move defaultLoaders to module.exports to prevent that in mutiple webpack build situations, previous defaultLoaders configuration will be cached and apply to following builds, which would ignore following webpack.vue options such as cssSourceMap: false

Author: 弘树

lib/loader.js

@@ -11,19 +11,20 @@ var defaultLang = {
   script: 'js'
 }
 
-var defaultLoaders = {
-  html: 'vue-html-loader',
-  css: 'vue-style-loader!css-loader',
-  js: 'babel-loader?presets[]=es2015&plugins[]=transform-runtime&comments=false'
-}
-
 var rewriterInjectRE = /\b((css|(vue-)?html)(-loader)?(\?[^!]+)?!?)\b/
 var rewriters = {
   template: require.resolve('./template-rewriter'),
   style: require.resolve('./style-rewriter')
 }
 
 module.exports = function (content) {
+
+  var defaultLoaders = {
+    html: 'vue-html-loader',
+    css: 'vue-style-loader!css-loader',
+    js: 'babel-loader?presets[]=es2015&plugins[]=transform-runtime&comments=false'
+  }
+  
   this.cacheable()
   var loaderContext = this
   var options = this.options.vue || {}