lint-staged

.lintstagedrc

@@ -0,0 +1,11 @@
+{
+  "linters": {
+    "*.js": [
+      "eslint"
+    ],
+    "*.+(js|jsx|json|yml|yaml|css|less|scss|ts|tsx|md|graphql|mdx)": [
+      "prettier --write",
+      "git add"
+    ]
+  }
+}

package.json

@@ -8,7 +8,8 @@
     "flow": "flow",
     "format": "npm run prettier -- --write",
     "prettier": "prettier \"**/*.+(js|jsx|json|yml|yaml|css|less|scss|ts|tsx|md|graphql|mdx)\"",
-    "validate": "npm run lint && npm run prettier -- --list-different && npm run flow"
+    "validate": "npm run lint && npm run prettier -- --list-different && npm run flow",
+    "precommit": "lint-staged && npm run flow"
   },
   "keywords": [],
   "author": "Kent C. Dodds <kent@doddsfamily.us> (http://kentcdodds.com/)",
@@ -18,6 +19,8 @@
     "eslint": "^5.5.0",
     "eslint-config-prettier": "^3.0.1",
     "flow-bin": "^0.81.0",
+    "husky": "^0.14.3",
+    "lint-staged": "^7.2.2",
     "prettier": "^1.14.2"
   }
 }