chore(many): upgrade Typescript

.github/workflows/actions/build-react-router/action.yml

@@ -32,6 +32,12 @@ runs:
       run: npm run build
       shell: bash
       working-directory: ./packages/react-router
+    - name: Clean package.json updates
+      run: git checkout ./core/package.json ./packages/react/package.json
+      shell: bash
+    - name: 🔍 Check Diff
+      run: git diff --exit-code
+      shell: bash
     - uses: ./.github/workflows/actions/upload-archive
       with:
         name: ionic-react-router

.github/workflows/actions/build-vue-router/action.yml

@@ -32,6 +32,12 @@ runs:
       run: npm run build
       shell: bash
       working-directory: ./packages/vue-router
+    - name: Clean package.json updates
+      run: git checkout ./core/package.json
+      shell: bash
+    - name: 🔍 Check Diff
+      run: git diff --exit-code
+      shell: bash
     - uses: ./.github/workflows/actions/upload-archive
       with:
         name: ionic-vue-router

core/eslint.config.js

@@ -0,0 +1,73 @@
+const js = require('@eslint/js');
+const { FlatCompat } = require('@eslint/eslintrc');
+
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+});
+
+/*
+  The shared @ionic/eslint-config and the local custom-rules plugin are still
+  authored in eslintrc format, so the previous config is bridged through
+  FlatCompat. Configs without their own files scope are limited to TS files to
+  match the previous `eslint src` behavior and keep the parser off plain JS
+  files like this config.
+*/
+module.exports = [
+  {
+    ignores: [
+      'dist/**',
+      'src/components.d.ts',
+      '**/test/**/*.spec.ts',
+      '**/test/**/*.spec.tsx',
+      '**/test/**/e2e.ts',
+    ],
+  },
+  ...compat
+    .config({
+      env: {
+        browser: true,
+        es2021: true,
+        node: true,
+      },
+      extends: [
+        'eslint:recommended',
+        'plugin:@typescript-eslint/recommended',
+        '@ionic/eslint-config/recommended',
+        'prettier',
+      ],
+      parser: '@typescript-eslint/parser',
+      parserOptions: {
+        ecmaVersion: 'latest',
+        sourceType: 'module',
+        project: 'tsconfig.json',
+        tsconfigRootDir: __dirname,
+      },
+      plugins: ['@typescript-eslint', 'custom-rules'],
+      rules: {
+        '@typescript-eslint/explicit-module-boundary-types': 'off',
+        '@typescript-eslint/ban-ts-comment': 'off',
+        '@typescript-eslint/prefer-optional-chain': 'off',
+        '@typescript-eslint/no-unused-vars': ['warn', { varsIgnorePattern: '^(h|Fragment)$' }],
+        'no-useless-catch': 'off',
+        '@typescript-eslint/no-non-null-assertion': 'off',
+        'no-case-declarations': 'off',
+        '@typescript-eslint/strict-boolean-expressions': [
+          'error',
+          { allowNullableBoolean: true, allowNullableString: true, allowAny: true },
+        ],
+        '@typescript-eslint/no-unused-expressions': ['error', { allowShortCircuit: true, allowTernary: true }],
+        'custom-rules/no-component-on-ready-method': 'error',
+      },
+      overrides: [
+        {
+          files: ['*.e2e.ts'],
+          rules: {
+            'custom-rules/await-playwright-promise-assertion': 'error',
+            'custom-rules/no-playwright-to-match-snapshot-assertion': 'error',
+          },
+        },
+      ],
+    })
+    .map((config) => (config.files ? config : { ...config, files: ['**/*.ts', '**/*.tsx'] })),
+];