refactor: make hasMetaInfo default export

src/browser.js

@@ -3,7 +3,7 @@ import createMixin from './shared/mixin'
 import setOptions from './shared/options'
 import { isUndefined } from './shared/typeof'
 import $meta from './client/$meta'
-import { hasMetaInfo } from './shared/hasMetaInfo'
+import hasMetaInfo from './shared/hasMetaInfo'
 
 /**
  * Plugin install function.

src/index.js

@@ -2,7 +2,7 @@ import { version } from '../package.json'
 import createMixin from './shared/mixin'
 import setOptions from './shared/options'
 import $meta from './server/$meta'
-import { hasMetaInfo } from './shared/hasMetaInfo'
+import hasMetaInfo from './shared/hasMetaInfo'
 
 /**
  * Plugin install function.

src/shared/hasMetaInfo.js

@@ -1,3 +1,6 @@
-export function hasMetaInfo(vm = this) {
-  return vm && !!vm._vueMeta
+import { isObject } from './typeof'
+
+// Vue $root instance has a _vueMeta object property, otherwise its a boolean true
+export default function hasMetaInfo(vm = this) {
+  return vm && (vm._vueMeta === true || isObject(vm._vueMeta))
 }