Update ESLint configuration and dependency versions

backend/package-lock.json

@@ -35,7 +35,7 @@
         "@babel/core": "^7.18.5",
         "@babel/preset-env": "^7.18.2",
         "@babel/preset-typescript": "^7.24.7",
-        "@eslint/compat": "^1.2.2",
+        "@eslint/compat": "^1.4.1",
         "@eslint/eslintrc": "^3.1.0",
         "@eslint/js": "^9.13.0",
         "dotenv": "^16.4.5",
@@ -2295,16 +2295,19 @@
       }
     },
     "node_modules/@eslint/compat": {
-      "version": "1.2.2",
-      "resolved": "https://registry.npmjs.org/@eslint/compat/-/compat-1.2.2.tgz",
-      "integrity": "sha512-jhgiIrsw+tRfcBQ4BFl2C3vCrIUw2trCY0cnDvGZpwTtKCEDmZhAtMfrEUP/KpnwM6PrO0T+Ltm+ccW74olG3Q==",
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/@eslint/compat/-/compat-1.4.1.tgz",
+      "integrity": "sha512-cfO82V9zxxGBxcQDr1lfaYB7wykTa0b00mGa36FrJl7iTFd0Z2cHfEYuxcBRP/iNijCsWsEkA+jzT8hGYmv33w==",
       "dev": true,
       "license": "Apache-2.0",
+      "dependencies": {
+        "@eslint/core": "^0.17.0"
+      },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       },
       "peerDependencies": {
-        "eslint": "^9.10.0"
+        "eslint": "^8.40 || 9"
       },
       "peerDependenciesMeta": {
         "eslint": {
@@ -2312,6 +2315,19 @@
         }
       }
     },
+    "node_modules/@eslint/compat/node_modules/@eslint/core": {
+      "version": "0.17.0",
+      "resolved": "https://registry.npmjs.org/@eslint/core/-/core-0.17.0.tgz",
+      "integrity": "sha512-yL/sLrpmtDaFEiUj1osRP4TI2MDz1AddJL+jZ7KSqvBuliN4xqYY54IfdN8qD8Toa6g1iloph1fxQNkjOxrrpQ==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@types/json-schema": "^7.0.15"
+      },
+      "engines": {
+        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
+      }
+    },
     "node_modules/@eslint/config-array": {
       "version": "0.18.0",
       "resolved": "https://registry.npmjs.org/@eslint/config-array/-/config-array-0.18.0.tgz",

backend/package.json

@@ -19,7 +19,7 @@
     "@babel/core": "^7.18.5",
     "@babel/preset-env": "^7.18.2",
     "@babel/preset-typescript": "^7.24.7",
-    "@eslint/compat": "^1.2.2",
+    "@eslint/compat": "^1.4.1",
     "@eslint/eslintrc": "^3.1.0",
     "@eslint/js": "^9.13.0",
     "dotenv": "^16.4.5",

eslint.config.mjs

@@ -1,49 +1,31 @@
-import globals from 'globals'
-import cypressPlugin from 'eslint-plugin-cypress/flat'
-import prettierPlugin from 'eslint-plugin-prettier/recommended'
-import mochaPlugin from 'eslint-plugin-mocha'
+import js from "@eslint/js";
+import globals from "globals";
+import tseslint from "typescript-eslint";
+import pluginReact from "eslint-plugin-react";
+import cypressPlugin from "eslint-plugin-cypress/flat";
+import { defineConfig } from "eslint/config";
 
-// NOTE: This config is only used for running ESLint on the Cypress tests. Frontend and backend use their own configs.
+const cypressRecommended = cypressPlugin.configs.recommended;
 
-const mochaRecommended = mochaPlugin.configs.flat.recommended
-const cypressRecommended = cypressPlugin.configs.recommended
-const mochaLanguageOptions = mochaRecommended.languageOptions ?? {}
-const cypressLanguageOptions = cypressRecommended.languageOptions ?? {}
-const mochaRules = mochaRecommended.rules ?? {}
-const cypressRules = cypressRecommended.rules ?? {}
-
-/** @type {import('eslint').Linter.Config[]} */
-export default [
+export default defineConfig([
   {
-    files: ['cypress/**/*.{cy,spec}.{js,ts,tsx}'],
-    ...mochaRecommended,
-    ...cypressRecommended,
-    rules: {
-      ...mochaRules,
-      ...cypressRules,
-      'mocha/no-mocha-arrows': 'off',
-      'mocha/no-skipped-tests': 'off',
-      'mocha/max-top-level-suites': 'off',
-      'mocha/no-top-level-hooks': 'off',
-      'mocha/no-sibling-hooks': 'off',
+    files: ["**/*.{js,mjs,cjs,ts,mts,cts,jsx,tsx}"],
+    plugins: { js },
+    extends: ["js/recommended"],
+    languageOptions: { globals: { ...globals.browser, ...globals.node } },
   },
+  tseslint.configs.recommended,
+  pluginReact.configs.flat.recommended,
+  {
+    ...cypressRecommended,
+    files: ["cypress/**/*.{cy,spec}.{js,ts,tsx}"],
     languageOptions: {
-      ...mochaLanguageOptions,
-      ...cypressLanguageOptions,
+      ...cypressRecommended.languageOptions,
       globals: {
         ...globals.browser,
         ...globals.node,
-      },
-      parserOptions: {
-        ecmaVersion: 'latest',
-        sourceType: 'module',
+        ...(cypressRecommended.languageOptions?.globals ?? {}),
       },
     },
-    plugins: {
-      mocha: mochaPlugin,
-      cypress: cypressPlugin,
   },
-  },
-
-  prettierPlugin,
-]
+]);

package.json

@@ -66,18 +66,20 @@
   "author": "",
   "devDependencies": {
     "@cypress/code-coverage": "^3.13.2",
-    "@eslint/js": "^9.14.0",
+    "@eslint/js": "^9.39.1",
     "@types/leaflet": "^1.9.12",
     "cypress": "^13.11.0",
-    "eslint": "^9.14.0",
+    "eslint": "^9.39.1",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-cypress": "^4.1.0",
     "eslint-plugin-mocha": "^10.5.0",
     "eslint-plugin-prettier": "^5.2.1",
-    "globals": "^15.12.0",
+    "eslint-plugin-react": "^7.37.5",
+    "globals": "^15.15.0",
     "husky": "^9.1.7",
     "prettier": "^3.3.3",
     "supertest": "^7.0.0",
-    "typescript": "^5.9.3"
+    "typescript": "^5.9.3",
+    "typescript-eslint": "^8.47.0"
   }
 }