feat(eslint-config-angular): add strict rules as experimental sub-pac…

…kage (#225)

packages/eslint-config-angular/.npmignore

@@ -0,0 +1,2 @@
+**/test/**
+CHANGELOG.md

packages/eslint-config-angular/README.md

@@ -37,6 +37,10 @@ You can also include `optional` configurations, however, you are responsible for
     '@tinkoff/eslint-config-angular/line-statements',
     '@tinkoff/eslint-config-angular/member-ordering',
     '@tinkoff/eslint-config-angular/decorator-position',
+    '@tinkoff/eslint-config-angular/function-return-type',
+
+    // experimental strict rules
+    '@tinkoff/eslint-config-angular/experimental',
   ],
 }
 ```

packages/eslint-config-angular/experimental/index.js

@@ -0,0 +1,29 @@
+module.exports = {
+  overrides: [
+    {
+      files: ['*.ts'],
+      parser: '@typescript-eslint/parser',
+      plugins: ['@typescript-eslint'],
+      rules: {
+        '@typescript-eslint/ban-types': 'error',
+        '@typescript-eslint/no-base-to-string': 'error',
+        '@typescript-eslint/no-unnecessary-type-constraint': 'error',
+        '@typescript-eslint/prefer-includes': 'error',
+        '@typescript-eslint/no-for-in-array': 'error',
+        '@typescript-eslint/no-unnecessary-type-assertion': 'error',
+        '@typescript-eslint/prefer-nullish-coalescing': 'error',
+        '@typescript-eslint/prefer-optional-chain': 'error',
+        '@typescript-eslint/no-use-before-define': [
+          'error',
+          {
+            functions: false,
+            classes: false,
+            variables: true,
+            enums: true,
+            typedefs: true,
+          },
+        ],
+      },
+    },
+  ],
+};

packages/eslint-config-angular/function-return-type/index.js

@@ -0,0 +1,21 @@
+module.exports = {
+  overrides: [
+    {
+      files: ['*.ts'],
+      parser: '@typescript-eslint/parser',
+      plugins: ['@typescript-eslint'],
+      rules: {
+        '@typescript-eslint/explicit-function-return-type': [
+          'error',
+          {
+            allowExpressions: true,
+            allowTypedFunctionExpressions: true,
+            allowHigherOrderFunctions: true,
+            allowDirectConstAssertionInArrowFunctions: true,
+            allowConciseArrowFunctionExpressionsStartingWithVoid: true,
+          },
+        ],
+      },
+    },
+  ],
+};

packages/eslint-config-angular/package.json

@@ -8,19 +8,6 @@
     "eslintconfig",
     "eslint-config"
   ],
-  "files": [
-    "html",
-    "imports",
-    "line-statements",
-    "member-ordering",
-    "promise",
-    "file-progress",
-    "decorator-position",
-    "recommended",
-    "rxjs",
-    "index.js",
-    "README.md"
-  ],
   "scripts": {},
   "main": "index.js",
   "author": {

packages/eslint-config-angular/recommended/base.js

@@ -43,5 +43,8 @@ module.exports = {
       },
     ],
     eqeqeq: ['error', 'always'],
+    'no-useless-concat': 'error',
+    'prefer-template': 'error',
+    curly: ['error', 'all'],
   },
 };