message: expose $ssrContext
diff: @@ -8,6 +8,12 @@ Object.defineProperty(Vue.prototype, '$isServer', {
  get: isServerRendering
  })
  +Object.defineProperty(Vue.prototype, '$ssrContext', {
  + get () {
  + return this.$vnode.ssrContext
  + }
  +})
  +
  Vue.version = '__VERSION__'
  export default Vue
  