Prettier for formatting and some stricter linting rules

frontend/.eslintrc.cjs

@@ -3,16 +3,27 @@ module.exports = {
   env: { browser: true, es2020: true },
   extends: [
     'eslint:recommended',
-    'plugin:@typescript-eslint/recommended',
+    'plugin:@typescript-eslint/strict-type-checked',
+    'plugin:@typescript-eslint/stylistic-type-checked',
     'plugin:react-hooks/recommended',
+    'plugin:prettier/recommended',
   ],
   ignorePatterns: ['dist', '.eslintrc.cjs'],
   parser: '@typescript-eslint/parser',
-  plugins: ['react-refresh'],
+  plugins: ['react-refresh', 'prettier'],
   rules: {
+    "@typescript-eslint/explicit-function-return-type": "error",
+    "no-duplicate-imports": ["error", { includeExports: true }],
+    "import/no-named-as-default-member": "off",
     'react-refresh/only-export-components': [
       'warn',
       { allowConstantExport: true },
     ],
   },
+  parserOptions: {
+    ecmaVersion: 'latest',
+    sourceType: 'module',
+    project: ['./tsconfig.json', './tsconfig.node.json'],
+    tsconfigRootDir: __dirname,
+  },
 }

frontend/.prettierrc

@@ -0,0 +1,6 @@
+{
+    "tabWidth": 2,
+    "semi": true,
+    "singleQuote": false,
+    "bracketSameLine": false
+}

frontend/package-lock.json

@@ -18,8 +18,11 @@
         "@typescript-eslint/parser": "^6.21.0",
         "@vitejs/plugin-react-swc": "^3.5.0",
         "eslint": "^8.56.0",
+        "eslint-config-prettier": "^9.1.0",
+        "eslint-plugin-prettier": "^5.1.3",
         "eslint-plugin-react-hooks": "^4.6.0",
         "eslint-plugin-react-refresh": "^0.4.5",
+        "prettier": "3.2.5",
         "typescript": "^5.2.2",
         "vite": "^5.1.0"
       }
@@ -569,6 +572,18 @@
         "node": ">= 8"
       }
     },
+    "node_modules/@pkgr/core": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/@pkgr/core/-/core-0.1.1.tgz",
+      "integrity": "sha512-cq8o4cWH0ibXh9VGi5P20Tu9XF/0fFXl9EUinr9QfTM7a7p0oTA4iJRCQWppXR1Pg8dSM0UCItCkPwsk9qWWYA==",
+      "dev": true,
+      "engines": {
+        "node": "^12.20.0 || ^14.18.0 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/unts"
+      }
+    },
     "node_modules/@rollup/rollup-android-arm-eabi": {
       "version": "4.10.0",
       "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.10.0.tgz",
@@ -1530,6 +1545,48 @@
         "url": "https://opencollective.com/eslint"
       }
     },
+    "node_modules/eslint-config-prettier": {
+      "version": "9.1.0",
+      "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-9.1.0.tgz",
+      "integrity": "sha512-NSWl5BFQWEPi1j4TjVNItzYV7dZXZ+wP6I6ZhrBGpChQhZRUaElihE9uRRkcbRnNb76UMKDF3r+WTmNcGPKsqw==",
+      "dev": true,
+      "bin": {
+        "eslint-config-prettier": "bin/cli.js"
+      },
+      "peerDependencies": {
+        "eslint": ">=7.0.0"
+      }
+    },
+    "node_modules/eslint-plugin-prettier": {
+      "version": "5.1.3",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-prettier/-/eslint-plugin-prettier-5.1.3.tgz",
+      "integrity": "sha512-C9GCVAs4Eq7ZC/XFQHITLiHJxQngdtraXaM+LoUFoFp/lHNl2Zn8f3WQbe9HvTBBQ9YnKFB0/2Ajdqwo5D1EAw==",
+      "dev": true,
+      "dependencies": {
+        "prettier-linter-helpers": "^1.0.0",
+        "synckit": "^0.8.6"
+      },
+      "engines": {
+        "node": "^14.18.0 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/eslint-plugin-prettier"
+      },
+      "peerDependencies": {
+        "@types/eslint": ">=8.0.0",
+        "eslint": ">=8.0.0",
+        "eslint-config-prettier": "*",
+        "prettier": ">=3.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@types/eslint": {
+          "optional": true
+        },
+        "eslint-config-prettier": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/eslint-plugin-react-hooks": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/eslint-plugin-react-hooks/-/eslint-plugin-react-hooks-4.6.0.tgz",
@@ -1666,6 +1723,12 @@
       "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==",
       "dev": true
     },
+    "node_modules/fast-diff": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/fast-diff/-/fast-diff-1.3.0.tgz",
+      "integrity": "sha512-VxPP4NqbUjj6MaAOafWeUn2cXWLcCtljklUtZf0Ind4XQ+QPtmA0b18zZy0jIQx+ExRVCR/ZQpBmik5lXshNsw==",
+      "dev": true
+    },
     "node_modules/fast-glob": {
       "version": "3.3.2",
       "resolved": "https://registry.npmjs.org/fast-glob/-/fast-glob-3.3.2.tgz",
@@ -2321,6 +2384,33 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/prettier": {
+      "version": "3.2.5",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.2.5.tgz",
+      "integrity": "sha512-3/GWa9aOC0YeD7LUfvOG2NiDyhOWRvt1k+rcKhOuYnMY24iiCphgneUfJDyFXd6rZCAnuLBv6UeAULtrhT/F4A==",
+      "dev": true,
+      "bin": {
+        "prettier": "bin/prettier.cjs"
+      },
+      "engines": {
+        "node": ">=14"
+      },
+      "funding": {
+        "url": "https://github.com/prettier/prettier?sponsor=1"
+      }
+    },
+    "node_modules/prettier-linter-helpers": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/prettier-linter-helpers/-/prettier-linter-helpers-1.0.0.tgz",
+      "integrity": "sha512-GbK2cP9nraSSUF9N2XwUwqfzlAFlMNYYl+ShE/V+H8a9uNl/oUqB1w2EL54Jh0OlyRSd8RfWYJ3coVS4TROP2w==",
+      "dev": true,
+      "dependencies": {
+        "fast-diff": "^1.1.2"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/punycode": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
@@ -2560,6 +2650,22 @@
         "node": ">=8"
       }
     },
+    "node_modules/synckit": {
+      "version": "0.8.8",
+      "resolved": "https://registry.npmjs.org/synckit/-/synckit-0.8.8.tgz",
+      "integrity": "sha512-HwOKAP7Wc5aRGYdKH+dw0PRRpbO841v2DENBtjnR5HFWoiNByAl7vrx3p0G/rCyYXQsrxqtX48TImFtPcIHSpQ==",
+      "dev": true,
+      "dependencies": {
+        "@pkgr/core": "^0.1.0",
+        "tslib": "^2.6.2"
+      },
+      "engines": {
+        "node": "^14.18.0 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/unts"
+      }
+    },
     "node_modules/text-table": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/text-table/-/text-table-0.2.0.tgz",
@@ -2590,6 +2696,12 @@
         "typescript": ">=4.2.0"
       }
     },
+    "node_modules/tslib": {
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.6.2.tgz",
+      "integrity": "sha512-AEYxH93jGFPn/a2iVAwW87VuUIkR1FVUKB77NwMF7nBTDkDrrT/Hpt/IrCJ0QXhW27jTBDcf5ZY7w6RiqTMw2Q==",
+      "dev": true
+    },
     "node_modules/type-check": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",

frontend/package.json

@@ -7,7 +7,8 @@
     "dev": "vite",
     "build": "tsc && vite build",
     "lint": "eslint . --ext ts,tsx --report-unused-disable-directives --max-warnings 0",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "format": "prettier --config .prettierrc '**/*.ts' '**/*.tsx' '**/*.js' '**/*.json' --write"
   },
   "dependencies": {
     "react": "^18.2.0",
@@ -20,8 +21,11 @@
     "@typescript-eslint/parser": "^6.21.0",
     "@vitejs/plugin-react-swc": "^3.5.0",
     "eslint": "^8.56.0",
+    "eslint-config-prettier": "^9.1.0",
+    "eslint-plugin-prettier": "^5.1.3",
     "eslint-plugin-react-hooks": "^4.6.0",
     "eslint-plugin-react-refresh": "^0.4.5",
+    "prettier": "3.2.5",
     "typescript": "^5.2.2",
     "vite": "^5.1.0"
   }

frontend/src/App.tsx

@@ -1,10 +1,10 @@
-import { useState } from 'react'
+import { useState } from "react";
-import reactLogo from './assets/react.svg'
+import reactLogo from "./assets/react.svg";
-import viteLogo from '/vite.svg'
+import viteLogo from "/vite.svg";
-import './App.css'
+import "./App.css";
 
-function App() {
+function App(): JSX.Element {
-  const [count, setCount] = useState(0)
+  const [count, setCount] = useState(0);
 
   return (
     <>
@@ -18,7 +18,11 @@ function App() {
       </div>
       <h1>Vite + React</h1>
       <div className="card">
-        <button onClick={() => setCount((count) => count + 1)}>
+        <button
+          onClick={() => {
+            setCount((count) => count + 1);
+          }}
+        >
           count is {count}
         </button>
         <p>
@@ -29,7 +33,7 @@ function App() {
         Click on the Vite and React logos to learn more
       </p>
     </>
-  )
+  );
 }
 
-export default App
+export default App;

frontend/src/main.tsx

@@ -1,10 +1,12 @@
-import React from 'react'
+import React from "react";
-import ReactDOM from 'react-dom/client'
+import ReactDOM from "react-dom/client";
-import App from './App.tsx'
+import App from "./App.tsx";
-import './index.css'
+import "./index.css";
 
-ReactDOM.createRoot(document.getElementById('root')!).render(
+const root = document.getElementById("root") ?? document.createElement("div");
+
+ReactDOM.createRoot(root).render(
   <React.StrictMode>
     <App />
   </React.StrictMode>,
-)
+);

frontend/vite.config.ts

@@ -1,7 +1,7 @@
-import { defineConfig } from 'vite'
+import { defineConfig } from "vite";
-import react from '@vitejs/plugin-react-swc'
+import react from "@vitejs/plugin-react-swc";
 
 // https://vitejs.dev/config/
 export default defineConfig({
   plugins: [react()],
-})
+});