feat: add build.transpile to transpile npm packages

lib/builder/webpack/base.js

@@ -40,7 +40,6 @@ export default class WebpackBaseConfig {
       ]
     }
 
-    delete options.exclude
     return options
   }
 
@@ -140,7 +139,25 @@ export default class WebpackBaseConfig {
       },
       {
         test: /\.jsx?$/,
-        exclude: this.options.build.babel.exclude,
+        exclude: file => {
+          // not exclude files outside node_modules
+          if (/node_modules/.test(file)) {
+            let transpile = this.options.build.transpile || []
+            // transpile supports string like 'vue-lib'
+            if (!Array.isArray(transpile)) {
+              transpile = [transpile]
+            }
+            // include SFCs in node_modules
+            transpile.push(/\.vue\.js/)
+            for (let pkg of transpile) {
+              // item in transpile can be string or regex object
+              if (new RegExp(pkg).test(file)) {
+                return false
+              }
+            }
+            return true
+          }
+        },
         use: perfLoader.pool('js', {
           loader: 'babel-loader',
           options: this.getBabelOptions()

lib/common/nuxt.config.js

@@ -61,12 +61,9 @@ export default {
     },
     babel: {
       babelrc: false,
-      cacheDirectory: undefined,
+      cacheDirectory: undefined
-      exclude: file => (
-        /node_modules/.test(file) &&
-        !/\.vue\.js/.test(file)
-      )
     },
+    transpile: [], // Name of NPM packages to be transpiled
     vueLoader: {},
     postcss: {},
     templates: [],