fix: dont use object.assign/spread

so we dont need a polyfill

src/browser.js

@@ -1,6 +1,6 @@
 import { version } from '../package.json'
 import createMixin from './shared/mixin'
-import setOptions from './shared/options'
+import { setOptions } from './shared/options'
 import { isUndefined } from './utils/is-type'
 import $meta from './client/$meta'
 import { hasMetaInfo } from './shared/meta-helpers'

src/client/$meta.js

@@ -1,3 +1,4 @@
+import { getOptions } from '../shared/options'
 import { pause, resume } from '../shared/pausing'
 import refresh from './refresh'
 
@@ -12,7 +13,7 @@ export default function _$meta(options = {}) {
    */
   return function $meta() {
     return {
-      getOptions: () => Object.freeze({ ...options }),
+      getOptions: () => getOptions(options),
       refresh: _refresh.bind(this),
       inject,
       pause: pause.bind(this),

src/index.js

@@ -1,6 +1,6 @@
 import { version } from '../package.json'
 import createMixin from './shared/mixin'
-import setOptions from './shared/options'
+import { setOptions } from './shared/options'
 import $meta from './server/$meta'
 import { hasMetaInfo } from './shared/meta-helpers'
 

src/server/$meta.js

@@ -1,5 +1,6 @@
-import refresh from '../client/refresh'
+import { getOptions } from '../shared/options'
 import { pause, resume } from '../shared/pausing'
+import refresh from '../client/refresh'
 import inject from './inject'
 
 export default function _$meta(options = {}) {
@@ -13,7 +14,7 @@ export default function _$meta(options = {}) {
    */
   return function $meta() {
     return {
-      getOptions: () => Object.freeze({ ...options }),
+      getOptions: () => getOptions(options),
       refresh: _refresh.bind(this),
       inject: _inject.bind(this),
       pause: pause.bind(this),

src/shared/getComponentOption.js

@@ -1,4 +1,5 @@
 import { isFunction, isObject } from '../utils/is-type'
+import { findIndex } from '../utils/array'
 import { merge } from './merge'
 import { applyTemplate } from './template'
 import { inMetaInfoBranch } from './meta-helpers'
@@ -17,8 +18,8 @@ import { inMetaInfoBranch } from './meta-helpers'
  * @param  {Object} [result={}] - result so far
  * @return {Object} result - final aggregated result
  */
-export default function getComponentOption(options = {}, result = {}) {
-  const { component, keyName, metaTemplateKeyName, tagIDKeyName } = options
+export default function getComponentOption(options = {}, component, result = {}) {
+  const { keyName, metaTemplateKeyName, tagIDKeyName } = options
   const { $options, $children } = component
 
   if (component._inactive) {
@@ -52,10 +53,7 @@ export default function getComponentOption(options = {}, result = {}) {
         return
       }
 
-      result = getComponentOption({
-        ...options,
-        component: childComponent
-      }, result)
+      result = getComponentOption(options, childComponent, result)
     })
   }
 
@@ -69,7 +67,7 @@ export default function getComponentOption(options = {}, result = {}) {
         // keep meta item if it doesnt has a vmid
         !metaItem.hasOwnProperty(tagIDKeyName) ||
         // or if it's the first item in the array with this vmid
-        index === arr.findIndex(item => item[tagIDKeyName] === metaItem[tagIDKeyName])
+        index === findIndex(arr, item => item[tagIDKeyName] === metaItem[tagIDKeyName])
       )
     })
   }

src/shared/options.js

@@ -1,7 +1,7 @@
 import { isObject } from '../utils/is-type'
 import { defaultOptions } from './constants'
 
-export default function setOptions(options) {
+export function setOptions(options) {
   // combine options
   options = isObject(options) ? options : {}
 
@@ -13,3 +13,11 @@ export default function setOptions(options) {
 
   return options
 }
+
+export function getOptions(options) {
+  const optionsCopy = {}
+  for (const key in options) {
+    optionsCopy[key] = options[key]
+  }
+  return optionsCopy
+}

test/unit/getComponentOptions.test.js

@@ -9,13 +9,13 @@ describe('getComponentOption', () => {
 
   test('returns an empty object when no matching options are found', () => {
     const component = new Vue()
-    const mergedOption = getComponentOption({ component, keyName: 'noop' })
+    const mergedOption = getComponentOption({ keyName: 'noop' }, component)
     expect(mergedOption).toEqual({})
   })
 
   test('fetches the given option from the given component', () => {
     const component = new Vue({ someOption: { foo: 'bar' } })
-    const mergedOption = getComponentOption({ component, keyName: 'someOption' })
+    const mergedOption = getComponentOption({ keyName: 'someOption' }, component)
     expect(mergedOption.foo).toBeDefined()
     expect(mergedOption.foo).toEqual('bar')
   })
@@ -27,7 +27,7 @@ describe('getComponentOption', () => {
         return { opt: this.$options.name }
       }
     })
-    const mergedOption = getComponentOption({ component, keyName: 'someFunc' })
+    const mergedOption = getComponentOption({ keyName: 'someFunc' }, component)
     // TODO: Should this be foobar or Foobar
     expect(mergedOption.opt).toBeDefined()
     expect(mergedOption.opt).toEqual('Foobar')
@@ -44,7 +44,7 @@ describe('getComponentOption', () => {
 
     const wrapper = mount(component, { localVue })
 
-    const mergedOption = getComponentOption({ component: wrapper.vm, keyName: 'foo' })
+    const mergedOption = getComponentOption({ keyName: 'foo' }, wrapper.vm)
     expect(mergedOption).toEqual({ bar: 'baz', fizz: 'buzz' })
   })
 
@@ -111,7 +111,7 @@ describe('getComponentOption', () => {
 
     const wrapper = mount(component, { localVue })
 
-    const mergedOption = getComponentOption({ component: wrapper.vm, keyName: 'foo' })
+    const mergedOption = getComponentOption({ keyName: 'foo' }, wrapper.vm)
 
     expect(mergedOption).toEqual({ bar: 'baz' })
     expect(wrapper.vm.$children[0]._vueMeta).toBe(true)