4 configure linting (#12)

* create eslint from template

* ignore build

* configure plugin and fix an issue

* use old config instead of crippy old one

* correct github action

* fix eslint resolver error

* fix eslint issues

* fix eslint issues

.eslintrc.json

@@ -0,0 +1,44 @@
+{
+    "env": {
+      "browser": true,
+      "es2021": true,
+      "jest": true
+    },
+    "extends": [
+      "plugin:react/recommended",
+      "plugin:@typescript-eslint/recommended",
+      "prettier",
+      "plugin:prettier/recommended",
+      "plugin:import/recommended"
+    ],
+    "overrides": [],
+    "parser": "@typescript-eslint/parser",
+    "parserOptions": {
+      "ecmaFeatures": {
+        "jsx": true
+      },
+      "ecmaVersion": 12,
+      "sourceType": "module"
+    },
+    "plugins": [ "react", "@typescript-eslint", "react-hooks" ],
+    "rules": {
+      "no-use-before-define": "off",
+      "@typescript-eslint/no-use-before-define": [ "error" ],
+      "react/jsx-filename-extension": [ "warn", { "extensions": [ ".tsx" ] } ],
+      "import/extensions": [ "error", "ignorePackages", { "ts": "never", "tsx": "never" } ],
+      "no-shadow": "off",
+      "@typescript-eslint/no-shadow": [ "error" ],
+      "@typescript-eslint/explicit-function-return-type": [ "error", { "allowExpressions": true } ],
+      "max-len": [ "warn", { "code": 100, "ignoreComments": true, "ignoreUrls": true } ],
+      "react-hooks/rules-of-hooks": "error",
+      "react-hooks/exhaustive-deps": "warn",
+      "import/prefer-default-export": "off",
+      "react/prop-types": "off",
+      "prettier/prettier": [ "error", { "endOfLine": "auto" } ]
+    },
+    "settings": {
+      "import/resolver": {
+        "typescript": {}
+      }
+    }
+  }

.github/workflows/main.yml

@@ -40,6 +40,9 @@ jobs:
     - name: Install dependencies
       run: npm ci
 
+    - name: Run eslint
+      run: npm run lint
+
     - name: Run tests
       run: npm test
 

.vscode/extensions.json

@@ -0,0 +1,5 @@
+{
+    "recommendations": [
+        "dbaeumer.vscode-eslint"
+    ]
+}