diff --git a/.eslintrc.js b/.eslintrc.js
index c6ff795d21..6fd75af112 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -14,9 +14,12 @@ module.exports = {
     'swan': false,
     'Component': false,
     'Page': false,
-    'App': false
+    'App': false,
+    '__mpx_mode__': false,
+    'getRegExp': false
   },
   rules: {
-    'no-cond-assign': 0
+    'no-cond-assign': 0,
+    "camelcase": ['error', {'allow': ['__mpx_mode__', '__swan_exports_map__']}]
   }
 }
diff --git a/packages/webpack-plugin/lib/runtime/injectHelper.wxs b/packages/webpack-plugin/lib/runtime/injectHelper.wxs
index e37b3b8a06..464ba890ed 100644
--- a/packages/webpack-plugin/lib/runtime/injectHelper.wxs
+++ b/packages/webpack-plugin/lib/runtime/injectHelper.wxs
@@ -77,13 +77,12 @@ function concat (a, b) {
   return a ? b ? (a + ' ' + b) : a : (b || '')
 }
 
-
 function isObject (obj) {
   return obj !== null && typeof obj === 'object'
 }
 
 function likeArray (arr) {
-  return arr.constructor === 'Array'
+  return arr && arr.constructor === 'Array'
 }
 
 function isDef (v) {
@@ -91,7 +90,7 @@ function isDef (v) {
 }
 
 function stringifyClass (value) {
-  if (value === undefined) return ''
+  if (!value) return ''
   if (likeArray(value)) {
     return stringifyArray(value)
   }
@@ -179,7 +178,7 @@ function mergeObjectArray (arr) {
 }
 
 function normalizeDynamicStyle (value) {
-  if (value === undefined) return {}
+  if (!value) return {}
   if (likeArray(value)) {
     return mergeObjectArray(value)
   }