add helpers

Author: 38elements

packages/create-instance/create-instance.js

@@ -75,10 +75,9 @@ export default function createInstance (
         if (scopedSlotFn) {
           props = { ...bindObject, ...props }
           const proxy = {}
-          Object.keys(vm._renderProxy).concat(Object.keys(Vue.prototype)).forEach((key) => {
-            if (key[0] === '_') {
-              proxy[key] = vm._renderProxy[key]
-            }
+          const helpers = ['_c', '_o', '_n', '_s', '_l', '_t', '_q', '_i', '_m', '_f', '_k', '_b', '_v', '_e', '_u', '_g']
+          helpers.forEach((key) => {
+            proxy[key] = vm._renderProxy[key]
           })
           proxy[slotScope] = props
           return scopedSlotFn.call(proxy)