add git pre-commit hook to prettier code

.eslintrc.json

@@ -1,3 +1,3 @@
 {
-  "extends": "next/core-web-vitals"
+  "extends": ["next/core-web-vitals", "prettier"]
 }

.husky/pre-commit

@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+npx lint-staged

.prettierrc

@@ -0,0 +1,8 @@
+{
+  "singleQuote": true,
+  "trailingComma": "all",
+  "semi": false,
+  "tabWidth": 2,
+  "useTabs": false,
+  "printWidth": 80
+}

package.json

@@ -6,18 +6,29 @@
     "dev": "next dev",
     "build": "next build",
     "start": "next start",
-    "lint": "next lint"
+    "lint": "next lint",
+    "format": "prettier --write \"src/**/*.ts\"",
+    "prepare": "husky install"
   },
   "dependencies": {
     "@next/font": "13.1.6",
+    "next": "13.1.6",
+    "react": "18.2.0",
+    "react-dom": "18.2.0"
+  },
+  "devDependencies": {
     "@types/node": "18.13.0",
     "@types/react": "18.0.28",
     "@types/react-dom": "18.0.11",
-    "eslint": "8.34.0",
+    "eslint": "^8.34.0",
-    "eslint-config-next": "13.1.6",
+    "eslint-config-next": "^13.1.6",
-    "next": "13.1.6",
+    "eslint-config-prettier": "^8.6.0",
-    "react": "18.2.0",
+    "husky": "^8.0.0",
-    "react-dom": "18.2.0",
+    "lint-staged": "^13.1.2",
-    "typescript": "4.9.5"
+    "prettier": "2.8.4",
+    "typescript": "^4.9.5"
+  },
+  "lint-staged": {
+    "*.{ts,tsx,js,jsx,json,md}": "prettier --write"
   }
 }

src/pages/api/hello.ts

@@ -7,7 +7,7 @@ type Data = {
 
 export default function handler(
   req: NextApiRequest,
-  res: NextApiResponse<Data>
+  res: NextApiResponse<Data>,
 ) {
   res.status(200).json({ name: 'John Doe' })
 }