diff --git a/ace-loader/copy_deps_source.js b/ace-loader/copy_deps_source.js
index 4b8d830..e0e924f 100644
--- a/ace-loader/copy_deps_source.js
+++ b/ace-loader/copy_deps_source.js
@@ -12,6 +12,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 const fs = require('fs');
 const path = require('path');
 const moduleSource = require('./module-source');
@@ -21,46 +22,51 @@ const exists = function(src, dst, callback) {
     return;
   }
   fs.exists(dst, function(exists) {
-    if(exists){
+    if (exists) {
       callback(src, dst);
-    } else{
+    } else {
       fs.mkdir(dst, function() {
           callback(src, dst);
       });
     }
   });
-}
+};
 
 stat = fs.stat;
-const copy = function(src, dst){
-  fs.readdir(src, function(err, paths){
-      if(err){
+const copy = function(src, dst) {
+  fs.readdir(src, function(err, paths) {
+      if (err) {
           throw err;
       }
-      paths.forEach(function(_path){
-          var _src = src + '/' + _path,
-              _dst = dst + '/' + _path,
-              readable, writable;
-          stat(_src, function(err, st){
-            if(err){
-                throw err;
-            }
-            if(st.isFile()){
-              const pathInfo = path.parse(_src);
-              if (pathInfo.name === 'gulpfile' || pathInfo.ext !== '.js') {
-                return;
-              }
-              readable = fs.createReadStream(_src);
-              writable = fs.createWriteStream(_dst);
-              readable.pipe(writable);
-            } else if(st.isDirectory()){
-              exists(_src, _dst, copy);
-            }
-          });
+      paths.forEach(function(_path) {
+        copyForEach(src, dst, _path);
       });
   });
 };
 
+function copyForEach(src, dst, _path) {
+  let _src = src + '/' + _path;
+  let _dst = dst + '/' + _path;
+  let readable = null;
+  let writable = null;
+  stat(_src, function(err, st) {
+    if (err) {
+        throw err;
+    }
+    if (st.isFile()) {
+      const pathInfo = path.parse(_src);
+      if (pathInfo.name === 'gulpfile' || pathInfo.ext !== '.js') {
+        return;
+      }
+      readable = fs.createReadStream(_src);
+      writable = fs.createWriteStream(_dst);
+      readable.pipe(writable);
+    } else if (st.isDirectory()) {
+      exists(_src, _dst, copy);
+    }
+  });
+}
+
 moduleSource.copyResource(path.resolve(__dirname, './third_party/weex-loader/deps/weex-scripter'), process.argv[2] + '/scripter');
 moduleSource.copyResource(path.resolve(__dirname, './third_party/weex-loader/deps/weex-styler'), process.argv[2] + '/styler');
 moduleSource.copyResource(path.resolve(__dirname, './third_party/parse5/packages/parse5/dist/cjs'), process.argv[2] + '/parse');
diff --git a/ace-loader/module-source.js b/ace-loader/module-source.js
index e1701e7..63eca0d 100644
--- a/ace-loader/module-source.js
+++ b/ace-loader/module-source.js
@@ -71,4 +71,4 @@ copyResource(path.resolve(__dirname, './plugin/codegen'), process.argv[2] + '/co
 
 module.exports = {
   copyResource
-}
+};