO6DQlksgCncchHGk+sZIY4SBvUocMBEFH5Ur1fI4dV+Jvl0w6cjvucaIi40puRioA==",
             "dev": true,
             "license": "ISC",
             "bin": {
@@ -3257,9 +3295,9 @@
             "license": "MIT"
         },
         "node_modules/sort-package-json": {
-            "version": "3.6.1",
-            "resolved": "https://registry.npmjs.org/sort-package-json/-/sort-package-json-3.6.1.tgz",
-            "integrity": "sha512-Chgejw1+10p2D0U2tB7au1lHtz6TkFnxmvZktyBCRyV0GgmF6nl1IxXxAsPtJVsUyg/fo+BfCMAVVFUVRkAHrQ==",
+            "version": "4.0.0",
+            "resolved": "https://registry.npmjs.org/sort-package-json/-/sort-package-json-4.0.0.tgz",
+            "integrity": "sha512-6aYOlYI9AWioZ+rzu+4zKLmoFqJP0/fHDxrd7X04yqEibikY+5YVF0EYlyGn4v6X2PJY7yAUWV7oeP+i5rOm/g==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
@@ -3275,7 +3313,7 @@
                 "sort-package-json": "cli.js"
             },
             "engines": {
-                "node": ">=20"
+                "node": ">=22"
             }
         },
         "node_modules/source-map-js": {
@@ -3319,9 +3357,9 @@
             "license": "CC-BY-3.0"
         },
         "node_modules/spdx-expression-parse": {
-            "version": "4.0.0",
-            "resolved": "https://registry.npmjs.org/spdx-expression-parse/-/spdx-expression-parse-4.0.0.tgz",
-            "integrity": "sha512-Clya5JIij/7C6bRR22+tnGXbc4VKlibKSVj2iHvVeX5iMW7s1SIQlqu699JkODJJIhh/pUu8L0/VLh8xflD+LQ==",
+            "version": "5.0.0",
+            "resolved": "https://registry.npmjs.org/spdx-expression-parse/-/spdx-expression-parse-5.0.0.tgz",
+            "integrity": "sha512-vngmw3Rgn+o2arXNbnZaj5UtOEBuWBfvaI+Wc8GFfykIhA5/vdK9/Sp/XkLv63dykz2rxKDvKEHupF5P0FORcQ==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
@@ -3330,9 +3368,9 @@
             }
         },
         "node_modules/spdx-license-ids": {
-            "version": "3.0.23",
-            "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.23.tgz",
-            "integrity": "sha512-CWLcCCH7VLu13TgOH+r8p1O/Znwhqv/dbb6lqWy67G+pT1kHmeD/+V36AVb/vq8QMIQwVShJ6Ssl5FPh0fuSdw==",
+            "version": "3.0.24",
+            "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.24.tgz",
+            "integrity": "sha512-cLS9TtWkIQFyLkJ3/5aFQAOHOSKTlOs/7WDut/XPSdjom1fJhUdkepeJAKXa9Y05+FabHd0sti+Et559vDtkpQ==",
             "dev": true,
             "license": "CC0-1.0"
         },
@@ -3357,9 +3395,9 @@
             }
         },
         "node_modules/tapable": {
-            "version": "2.3.0",
-            "resolved": "https://registry.npmjs.org/tapable/-/tapable-2.3.0.tgz",
-            "integrity": "sha512-g9ljZiwki/LfxmQADO3dEY1CbpmXT5Hm2fJ+QaGKwSXUylMybePR7/67YW7jOrrvjEgL1Fmz5kzyAjWVWLlucg==",
+            "version": "2.3.3",
+            "resolved": "https://registry.npmjs.org/tapable/-/tapable-2.3.3.tgz",
+            "integrity": "sha512-uxc/zpqFg6x7C8vOE7lh6Lbda8eEL9zmVm/PLeTPBRhh1xCgdWaQ+J1CUieGpIfm2HdtsUpRv+HshiasBMcc6A==",
             "dev": true,
             "license": "MIT",
             "engines": {
@@ -3437,29 +3475,6 @@
                 "typescript": ">=4.8.4"
             }
         },
-        "node_modules/ts-declaration-location": {
-            "version": "1.0.7",
-            "resolved": "https://registry.npmjs.org/ts-declaration-location/-/ts-declaration-location-1.0.7.tgz",
-            "integrity": "sha512-EDyGAwH1gO0Ausm9gV6T2nUvBgXT5kGoCMJPllOaooZ+4VvJiKBdZE7wK18N1deEowhcUptS+5GXZK8U/fvpwA==",
-            "dev": true,
-            "funding": [
-                {
-                    "type": "ko-fi",
-                    "url": "https://ko-fi.com/rebeccastevens"
-                },
-                {
-                    "type": "tidelift",
-                    "url": "https://tidelift.com/funding/github/npm/ts-declaration-location"
-                }
-            ],
-            "license": "BSD-3-Clause",
-            "dependencies": {
-                "picomatch": "^4.0.2"
-            },
-            "peerDependencies": {
-                "typescript": ">=4.0.0"
-            }
-        },
         "node_modules/type-check": {
             "version": "0.4.0",
             "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
@@ -3519,9 +3534,9 @@
             "license": "MIT"
         },
         "node_modules/update-browserslist-db": {
-            "version": "1.3.2",
-            "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.3.2.tgz",
-            "integrity": "sha512-UQ+MSxlhRm1bzjhU+DcuXfjFO1FzNtqhK5+9Yvlp90ItDLk5vT932A0rFu619nf7RVS+Y/VeaUW1jaRDqZ8VJw==",
+            "version": "1.3.4",
+            "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.3.4.tgz",
+            "integrity": "sha512-t8wonIOdQyOjtPd2VktlBu6QjTVTks6v8bSi7kd0r2Vll8TK1JYDZtRRdbmCHOAMphkZgrzK+L+vXK4pyZ8t4A==",
             "dev": true,
             "funding": [
                 {
@@ -3591,6 +3606,19 @@
                 "node": "^20.17.0 || >=22.9.0"
             }
         },
+        "node_modules/verkit": {
+            "version": "0.3.2",
+            "resolved": "https://registry.npmjs.org/verkit/-/verkit-0.3.2.tgz",
+            "integrity": "sha512-zj/ob3UsvJGN0whEAKFp53REA5X66hvffVqoCtVQAakJKnKlH+/PcOfMoFwIG/o4rElqLv/ycAFlx8ZlXUorCg==",
+            "dev": true,
+            "license": "MIT",
+            "engines": {
+                "node": ">=18.12.0"
+            },
+            "funding": {
+                "url": "https://github.com/sponsors/sxzz"
+            }
+        },
         "node_modules/vite": {
             "version": "8.3.2",
             "resolved": "https://registry.npmjs.org/vite/-/vite-8.3.2.tgz",
diff --git a/package.json b/package.json
index 0a0f52d3..af6235a6 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "devDependencies": {
         "@biomejs/biome": "^2.5.15",
         "@eslint/compat": "^2.1.1",
-        "@feedic/eslint-config": "^0.4.1",
+        "@feedic/eslint-config": "^0.5.0",
         "@types/node": "^26.6.4",
         "eslint": "^10.12.0",
         "eslint-config-biome": "^2.1.3",
diff --git a/src/compile.ts b/src/compile.ts
index e7ab3c10..a804aa63 100644
--- a/src/compile.ts
+++ b/src/compile.ts
@@ -4,7 +4,7 @@ import { compileGeneralSelector } from "./general.js";
 import { getElementParent } from "./helpers/querying.js";
 import {
     getQuality,
-    includesScopePseudo,
+    hasScopePseudo,
     isTraversal,
     sortRules,
 } from "./helpers/selectors.js";
@@ -28,7 +28,7 @@ const SCOPE_TOKEN: Selector = {
 
 /*
  * CSS 4 Spec (Draft): 3.4.1. Absolutizing a Relative Selector
- * http://www.w3.org/TR/selectors4/#absolutizing
+ * https://www.w3.org/TR/selectors4/#absolutizing
  */
 function absolutize<Node, ElementNode extends Node>(
     token: InternalSelector[][],
@@ -50,7 +50,7 @@ function absolutize<Node, ElementNode extends Node>(
             t[0].type !== SelectorType.Descendant
         ) {
             // Don't continue in else branch
-        } else if (hasContext && !t.some(includesScopePseudo)) {
+        } else if (hasContext && !t.some(hasScopePseudo)) {
             t.unshift(DESCENDANT_TOKEN);
         } else {
             continue;
diff --git a/src/general.ts b/src/general.ts
index 87574a28..0ba02518 100644
--- a/src/general.ts
+++ b/src/general.ts
@@ -76,7 +76,7 @@ export function compileGeneralSelector<Node, ElementNode extends Node>(
                 name = name.toLowerCase();
             }
 
-            return function tag(element: ElementNode): boolean {
+            return function isTag(element: ElementNode): boolean {
                 return adapter.getName(element) === name && next(element);
             };
         }
@@ -88,7 +88,7 @@ export function compileGeneralSelector<Node, ElementNode extends Node>(
                 cacheResults === false ||
                 typeof WeakMap === "undefined"
             ) {
-                return function descendant(element: ElementNode): boolean {
+                return function isDescendant(element: ElementNode): boolean {
                     let current: ElementNode | null = element;
 
                     while ((current = getElementParent(current, adapter))) {
@@ -106,7 +106,7 @@ export function compileGeneralSelector<Node, ElementNode extends Node>(
                 ElementNode,
                 { matches: boolean }
             >();
-            return function cachedDescendant(element: ElementNode): boolean {
+            return function isCachedDescendant(element: ElementNode): boolean {
                 let current: ElementNode | null = element;
                 let result: { matches: boolean } | undefined;
 
@@ -133,7 +133,9 @@ export function compileGeneralSelector<Node, ElementNode extends Node>(
         }
         case "_flexibleDescendant": {
             // Include element itself, only used while querying an array
-            return function flexibleDescendant(element: ElementNode): boolean {
+            return function isFlexibleDescendant(
+                element: ElementNode,
+            ): boolean {
                 let current: ElementNode | null = element;
 
                 do {
@@ -147,20 +149,20 @@ export function compileGeneralSelector<Node, ElementNode extends Node>(
             };
         }
         case SelectorType.Parent: {
-            return function parent(element: ElementNode): boolean {
+            return function isParent(element: ElementNode): boolean {
                 return adapter
                     .getChildren(element)
                     .some((element) => adapter.isTag(element) && next(element));
             };
         }
         case SelectorType.Child: {
-            return function child(element: ElementNode): boolean {
+            return function isChild(element: ElementNode): boolean {
                 const parent = getElementParent(element, adapter);
                 return parent !== null && next(parent);
             };
         }
         case SelectorType.Sibling: {
-            return function sibling(element: ElementNode): boolean {
+            return function isSibling(element: ElementNode): boolean {
                 const siblings = adapter.getSiblings(element);
 
                 for (const currentSibling of siblings) {
@@ -177,14 +179,14 @@ export function compileGeneralSelector<Node, ElementNode extends Node>(
         }
         case SelectorType.Adjacent: {
             if (adapter.prevElementSibling) {
-                return function adjacent(element: ElementNode): boolean {
+                return function isAdjacent(element: ElementNode): boolean {
                     // biome-ignore lint/style/noNonNullAssertion: checked by if statement
                     const previous = adapter.prevElementSibling!(element);
                     return previous != null && next(previous);
                 };
             }
 
-            return function adjacent(element: ElementNode): boolean {
+            return function isAdjacent(element: ElementNode): boolean {
                 const siblings = adapter.getSiblings(element);
                 let lastElement: ElementNode | undefined;
 
diff --git a/src/helpers/cache.ts b/src/helpers/cache.ts
index e92241e4..53bb3c2e 100644
--- a/src/helpers/cache.ts
+++ b/src/helpers/cache.ts
@@ -13,15 +13,15 @@ import { getElementParent } from "./querying.js";
  * @param options Configuration object for cache behavior.
  * @param options.adapter Adapter implementation used for DOM access.
  * @param options.cacheResults Whether results should be memoized by input root.
- * @param matches Compiled matcher function to wrap with caching.
+ * @param isMatch Compiled matcher function to wrap with caching.
  */
 export function cacheParentResults<Node, ElementNode extends Node>(
     next: CompiledQuery<ElementNode>,
     { adapter, cacheResults }: InternalOptions<Node, ElementNode>,
-    matches: (element: ElementNode) => boolean,
+    isMatch: (element: ElementNode) => boolean,
 ): CompiledQuery<ElementNode> {
     if (cacheResults === false || typeof WeakMap === "undefined") {
-        return (element) => next(element) && matches(element);
+        return (element) => next(element) && isMatch(element);
     }
 
     // Use a cache to avoid re-checking children of an element.
@@ -30,10 +30,10 @@ export function cacheParentResults<Node, ElementNode extends Node>(
     const resultCache = new WeakMap<Node, boolean>();
 
     function addResultToCache(element: ElementNode) {
-        const result = matches(element);
+        const isMatched = isMatch(element);
 
-        resultCache.set(element, result);
-        return result;
+        resultCache.set(element, isMatched);
+        return isMatched;
     }
 
     return function cachedMatcher(element) {
diff --git a/src/helpers/options.ts b/src/helpers/options.ts
index 0efd95c1..1471b8a8 100644
--- a/src/helpers/options.ts
+++ b/src/helpers/options.ts
@@ -5,6 +5,7 @@ import type { InternalOptions } from "../types.js";
  *
  * This is used when compiling nested selectors (e.g. inside `:is`, `:not`,
  * `:nth-child(… of S)`) so that the parent compilation state doesn't leak.
+ * @param options The parent compilation options.
  */
 export function copyOptions<Node, ElementNode extends Node>(
     options: InternalOptions<Node, ElementNode>,
diff --git a/src/helpers/selectors.ts b/src/helpers/selectors.ts
index 3569d0df..298d6b61 100644
--- a/src/helpers/selectors.ts
+++ b/src/helpers/selectors.ts
@@ -1,3 +1,4 @@
+/* eslint-disable unicorn/prefer-includes-over-repeated-comparisons -- Keep selector quality comparisons allocation free. */
 import {
     AttributeAction,
     type AttributeSelector,
@@ -126,11 +127,11 @@ export function getQuality(token: InternalSelector): number {
  * Check whether a token or nested token includes `:scope`.
  * @param t Selector token under inspection.
  */
-export function includesScopePseudo(t: InternalSelector): boolean {
+export function hasScopePseudo(t: InternalSelector): boolean {
     return (
         t.type === SelectorType.Pseudo &&
         (t.name === "scope" ||
             (Array.isArray(t.data) &&
-                t.data.some((data) => data.some(includesScopePseudo))))
+                t.data.some((data) => data.some(hasScopePseudo))))
     );
 }
diff --git a/src/index.ts b/src/index.ts
index 1c90114b..94ba1fb6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -17,10 +17,10 @@ import type {
     Query,
 } from "./types.js";
 
-const defaultEquals = <Node>(a: Node, b: Node) => a === b;
+const isEqualDefault = <Node>(a: Node, b: Node) => a === b;
 const defaultOptions: InternalOptions<DomHandlerNode, DomHandlerElement> = {
     adapter: { ...DomUtils, isTag },
-    equals: defaultEquals,
+    equals: isEqualDefault,
 };
 
 function convertOptionFormats<Node, ElementNode extends Node>(
@@ -34,7 +34,7 @@ function convertOptionFormats<Node, ElementNode extends Node>(
     // @ts-expect-error Same as above.
     finalOptions.adapter ??= defaultOptions.adapter;
     // @ts-expect-error `equals` does not exist on `Options`
-    finalOptions.equals ??= finalOptions.adapter?.equals ?? defaultEquals;
+    finalOptions.equals ??= finalOptions.adapter?.equals ?? isEqualDefault;
 
     return finalOptions as InternalOptions<Node, ElementNode>;
 }
@@ -207,6 +207,7 @@ export const selectOne: <Node, ElementNode extends Node>(
  * @see compile for supported selector queries.
  * @returns Whether the element matches the query.
  */
+// eslint-disable-next-line unicorn/consistent-boolean-name -- Preserve the existing exported function name.
 export function is<Node, ElementNode extends Node>(
     element: ElementNode,
     query: Query<ElementNode>,
diff --git a/src/pseudo-selectors/filters.ts b/src/pseudo-selectors/filters.ts
index ea98cd98..1ebaabae 100644
--- a/src/pseudo-selectors/filters.ts
+++ b/src/pseudo-selectors/filters.ts
@@ -11,7 +11,7 @@ import type { CompiledQuery, CompileToken, InternalOptions } from "../types.js";
  * @param tag - Lowercased subtags of the element's language value.
  * @param range - Lowercased subtags of the language range to match against.
  */
-function extendedFilter(tag: string[], range: string[]): boolean {
+function isExtendedFilter(tag: string[], range: string[]): boolean {
     if (range[0] !== "*" && range[0] !== tag[0]) return false;
 
     let tagIndex = 1;
@@ -43,10 +43,13 @@ export type Filter = <Node, ElementNode extends Node>(
     compileToken?: CompileToken<Node, ElementNode>,
 ) => CompiledQuery<ElementNode>;
 
-function compileNth(reverse: boolean, ofType: boolean): Filter {
+function compileNth(
+    shouldCountFromEnd: boolean,
+    shouldCountSameType: boolean,
+): Filter {
     return function nth(next, rule, options, context, compileToken) {
         const { adapter, equals } = options;
-        const ofMatch = ofType ? null : rule.match(nthOfRegex);
+        const ofMatch = shouldCountSameType ? null : rule.match(nthOfRegex);
         const nthCheck = getNCheck(ofMatch ? ofMatch[1].trim() : rule);
 
         if (nthCheck === boolbase.falseFunc) return boolbase.falseFunc;
@@ -72,12 +75,12 @@ function compileNth(reverse: boolean, ofType: boolean): Filter {
         const shouldCount = ofSelector
             ? (_element: ElementNode, sibling: ElementNode) =>
                   ofSelector(sibling)
-            : ofType
+            : shouldCountSameType
               ? (element: ElementNode, sibling: ElementNode) =>
                     adapter.getName(sibling) === adapter.getName(element)
               : boolbase.trueFunc;
 
-        if (reverse) {
+        if (shouldCountFromEnd) {
             return function nthLast(element) {
                 if (ofSelector && !ofSelector(element)) return false;
                 const siblings = adapter.getSiblings(element);
@@ -186,7 +189,7 @@ export const filters: Record<string, Filter> = {
 
                     const tag = value.toLowerCase().split("-");
                     return (
-                        ranges.some((r) => extendedFilter(tag, r)) &&
+                        ranges.some((r) => isExtendedFilter(tag, r)) &&
                         next(element)
                     );
                 }
@@ -222,7 +225,7 @@ function dynamicStatePseudo(
             return boolbase.falseFunc;
         }
 
-        return function active(element) {
+        return function isActive(element) {
             return filterFunction(element) && next(element);
         };
     };
diff --git a/src/pseudo-selectors/index.ts b/src/pseudo-selectors/index.ts
index d711a337..b4cf903d 100644
--- a/src/pseudo-selectors/index.ts
+++ b/src/pseudo-selectors/index.ts
@@ -38,14 +38,17 @@ export function compilePseudoSelector<Node, ElementNode extends Node>(
     const { name, data } = selector;
 
     if (Array.isArray(data)) {
-        if (!(name in subselects)) {
+        if (!Object.hasOwn(subselects, name)) {
             throw new Error(`Unknown pseudo-class :${name}(${data})`);
         }
 
         return subselects[name](next, data, options, context, compileToken);
     }
 
-    const userPseudo = options.pseudos?.[name];
+    const userPseudo =
+        options.pseudos && Object.hasOwn(options.pseudos, name)
+            ? options.pseudos[name]
+            : undefined;
 
     const stringPseudo =
         typeof userPseudo === "string" ? userPseudo : aliases[name];
@@ -66,7 +69,7 @@ export function compilePseudoSelector<Node, ElementNode extends Node>(
         return (element) => userPseudo(element, data) && next(element);
     }
 
-    if (name in filters) {
+    if (Object.hasOwn(filters, name)) {
         return filters[name](
             next,
             data as string,
@@ -76,7 +79,7 @@ export function compilePseudoSelector<Node, ElementNode extends Node>(
         );
     }
 
-    if (name in pseudos) {
+    if (Object.hasOwn(pseudos, name)) {
         const pseudo = pseudos[name];
         verifyPseudoArguments(pseudo, name, data, 2);
 
diff --git a/src/pseudo-selectors/pseudos.ts b/src/pseudo-selectors/pseudos.ts
index 99b5c24c..81c89cd7 100644
--- a/src/pseudo-selectors/pseudos.ts
+++ b/src/pseudo-selectors/pseudos.ts
@@ -13,7 +13,7 @@ type Pseudo = <Node, ElementNode extends Node>(
  * line feeds.
  * @see {@link https://www.w3.org/TR/css-text-3/#white-space}
  */
-const isDocumentWhiteSpace = /^[ \t\r\n]*$/;
+const documentWhitespaceRegex = /^[ \t\r\n]*$/;
 
 // While filters are precompiled, pseudos get called when they are needed
 /** Runtime pseudo selector implementations. */
@@ -26,7 +26,7 @@ export const pseudos: Record<string, Pseudo> = {
             // Then, check that the text content is only whitespace.
             children.every((element) =>
                 // FIXME: `getText` call is potentially expensive.
-                isDocumentWhiteSpace.test(adapter.getText(element)),
+                documentWhitespaceRegex.test(adapter.getText(element)),
             )
         );
     },
@@ -116,22 +116,22 @@ export const pseudos: Record<string, Pseudo> = {
 
 /**
  * Validate pseudo selector argument arity.
- * @param pseudoClassCondition Pseudo-function implementation to wrap.
+ * @param isPseudoClassCondition Pseudo-function implementation to wrap.
  * @param name Name of the pseudo selector.
  * @param subselect Subselector passed to the pseudo-function.
  * @param argumentIndex Index of the argument parser to apply.
  */
 export function verifyPseudoArguments<T extends unknown[]>(
-    pseudoClassCondition: (...parameters: T) => boolean,
+    isPseudoClassCondition: (...parameters: T) => boolean,
     name: string,
     subselect: PseudoSelector["data"],
     argumentIndex: number,
 ): void {
     if (subselect === null) {
-        if (pseudoClassCondition.length > argumentIndex) {
+        if (isPseudoClassCondition.length > argumentIndex) {
             throw new Error(`Pseudo-class :${name} requires an argument`);
         }
-    } else if (pseudoClassCondition.length === argumentIndex) {
+    } else if (isPseudoClassCondition.length === argumentIndex) {
         throw new Error(`Pseudo-class :${name} doesn't have any arguments`);
     }
 }
diff --git a/src/pseudo-selectors/subselects.ts b/src/pseudo-selectors/subselects.ts
index 19f2762a..e93f4804 100644
--- a/src/pseudo-selectors/subselects.ts
+++ b/src/pseudo-selectors/subselects.ts
@@ -3,7 +3,7 @@ import type { Selector } from "css-what";
 import { cacheParentResults } from "../helpers/cache.js";
 import { copyOptions } from "../helpers/options.js";
 import { findOne, getNextSiblings } from "../helpers/querying.js";
-import { includesScopePseudo, isTraversal } from "../helpers/selectors.js";
+import { hasScopePseudo, isTraversal } from "../helpers/selectors.js";
 import type { CompiledQuery, CompileToken, InternalOptions } from "../types.js";
 
 /** Used as a placeholder for :has. Will be replaced with the actual element. */
@@ -26,11 +26,10 @@ type Subselect = <Node, ElementNode extends Node>(
  * @param selector - The selector to check.
  * @returns Whether the selector has any properties that rely on the current element.
  */
-function hasDependsOnCurrentElement(selector: Selector[][]) {
+function isContextDependent(selector: Selector[][]) {
     return selector.some(
         (sel) =>
-            sel.length > 0 &&
-            (isTraversal(sel[0]) || sel.some(includesScopePseudo)),
+            sel.length > 0 && (isTraversal(sel[0]) || sel.some(hasScopePseudo)),
     );
 }
 
@@ -86,7 +85,7 @@ export const subselects: Record<string, Subselect> = {
             ? // Used as a placeholder. Will be replaced with the actual element.
               [PLACEHOLDER_ELEMENT as unknown as ElementNode]
             : undefined;
-        const skipCache = hasDependsOnCurrentElement(subselect);
+        const shouldSkipCache = isContextDependent(subselect);
 
         const compiled = compileToken(subselect, copiedOptions, context);
 
@@ -96,7 +95,7 @@ export const subselects: Record<string, Subselect> = {
 
         // If `compiled` is `trueFunc`, we can skip this.
         if (context && compiled !== boolbase.trueFunc) {
-            return skipCache
+            return shouldSkipCache
                 ? (element) => {
                       if (!next(element)) {
                           return false;
@@ -134,7 +133,7 @@ export const subselects: Record<string, Subselect> = {
         const hasOne = (element: ElementNode) =>
             findOne(compiled, adapter.getChildren(element), options) !== null;
 
-        return skipCache
+        return shouldSkipCache
             ? (element) => next(element) && hasOne(element)
             : cacheParentResults(next, options, hasOne);
     },
diff --git a/test/api.ts b/test/api.ts
index 97884377..74c8c997 100644
--- a/test/api.ts
+++ b/test/api.ts
@@ -133,6 +133,26 @@ describe("API", () => {
     });
 
     describe("errors", () => {
+        it.each([":constructor", ":toString", ":constructor(div)"])(
+            "should reject inherited pseudo name %s",
+            (selector) => {
+                expect(() => CSSselect.compile(selector)).toThrow(
+                    "Unknown pseudo-class",
+                );
+                expect(() =>
+                    CSSselect.compile(selector, { pseudos: {} }),
+                ).toThrow("Unknown pseudo-class");
+            },
+        );
+
+        it("should allow an own custom pseudo named constructor", () => {
+            expect(
+                CSSselect.is(dom, ":constructor", {
+                    pseudos: { constructor: () => true },
+                }),
+            ).toBe(true);
+        });
+
         it("should throw with a pseudo-element", () => {
             expect(() => CSSselect.compile("::after")).toThrow("not supported");
         });
@@ -441,7 +461,7 @@ describe("API", () => {
         });
 
         it("should support isHovered", () => {
-            const dom = parseDocument(`${"<p>foo".repeat(10)}`)
+            const dom = parseDocument("<p>foo".repeat(10))
                 .children as Element[];
 
             const adapter = {
@@ -457,7 +477,7 @@ describe("API", () => {
         });
 
         it("should not match any elements if `isHovered` is not defined", () => {
-            const dom = parseDocument(`${"<p>foo".repeat(10)}`);
+            const dom = parseDocument("<p>foo".repeat(10));
             expect(CSSselect.selectAll("p:hover", dom)).toHaveLength(0);
         });
     });
diff --git a/test/nwmatcher.ts b/test/nwmatcher.ts
index 69f9cf90..74e13153 100644
--- a/test/nwmatcher.ts
+++ b/test/nwmatcher.ts
@@ -1,7 +1,7 @@
 /**
  * The NWMatcher Test Suite.
  * Adapted from https://github.com/dperini/nwmatcher/blob/master/test/scotch/test.js
- * (c) 2007-2013 Diego Perini (http://www.iport.it)
+ * (c) 2007-2013 Diego Perini (https://www.iport.it)
  *
  * See the LICENSE file for additional information.
  */
@@ -568,7 +568,7 @@ describe("NWMatcher", () => {
             );
             /*
              * Opera 10 does not accept values > 128 as a parameter to :nth-child
-             * See <http://operawiki.info/ArtificialLimits>
+             * See <https://operawiki.info/ArtificialLimits>
              */
             expect(select("ul > li:nth-child(n-128)")).toStrictEqual(
                 select("ul > li"),
diff --git a/test/sizzle.ts b/test/sizzle.ts
index c190ee01..a68d44cd 100755
--- a/test/sizzle.ts
+++ b/test/sizzle.ts
@@ -15,6 +15,7 @@ let document = loadDocument();
 
 describe("Sizzle", () => {
     beforeEach(() => {
+        // eslint-disable-next-line unicorn/no-top-level-assignment-in-function -- Reset the shared fixture before each test.
         document = loadDocument();
     });
 
@@ -38,9 +39,11 @@ describe("Sizzle", () => {
         // Select all
         expect(CSSselect.selectAll("*", document).length >= 30).toBe(true);
         const all = CSSselect.selectAll("*", document);
-        const good = all.every((element: AnyNode) => element.nodeType !== 8);
+        const hasNoComments = all.every(
+            (element: AnyNode) => element.nodeType !== 8,
+        );
         // Select all elements, no comment nodes
-        expect(good).toBe(true);
+        expect(hasNoComments).toBe(true);
         // Element Selector
         t("html", ["html"]);
         // Element Selector
@@ -362,7 +365,8 @@ describe("Sizzle", () => {
             )?.attribs["id"],
         );
 
-        for (const node of parseDOM(String.raw`<a id='backslash\foo'></a>`)) {
+        const escapedLink = parseDOM(String.raw`<a id='backslash\foo'></a>`);
+        for (const node of escapedLink) {
             DomUtils.appendChild(document.getElementById("form"), node);
         }
 
@@ -736,6 +740,7 @@ describe("Sizzle", () => {
         // Attribute Equals
         t("#qunit-fixture a[rel=bookmark]", ["simon1"]);
         // Attribute Equals
+        // eslint-disable-next-line unicorn/prefer-https -- Match the original HTTP fixture exactly.
         t("#qunit-fixture a[href='http://www.google.com/']", ["google"]);
         // Attribute Equals
         t("#qunit-fixture a[ rel = 'bookmark' ]", ["simon1"]);
@@ -939,7 +944,7 @@ describe("Sizzle", () => {
         t(String.raw`input[data-attr='\04e00']`, ["attrbad_unicode"]);
 
         document.getElementById("attrbad_unicode").attribs["data-attr"] =
-            "\uD834\uDF06A";
+            "\u{1D306}A";
         /*
          * It was too much code to fix Safari 5.x Supplemental Plane crashes (see ba5f09fa404379a87370ec905ffa47f8ac40aaa3)
          * Long numeric escape (non-BMP)
@@ -1417,7 +1422,7 @@ describe("Sizzle", () => {
                 ...parseDOM(
                     "<input id='input_%' type='%'/><button id='button_%' type='%'>test</button>".replace(
                         /%/g,
-                        type,
+                        () => type,
                     ),
                 ),
             ]; // Create a copy of the array, so that `appendChild` doesn't remove the elements.
diff --git a/test/tools/helper.ts b/test/tools/helper.ts
index 8188f35e..f5640d0a 100644
--- a/test/tools/helper.ts
+++ b/test/tools/helper.ts
@@ -39,7 +39,8 @@ export function getDocument(file: string): SimpleDocument {
     document.createTextNode = (content: string) => new Text(content);
     document.createElement = (name: string) =>
         new Element(name.toLowerCase(), {});
-    [document.body] = DomUtils.getElementsByTagName("body", document, true, 1);
+    const [body] = DomUtils.getElementsByTagName("body", document, true, 1);
+    document.body = body;
     const documentElement = document.children.find(isTag);
 
     assert.ok(documentElement, "Did not find document element");
diff --git a/test/tools/sizzle-testinit.ts b/test/tools/sizzle-testinit.ts
index 20bf3fd1..1e19ee3e 100755
--- a/test/tools/sizzle-testinit.ts
+++ b/test/tools/sizzle-testinit.ts
@@ -6,6 +6,7 @@ import * as helper from "./helper.js";
 let document = helper.getDocument("sizzle.html");
 
 export function loadDocument(): helper.SimpleDocument {
+    // eslint-disable-next-line unicorn/no-top-level-assignment-in-function -- Reset the shared fixture before each test.
     document = helper.getDocument("sizzle.html");
     return document;
 }