add pre commit hook for auto js linting

.babelrc

@@ -1,3 +1,4 @@
 {
-  "presets": ["@babel/preset-env"]
+  "presets": ["@babel/preset-env"],
+  "plugins": ["@babel/plugin-proposal-class-properties"]
 }

.eslintrc.json

@@ -0,0 +1,27 @@
+{
+    "env": {
+        "browser": true,
+        "es6": true
+    },
+    "extends": "eslint:recommended",
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly",
+        "HttpClient": "readonly",
+        "UtilRegistry": "readonly",
+        "HtmlHelpers": "readonly",
+        "I18n": "readonly",
+        "flatpickr": "readonly",
+        "$": "readonly"
+    },
+    "parser": "babel-eslint",
+    "parserOptions": {
+        "ecmaVersion": 2018
+    },
+    "rules": {
+        "no-console": "off",
+        "no-extra-semi": "off",
+        "semi": ["error", "always"],
+        "comma-dangle": ["error", "always-multiline"]
+    }
+}

package.json

@@ -2,17 +2,34 @@
   "name": "uni2work",
   "version": "1.0.0",
   "description": "",
-  "scripts": {
-    "watch": "watch babel static/es",
-    "babel": "babel static/es -d static/js"
-  },
   "keywords": [],
   "author": "",
   "license": "ISC",
+  "scripts": {
+    "babel": "babel static/es -d static/js",
+    "babel:watch": "watch 'npm run babel' static/es",
+    "lint": "eslint static/es"
+  },
+  "husky": {
+    "hooks": {
+      "pre-commit": "lint-staged"
+    }
+  },
+  "lint-staged": {
+    "static/es/**/*.js": [
+      "eslint",
+      "git add"
+    ]
+  },
   "devDependencies": {
     "@babel/cli": "^7.4.4",
     "@babel/core": "^7.4.5",
-    "watch": "^1.0.2",
-    "@babel/preset-env": "^7.4.5"
+    "@babel/plugin-proposal-class-properties": "^7.4.4",
+    "@babel/preset-env": "^7.4.5",
+    "babel-eslint": "^10.0.1",
+    "eslint": "^5.16.0",
+    "husky": "^2.3.0",
+    "lint-staged": "^8.1.7",
+    "watch": "^1.0.2"
   }
 }