diff --git a/showcase/package-lock.json b/showcase/package-lock.json
index 44f9e3dcaa..492be122e4 100644
--- a/showcase/package-lock.json
+++ b/showcase/package-lock.json
@@ -52,7 +52,7 @@
         "browserstack-local": "~1.5.1",
         "cross-env": "~7.0.3",
         "eslint-config-prettier": "^8.8.0",
-        "eslint-plugin-sonarjs": "^0.19.0",
+        "eslint-plugin-sonarjs": "^4.0.0",
         "find-root": "~1.1.0",
         "npm-run-all": "~4.1.5",
         "parse5": "~7.1.2",
@@ -3633,10 +3633,11 @@
       }
     },
     "node_modules/@eslint-community/regexpp": {
-      "version": "4.12.1",
-      "resolved": "https://registry.npmjs.org/@eslint-community/regexpp/-/regexpp-4.12.1.tgz",
-      "integrity": "sha512-CCZCDJuduB9OUkFkY2IgppNZMi2lBQgD2qzwXkEia16cge2pijY/aXi96CJMquDMn3nJdlPV1A5KrJEXwfLNzQ==",
+      "version": "4.12.2",
+      "resolved": "https://registry.npmjs.org/@eslint-community/regexpp/-/regexpp-4.12.2.tgz",
+      "integrity": "sha512-EriSTlt5OC9/7SXkRSCAhfSxxoSUgBm33OH+IkwbdpgoqsSsUg7y3uh+IICI/Qg4BBWr3U2i39RpmycbxMq4ew==",
       "dev": true,
+      "license": "MIT",
       "engines": {
         "node": "^12.0.0 || ^14.0.0 || >=16.0.0"
       }
@@ -10786,15 +10787,119 @@
       }
     },
     "node_modules/eslint-plugin-sonarjs": {
-      "version": "0.19.0",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-sonarjs/-/eslint-plugin-sonarjs-0.19.0.tgz",
-      "integrity": "sha512-6+s5oNk5TFtVlbRxqZN7FIGmjdPCYQKaTzFPmqieCmsU1kBYDzndTeQav0xtQNwZJWu5awWfTGe8Srq9xFOGnw==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-sonarjs/-/eslint-plugin-sonarjs-4.0.0.tgz",
+      "integrity": "sha512-ihyH9HO52OeeWer/gWRndkW/ZhGqx9HDg+Iptu+ApSfiomT2LzhHgHCoyJrhh7DjCyKhjU3Hmmz1pzcXRf7B3g==",
       "dev": true,
+      "license": "LGPL-3.0-only",
+      "dependencies": {
+        "@eslint-community/regexpp": "4.12.2",
+        "builtin-modules": "3.3.0",
+        "bytes": "3.1.2",
+        "functional-red-black-tree": "1.0.1",
+        "globals": "17.3.0",
+        "jsx-ast-utils-x": "0.1.0",
+        "lodash.merge": "4.6.2",
+        "minimatch": "10.2.1",
+        "scslre": "0.3.0",
+        "semver": "7.7.4",
+        "ts-api-utils": "2.4.0",
+        "typescript": ">=5"
+      },
+      "peerDependencies": {
+        "eslint": "^8.0.0 || ^9.0.0 || ^10.0.0"
+      }
+    },
+    "node_modules/eslint-plugin-sonarjs/node_modules/balanced-match": {
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-4.0.4.tgz",
+      "integrity": "sha512-BLrgEcRTwX2o6gGxGOCNyMvGSp35YofuYzw9h1IMTRmKqttAZZVU67bdb9Pr2vUHA8+j3i2tJfjO6C6+4myGTA==",
+      "dev": true,
+      "license": "MIT",
       "engines": {
-        "node": ">=14"
+        "node": "18 || 20 || >=22"
+      }
+    },
+    "node_modules/eslint-plugin-sonarjs/node_modules/brace-expansion": {
+      "version": "5.0.3",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-5.0.3.tgz",
+      "integrity": "sha512-fy6KJm2RawA5RcHkLa1z/ScpBeA762UF9KmZQxwIbDtRJrgLzM10depAiEQ+CXYcoiqW1/m96OAAoke2nE9EeA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "balanced-match": "^4.0.2"
+      },
+      "engines": {
+        "node": "18 || 20 || >=22"
+      }
+    },
+    "node_modules/eslint-plugin-sonarjs/node_modules/globals": {
+      "version": "17.3.0",
+      "resolved": "https://registry.npmjs.org/globals/-/globals-17.3.0.tgz",
+      "integrity": "sha512-yMqGUQVVCkD4tqjOJf3TnrvaaHDMYp4VlUSObbkIiuCPe/ofdMBFIAcBbCSRFWOnos6qRiTVStDwqPLUclaxIw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/eslint-plugin-sonarjs/node_modules/minimatch": {
+      "version": "10.2.1",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-10.2.1.tgz",
+      "integrity": "sha512-MClCe8IL5nRRmawL6ib/eT4oLyeKMGCghibcDWK+J0hh0Q8kqSdia6BvbRMVk6mPa6WqUa5uR2oxt6C5jd533A==",
+      "dev": true,
+      "license": "BlueOak-1.0.0",
+      "dependencies": {
+        "brace-expansion": "^5.0.2"
+      },
+      "engines": {
+        "node": "20 || >=22"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/isaacs"
+      }
+    },
+    "node_modules/eslint-plugin-sonarjs/node_modules/semver": {
+      "version": "7.7.4",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.4.tgz",
+      "integrity": "sha512-vFKC2IEtQnVhpT78h1Yp8wzwrf8CM+MzKMHGJZfBtzhZNycRFnXsHk6E5TxIkkMsgNS7mdX3AGB7x2QM2di4lA==",
+      "dev": true,
+      "license": "ISC",
+      "bin": {
+        "semver": "bin/semver.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/eslint-plugin-sonarjs/node_modules/ts-api-utils": {
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/ts-api-utils/-/ts-api-utils-2.4.0.tgz",
+      "integrity": "sha512-3TaVTaAv2gTiMB35i3FiGJaRfwb3Pyn/j3m/bfAvGe8FB7CF6u+LMYqYlDh7reQf7UNvoTvdfAqHGmPGOSsPmA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18.12"
       },
       "peerDependencies": {
-        "eslint": "^5.0.0 || ^6.0.0 || ^7.0.0 || ^8.0.0"
+        "typescript": ">=4.8.4"
+      }
+    },
+    "node_modules/eslint-plugin-sonarjs/node_modules/typescript": {
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
       }
     },
     "node_modules/eslint-plugin-unicorn": {
@@ -11901,6 +12006,13 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/functional-red-black-tree": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/functional-red-black-tree/-/functional-red-black-tree-1.0.1.tgz",
+      "integrity": "sha512-dsKNQNdj6xA3T+QlADDA7mOSlX0qiMINjn0cgr+eGHGsbSHzTabcIogz2+p/iqP1Xs6EP/sS2SbqH+brGTbq0g==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/functions-have-names": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/functions-have-names/-/functions-have-names-1.2.3.tgz",
@@ -14260,6 +14372,16 @@
         "node": ">=0.6.0"
       }
     },
+    "node_modules/jsx-ast-utils-x": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/jsx-ast-utils-x/-/jsx-ast-utils-x-0.1.0.tgz",
+      "integrity": "sha512-eQQBjBnsVtGacsG9uJNB8qOr3yA8rga4wAaGG1qRcBzSIvfhERLrWxMAM1hp5fcS6Abo8M4+bUBTekYR0qTPQw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
+      }
+    },
     "node_modules/jszip": {
       "version": "3.10.1",
       "resolved": "https://registry.npmjs.org/jszip/-/jszip-3.10.1.tgz",
@@ -19291,6 +19413,19 @@
         "node": ">=8"
       }
     },
+    "node_modules/refa": {
+      "version": "0.12.1",
+      "resolved": "https://registry.npmjs.org/refa/-/refa-0.12.1.tgz",
+      "integrity": "sha512-J8rn6v4DBb2nnFqkqwy6/NnTYMcgLA+sLr0iIO41qpv0n+ngb7ksag2tMRl0inb1bbO/esUwzW1vbJi7K0sI0g==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@eslint-community/regexpp": "^4.8.0"
+      },
+      "engines": {
+        "node": "^12.0.0 || ^14.0.0 || >=16.0.0"
+      }
+    },
     "node_modules/reflect-metadata": {
       "version": "0.2.2",
       "resolved": "https://registry.npmjs.org/reflect-metadata/-/reflect-metadata-0.2.2.tgz",
@@ -19356,6 +19491,20 @@
       "integrity": "sha512-TVILVSz2jY5D47F4mA4MppkBrafEaiUWJO/TcZHEIuI13AqoZMkK1WMA4Om1YkYbTx+9Ki1/tSUXbceyr9saRg==",
       "dev": true
     },
+    "node_modules/regexp-ast-analysis": {
+      "version": "0.7.1",
+      "resolved": "https://registry.npmjs.org/regexp-ast-analysis/-/regexp-ast-analysis-0.7.1.tgz",
+      "integrity": "sha512-sZuz1dYW/ZsfG17WSAG7eS85r5a0dDsvg+7BiiYR5o6lKCAtUrEwdmRmaGF6rwVj3LcmAeYkOWKEPlbPzN3Y3A==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@eslint-community/regexpp": "^4.8.0",
+        "refa": "^0.12.1"
+      },
+      "engines": {
+        "node": "^12.0.0 || ^14.0.0 || >=16.0.0"
+      }
+    },
     "node_modules/regexp-tree": {
       "version": "0.1.27",
       "resolved": "https://registry.npmjs.org/regexp-tree/-/regexp-tree-0.1.27.tgz",
@@ -20005,6 +20154,21 @@
         "url": "https://opencollective.com/webpack"
       }
     },
+    "node_modules/scslre": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/scslre/-/scslre-0.3.0.tgz",
+      "integrity": "sha512-3A6sD0WYP7+QrjbfNA2FN3FsOaGGFoekCVgTyypy53gPxhbkCIjtO6YWgdrfM+n/8sI8JeXZOIxsHjMTNxQ4nQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@eslint-community/regexpp": "^4.8.0",
+        "refa": "^0.12.0",
+        "regexp-ast-analysis": "^0.7.0"
+      },
+      "engines": {
+        "node": "^14.0.0 || >=16.0.0"
+      }
+    },
     "node_modules/secure-compare": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/secure-compare/-/secure-compare-3.0.1.tgz",
diff --git a/showcase/package.json b/showcase/package.json
index 05f0309fdd..428c903d20 100644
--- a/showcase/package.json
+++ b/showcase/package.json
@@ -143,7 +143,7 @@
     "browserstack-local": "~1.5.1",
     "cross-env": "~7.0.3",
     "eslint-config-prettier": "^8.8.0",
-    "eslint-plugin-sonarjs": "^0.19.0",
+    "eslint-plugin-sonarjs": "^4.0.0",
     "find-root": "~1.1.0",
     "npm-run-all": "~4.1.5",
     "parse5": "~7.1.2",