fix(ssr): missing ssr helpers, closes #378

Author: Guillaume Chau

ssr/consts.js

@@ -1,8 +1,4 @@
 exports.VM_HELPERS = [
-  '_ssrAttr',
-  '_ssrNode',
-  '_ssrEscape',
-  '_ssrList',
   '_o',
   '_n',
   '_s',
@@ -19,6 +15,17 @@ exports.VM_HELPERS = [
   '_g',
 ]
 
+exports.SSR_HELPERS = [
+  '_ssrNode',
+  '_ssrEscape',
+  '_ssrList',
+  '_ssrStyle',
+  '_ssrClass',
+  '_ssrAttr',
+  '_ssrAttrs',
+  '_ssrDOMProps',
+]
+
 exports.COMPONENT_BLACKLIST = [
   'router-link',
   'router-view',

ssr/index.js

@@ -1,8 +1,12 @@
 const chalk = require('chalk')
 const { VUE_APOLLO_QUERY_KEYWORDS } = require('../lib/consts')
-const { VM_HELPERS, COMPONENT_BLACKLIST } = require('./consts')
+const { VM_HELPERS, SSR_HELPERS, COMPONENT_BLACKLIST } = require('./consts')
 const { Globals, getMergedDefinition, omit, noop } = require('../lib/utils')
 
+function emptyString () {
+  return ''
+}
+
 exports.install = function (Vue) {
   Globals.Vue = Vue
 }
@@ -76,7 +80,7 @@ function prefetchComponent (component, vm, queries) {
       key.charAt(0) !== '$' && (
         !options.query || (
           (typeof options.ssr === 'undefined' || options.ssr) &&
-          (typeof options.prefetch !== 'undefined' && options.prefetch)
+          options.prefetch !== false
         )
       )
     ) {
@@ -115,6 +119,7 @@ function createFakeInstance (options, data, parent, children, context) {
 
   // Render and other helpers
   VM_HELPERS.forEach(helper => vm[helper] = noop)
+  SSR_HELPERS.forEach(helper => vm[helper] = emptyString)
 
   // Scoped slots
   if (data.scopedSlots) {