diff --git a/frontend/package.json b/frontend/package.json
index 5cd4c1f81ece93f589a05cda39b66540a62d5990..57dc9b6da20359fb2ddbfd2f84ed6f48c27b9da0 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -8,7 +8,9 @@
     "release": "cross-env NODE_ENV=production node ./tool/build.js",
     "build": "cross-env NODE_ENV=dev node ./tool/build.js",
     "dev": "cross-env NODE_ENV=dev node tool/dev-server.js",
-    "lint": "./node_modules/fecs/bin/fecs --rule"
+    "lint": "./node_modules/fecs/bin/fecs --rule",
+    "precommit": "npm run lint",
+    "prepush": "npm run lint"
   },
   "engines": {
     "node": ">= 6.4.0"
@@ -52,6 +54,7 @@
     "html-loader": "^0.4.4",
     "html-webpack-plugin": "^2.28.0",
     "http-proxy-middleware": "^0.17.4",
+    "husky": "^0.14.3",
     "json-loader": "^0.5.4",
     "opn": "^5.1.0",
     "optimize-css-assets-webpack-plugin": "^1.3.2",
diff --git a/frontend/tool/build.js b/frontend/tool/build.js
index 2590b88715b1f46b56117fb645f3bbd17c44a720..d8a67b1f106f82df771200a8c6bb096c441d77cc 100644
--- a/frontend/tool/build.js
+++ b/frontend/tool/build.js
@@ -1,4 +1,3 @@
-"use strict";
 const webpack = require('webpack');
 const rm = require('rimraf');
 const ora = require('ora');
diff --git a/frontend/tool/entry.js b/frontend/tool/entry.js
index aba7919bc8050be1642accdd0427192881622aef..78754c6a5dc394ade713c1522657690d9be3b3fc 100644
--- a/frontend/tool/entry.js
+++ b/frontend/tool/entry.js
@@ -1,4 +1,3 @@
-"use strict";
 const path = require('path');
 const projectPath = path.resolve(__dirname, '..');
 const HtmlWebpackPlugin = require('html-webpack-plugin');
diff --git a/frontend/tool/webpack.config.js b/frontend/tool/webpack.config.js
index 90115251fd425caf901731bc815c64b3426183f3..24764208c456bb784655b5934e7c272782abf101 100644
--- a/frontend/tool/webpack.config.js
+++ b/frontend/tool/webpack.config.js
@@ -1,4 +1,3 @@
-"use strict";
 const webpack = require('webpack');
 const path = require('path');
 const projectPath = path.resolve(__dirname, '..');
diff --git a/frontend/tool/webpack.prod.config.js b/frontend/tool/webpack.prod.config.js
index 3d8bbbbcbc06da2c3c2efbc8b9bf0c40593eafa0..fa73c7837ef2a7ea12803ba5d6885f01520bbc8b 100644
--- a/frontend/tool/webpack.prod.config.js
+++ b/frontend/tool/webpack.prod.config.js
@@ -1,4 +1,3 @@
-"use strict";
 const webpack = require('webpack');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
 const path = require('path');
diff --git a/visualdl/python/test_storage.py b/visualdl/python/test_storage.py
index 413ac306ce09fd4adfae5e3a751ae5e545ad9c73..328ee74efdacd4c429055ef0eff2d218360ba401 100644
--- a/visualdl/python/test_storage.py
+++ b/visualdl/python/test_storage.py
@@ -4,13 +4,15 @@ import unittest
 import random
 import time
 
+
 class StorageTest(unittest.TestCase):
     def setUp(self):
         self.dir = "./tmp/storage_test"
 
     def test_read(self):
         print 'test write'
-        self.writer = storage.StorageWriter(self.dir, sync_cycle=1).as_mode("train")
+        self.writer = storage.StorageWriter(
+            self.dir, sync_cycle=1).as_mode("train")
         scalar = self.writer.scalar("model/scalar/min")
         # scalar.set_caption("model/scalar/min")
         for i in range(10):