Merge branch 'dev' into alpha

# Conflicts:
#	packages/uni-h5/dist/index.umd.min.js

packages/uni-app-plus/dist/index.v3.js

@@ -4037,7 +4037,6 @@ var serviceContext = (function () {
   var onBluetoothAdapterStateChange;
   var onBluetoothDeviceFound;
   var onBLEConnectionStateChange;
-  var onBLEConnectionStateChanged;
   var onBLECharacteristicValueChange;
 
   function openBluetoothAdapter (data, callbackId) {
@@ -4072,7 +4071,6 @@ var serviceContext = (function () {
 
   function createBLEConnection (data, callbackId) {
     onBLEConnectionStateChange = onBLEConnectionStateChange || bluetoothOn('onBLEConnectionStateChange');
-    onBLEConnectionStateChanged = onBLEConnectionStateChanged || bluetoothOn('onBLEConnectionStateChanged');
     bluetoothExec('createBLEConnection', callbackId, data);
   }
 
@@ -5925,7 +5923,8 @@ var serviceContext = (function () {
     const camera = plus.camera.getCamera();
     camera.captureImage(e => invokeChooseImage(callbackId, 'ok', sizeType, [e]),
       e => invokeChooseImage(callbackId, 'fail', 1), {
-        filename: TEMP_PATH + '/camera/'
+        filename: TEMP_PATH + '/camera/',
+        resolution: 'high'
       });
   };
   const openAlbum = function (callbackId, sizeType, count) {
@@ -13016,6 +13015,17 @@ var serviceContext = (function () {
     };
   }
 
+  /**
+   * mpvue event
+   */
+  function wrapperMPEvent (event) {
+    event.mp = Object.assign({
+      '@warning': 'mp is deprecated'
+    }, event);
+    event._processed = true;
+    return event
+  }
+
   const isAndroid = plus.os.name.toLowerCase() === 'android';
   const FOCUS_TIMEOUT = isAndroid ? 300 : 700;
   const HIDE_TIMEOUT = isAndroid ? 800 : 300;
@@ -13105,10 +13115,7 @@ var serviceContext = (function () {
     parseTargets(event);
     event.preventDefault = noop;
     event.stopPropagation = noop;
-    event.mp = event;
-    return Object.assign({
-      mp: event // mpvue
-    }, event)
+    return wrapperMPEvent(event)
   }
 
   const handleVdData = {

packages/uni-cli-shared/lib/platform.js

@@ -92,7 +92,7 @@ module.exports = {
     return uniPluginOptions.vue || '@dcloudio/vue-cli-plugin-uni/packages/mp-vue'
   },
   getPlatformCssVars () {
-    return uniPluginOptions.cssVars
+    return uniPluginOptions.cssVars || {}
   },
   getPlatformCssnano () {
     return {
@@ -134,4 +134,4 @@ module.exports = {
       ]
     }
   }
-}
+}

packages/vue-cli-plugin-uni/lib/app-plus/index.js

@@ -236,6 +236,14 @@ const v3 = {
     }
 
     if (isAppView) {
+      if (process.env.UNI_USING_V3_SCOPED) {
+        webpackConfig.module
+          .rule('vue')
+          .use('uniapp-app-style-scoped')
+          .loader(path.resolve(__dirname,
+            '../../packages/webpack-uni-app-loader/view/style'))
+      }
+
       if (process.env.NODE_ENV === 'production') {
         require('../h5/cssnano-options')(webpackConfig)
       }

packages/vue-cli-plugin-uni/lib/env.js

@@ -26,6 +26,8 @@ global.uniPlugin.validate.forEach(validate => {
 
 process.UNI_MANIFEST = manifestJsonObj
 
+process.env.UNI_USING_V3_SCOPED = true
+
 process.UNI_CLOUD = false
 process.UNI_CLOUD_TCB = false
 process.UNI_CLOUD_ALIYUN = false
@@ -408,6 +410,10 @@ global.uniPlugin.configureEnv.forEach(configureEnv => {
   configureEnv()
 })
 
+if (process.env.UNI_PLATFORM.startsWith('mp-')) {
+  console.log('小程序各家浏览器内核及自定义组件实现机制存在差异，可能存在样式布局兼容问题，参考：https://uniapp.dcloud.io/matter?id=mp')
+}
+
 runByHBuilderX && console.log('正在编译中...')
 
 module.exports = {

packages/vue-cli-plugin-uni/packages/@vue/component-compiler-utils/dist/parse.js

@@ -7,11 +7,12 @@ const splitRE = /\r?\n/g;
 const emptyRE = /^(?:\/\/)?\s*$/;
 function parse(options) {
     const { source, filename = '', compiler, compilerParseOptions = { pad: 'line' }, sourceRoot = '', needMap = true } = options;
-    const cacheKey = hash(filename + source);
+    // fixed by xxxxxx (添加isAppNVue标记，防止nvue与vue引用相同组件时，走了相同的cache)
+    const cacheKey = hash(String(options.isAppNVue) + filename + source);
     let output = cache.get(cacheKey);
     if (output)
         return output;
-    // fixed by xxxxxx    
+    // fixed by xxxxxx
     output = require('./parseCustomBlocks')(compiler.parseComponent(source, compilerParseOptions), options);
     if (needMap) {
         if (output.script && !output.script.src) {

packages/vue-cli-plugin-uni/packages/webpack-uni-app-loader/view/style.js

+const path = require('path')
+const loaderUtils = require('loader-utils')
+
+const isWin = /^win/.test(process.platform)
+const normalizePath = path => (isWin ? path.replace(/\\/g, '/') : path)
+
+const AppPath = normalizePath(path.resolve(process.env.UNI_INPUT_DIR, 'App.vue'))
+module.exports = function(content) {
+  this.cacheable && this.cacheable()
+
+  if (this.resourceQuery) {
+    const params = loaderUtils.parseQuery(this.resourceQuery)
+    if (params.mpType === 'page') {
+      return content
+    }
+  }
+  if (normalizePath(this.resourcePath) === AppPath) {
+    return content
+  }
+  if (content.indexOf('platform="mp-weixin"') !== -1) {
+    return content
+  }
+  return content.replace(/(<style\b[^><]*)>/ig, '$1 scoped>')
+}

packages/webpack-uni-pages-loader/lib/platforms/app-plus/define-pages.js

@@ -3,7 +3,7 @@ function generatePageCode (pages, pageOptions) {
     if (pageOptions[pagePath].nvue) {
       return ''
     }
-    return `__definePage('${pagePath}',function(){return Vue.extend(require('${pagePath}.vue').default)})`
+    return `__definePage('${pagePath}',function(){return Vue.extend(require('${pagePath}.vue?mpType=page').default)})`
   }).join('\n')
 }
 

src/core/helpers/patch.js

@@ -6,10 +6,11 @@ import {
  * mpvue event
  */
 export function wrapperMPEvent (event) {
-  return Object.assign({
-    mp: event,
-    _processed: true
+  event.mp = Object.assign({
+    '@warning': 'mp is deprecated'
   }, event)
+  event._processed = true
+  return event
 }
 /**
  * app-plus titleNView
@@ -48,4 +49,4 @@ export function mergeTitleNView (navigationBar, titleNView) {
     }
   }
   return navigationBar
-}
+}

src/core/view/components/canvas/index.vue

 <template>
-  <uni-canvas
-    :canvas-id="canvasId"
-    :disable-scroll="disableScroll"
-    v-on="_listeners"
+  <uni-canvas
+    :canvas-id="canvasId"
+    :disable-scroll="disableScroll"
+    v-on="_listeners"
   >
-    <canvas
-      ref="canvas"
-      width="300"
-      height="150"
+    <canvas
+      ref="canvas"
+      width="300"
+      height="150"
     />
     <div style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; overflow: hidden;">
       <slot />
     </div>
-    <v-uni-resize-sensor
-      ref="sensor"
-      @resize="_resize"
+    <v-uni-resize-sensor
+      ref="sensor"
+      @resize="_resize"
     />
   </uni-canvas>
 </template>
@@ -279,37 +279,37 @@ export default {
       }
     },
     preloadImage: function (actions) {
-      var sefl = this
+      var self = this
       actions.forEach(function (action) {
         var method = action.method
         var data = action.data
         var src = ''
         if (method === 'drawImage') {
           src = data[0]
-          src = sefl.$getRealPath(src)
+          src = self.$getRealPath(src)
           data[0] = src
         } else if (method === 'setFillStyle' && data[0] === 'pattern') {
           src = data[1]
-          src = sefl.$getRealPath(src)
+          src = self.$getRealPath(src)
           data[1] = src
         }
-        if (src && !sefl._images[src]) {
+        if (src && !self._images[src]) {
           loadImage()
         }
         /**
          * 加载图像
          */
         function loadImage () {
-          sefl._images[src] = new Image()
-          sefl._images[src].onload = function () {
-            sefl._images[src].ready = true
+          self._images[src] = new Image()
+          self._images[src].onload = function () {
+            self._images[src].ready = true
           }
           /**
            * 从Blob加载
            * @param {Blob} blob
            */
           function loadBlob (blob) {
-            sefl._images[src].src = (window.URL || window.webkitURL).createObjectURL(blob)
+            self._images[src].src = (window.URL || window.webkitURL).createObjectURL(blob)
           }
           /**
            * 从本地文件加载
@@ -318,7 +318,7 @@ export default {
           function loadFile (path) {
             var bitmap = new plus.nativeObj.Bitmap('bitmap' + Date.now())
             bitmap.load(path, function () {
-              sefl._images[src].src = bitmap.toBase64Data()
+              self._images[src].src = bitmap.toBase64Data()
               bitmap.clear()
             }, function () {
               bitmap.clear()
@@ -337,7 +337,7 @@ export default {
                 if (status === 200) {
                   loadFile(d.filename)
                 } else {
-                  sefl._images[src].src = src
+                  self._images[src].src = src
                 }
               }).start()
             }
@@ -350,20 +350,20 @@ export default {
               }
             }
             xhr.onerror = window.plus ? plusDownload : function () {
-              sefl._images[src].src = src
+              self._images[src].src = src
             }
             xhr.send()
           }
 
           if (window.plus && (!window.webkit || !window.webkit.messageHandlers)) {
-            sefl._images[src].src = src
+            self._images[src].src = src
           } else {
             // 解决 PLUS-APP（wkwebview）以及 H5 图像跨域问题（H5图像响应头需包含access-control-allow-origin）
             if (window.plus && src.indexOf('http://') !== 0 && src.indexOf('https://') !==
               0) {
               loadFile(src)
             } else if (/^data:.*,.*/.test(src)) {
-              sefl._images[src].src = src
+              self._images[src].src = src
             } else {
               loadUrl(src)
             }
@@ -449,7 +449,7 @@ export default {
         }, this.$page.id)
         return
       }
-      if (!callbackId) {
+      if (!callbackId) {
         // fix [...]展开TypedArray在低版本手机报错的问题，使用Array.prototype.slice
         return {
           data: Array.prototype.slice.call(imgData.data),

src/core/view/components/editor/formats/image.js

 export default function (Quill) {
   const Image = Quill.import('formats/image')
+  const ATTRIBUTES = [
+    'alt',
+    'height',
+    'width',
+    'data-custom',
+    'class',
+    'data-local'
+  ]
   Image.sanitize = url => url
+  Image.formats = function formats (domNode) {
+    return ATTRIBUTES.reduce(function (formats, attribute) {
+      if (domNode.hasAttribute(attribute)) {
+        formats[attribute] = domNode.getAttribute(attribute)
+      }
+      return formats
+    }, {})
+  }
+  const format = Image.prototype.format
+  Image.prototype.format = function (name, value) {
+    if (ATTRIBUTES.indexOf(name) > -1) {
+      if (value) {
+        this.domNode.setAttribute(name, value)
+      } else {
+        this.domNode.removeAttribute(name)
+      }
+    } else {
+      format.call(this, name, value)
+    }
+  }
 }

src/core/view/components/editor/index.vue

@@ -142,9 +142,15 @@ export default {
           case 'insertImage':
             {
               range = quill.getSelection(true)
-              const { src = '', alt = '', data = {} } = options
-              quill.insertEmbed(range.index, 'image', this.$getRealPath(src), Quill.sources.USER)
+              const { src = '', alt = '', width = '', height = '', extClass = '', data = {} } = options
+              const path = this.$getRealPath(src)
+              quill.insertEmbed(range.index, 'image', path, Quill.sources.USER)
+              const local = /^(file|blob):/.test(path) ? path : false
+              quill.formatText(range.index, 1, 'data-local', local)
               quill.formatText(range.index, 1, 'alt', alt)
+              quill.formatText(range.index, 1, 'width', width)
+              quill.formatText(range.index, 1, 'height', height)
+              quill.formatText(range.index, 1, 'class', extClass)
               quill.formatText(range.index, 1, 'data-custom', Object.keys(data).map(key => `${key}=${data[key]}`).join('&'))
               quill.setSelection(range.index + 1, Quill.sources.SILENT)
             }

src/core/view/components/image/index.vue

@@ -2,13 +2,13 @@
   <uni-image v-on="$listeners">
     <div
       ref="content"
-      :style="modeStyle"
+      :style="modeStyle"
     />
     <img :src="realImagePath">
     <v-uni-resize-sensor
       v-if="mode === 'widthFix'"
       ref="sensor"
-      @resize="_resize"
+      @resize="_resize"
     />
   </uni-image>
 </template>
@@ -34,8 +34,7 @@ export default {
     return {
       originalWidth: 0,
       originalHeight: 0,
-      availHeight: '',
-      sizeFixed: false
+      availHeight: ''
     }
   },
   computed: {
@@ -43,7 +42,7 @@ export default {
       return this.originalWidth && this.originalHeight ? this.originalWidth / this.originalHeight : 0
     },
     realImagePath () {
-      return this.src && this.$getRealPath(this.src)
+      return this.$getRealPath(this.src)
     },
     modeStyle () {
       let size = 'auto'
@@ -106,7 +105,6 @@ export default {
     mode (newValue, oldValue) {
       if (oldValue === 'widthFix') {
         this.$el.style.height = this.availHeight
-        this.sizeFixed = false
       }
       if (newValue === 'widthFix' && this.ratio) {
         this._fixSize()
@@ -123,7 +121,7 @@ export default {
   },
   methods: {
     _resize () {
-      if (this.mode === 'widthFix' && !this.sizeFixed) {
+      if (this.mode === 'widthFix') {
         this._fixSize()
       }
     },
@@ -136,7 +134,6 @@ export default {
           height = Math.round(height / 2) * 2
         }
         this.$el.style.height = height + 'px'
-        this.sizeFixed = true
       }
     },
     _setContentImage () {

src/core/view/components/input/index.vue

 <template>
-  <uni-input
-    @change.stop
+  <uni-input
+    @change.stop
     v-on="$listeners"
   >
-    <div
-      ref="wrapper"
+    <div
+      ref="wrapper"
       class="uni-input-wrapper"
     >
       <div
@@ -97,7 +97,7 @@ export default {
   },
   data () {
     return {
-      inputValue: this.value + '',
+      inputValue: this._getValueString(this.value),
       composing: false,
       wrapperHeight: 0,
       cachedValue: ''
@@ -133,7 +133,7 @@ export default {
       value && this._focusInput()
     },
     value (value) {
-      this.inputValue = value + ''
+      this.inputValue = this._getValueString(value)
     },
     inputValue (value) {
       this.$emit('update:value', value)
@@ -255,6 +255,9 @@ export default {
         value: this.inputValue,
         key: this.name
       } : {}
+    },
+    _getValueString (value) {
+      return value === null ? '' : String(value)
     }
   }
 }
@@ -295,7 +298,7 @@ uni-input[hidden] {
 }
 
 .uni-input-placeholder,
-.uni-input-input{
+.uni-input-input {
   width: 100%;
 }
 

src/core/view/components/movable-area/index.vue

 <script>
 import {
-  disableScrollBounce
+  disableScrollBounce,
+  deepClone
 } from 'uni-shared'
 
 function calc (e) {
@@ -56,9 +57,9 @@ export default {
       }
       return get(target)
     },
-    _touchstart (t) {
-      disableScrollBounce({
-        disable: true
+    _touchstart (t) {
+      disableScrollBounce({
+        disable: true
       })
       var i = t.touches
       if (i) {
@@ -94,9 +95,9 @@ export default {
         }
       }
     },
-    _touchend (e) {
-      disableScrollBounce({
-        disable: false
+    _touchend (e) {
+      disableScrollBounce({
+        disable: false
       })
       var t = e.touches
       if (!(t && t.length)) {
@@ -142,8 +143,9 @@ export default {
   },
   render (createElement) {
     var items = []
-    if (this.$slots.default) {
-      this.$slots.default.forEach(vnode => {
+    const $slots = this.$slots.default && deepClone(this.$slots.default, createElement)
+    if ($slots) {
+      $slots.forEach(vnode => {
         if (vnode.componentOptions && vnode.componentOptions.tag === 'v-uni-movable-view') {
           items.push(vnode)
         }
@@ -163,7 +165,7 @@ export default {
       on: {
         resize: this._resize
       }
-    }), this.$slots.default])
+    }), $slots])
   }
 }
 </script>
@@ -178,4 +180,4 @@ export default {
   uni-movable-area[hidden] {
     display: none;
   }
-</style>
+</style>

src/core/view/components/picker-view/index.vue

 <script>
+import { deepClone } from 'uni-shared'
+
 export default {
   name: 'PickerView',
   props: {
@@ -93,7 +95,7 @@ export default {
   render (createElement) {
     var items = []
     if (this.$slots.default) {
-      this.$slots.default.forEach(vnode => {
+      deepClone(this.$slots.default, createElement).forEach(vnode => {
         if (vnode.componentOptions && vnode.componentOptions.tag === 'v-uni-picker-view-column') {
           items.push(vnode)
         }

src/core/view/components/swiper/index.vue

 
 <script>
 import touchtrack from 'uni-mixins/touchtrack'
-
-function deepClone (vnodes, createElement) {
-  function cloneVNode (vnode) {
-    var clonedChildren = vnode.children && vnode.children.map(cloneVNode)
-    var cloned = createElement(vnode.tag, vnode.data, clonedChildren)
-    cloned.text = vnode.text
-    cloned.isComment = vnode.isComment
-    cloned.componentOptions = vnode.componentOptions
-    cloned.elm = vnode.elm
-    cloned.context = vnode.context
-    cloned.ns = vnode.ns
-    cloned.isStatic = vnode.isStatic
-    cloned.key = vnode.key
-    return cloned
-  }
-
-  return vnodes.map(cloneVNode)
-}
+import { deepClone } from 'uni-shared'
 
 export default {
   name: 'Swiper',

src/core/view/components/textarea/index.vue

@@ -119,7 +119,7 @@ export default {
   },
   data () {
     return {
-      valueSync: String(this.value),
+      valueSync: this._getValueString(this.value),
       valueComposition: '',
       composition: false,
       focusSync: this.focus,
@@ -152,7 +152,7 @@ export default {
   },
   watch: {
     value (val) {
-      this.valueSync = String(val)
+      this.valueSync = this._getValueString(val)
     },
     valueSync (val) {
       if (val !== this._oldValue) {
@@ -296,6 +296,9 @@ export default {
     },
     _resetFormData () {
       this.valueSync = ''
+    },
+    _getValueString (value) {
+      return value === null ? '' : String(value)
     }
   }
 }

src/core/view/mixins/base.js

@@ -6,10 +6,10 @@ import {
 export default {
   methods: {
     $getRealPath (src) {
-      return getRealPath(src)
+      return src ? getRealPath(src) : src
     },
     $trigger (name, $event, detail) {
       this.$emit(name, processEvent.call(this, name, $event, detail, this.$el, this.$el))
     }
   }
-}
+}

src/core/view/mixins/keyboard.js

@@ -107,6 +107,10 @@ export default {
       UniViewJSBridge.unsubscribe('hideKeyboard', this.hideKeyboardTemp)
       document.removeEventListener('click', iosHideKeyboard, false)
       this.resetSoftinputNavBar()
+      // 修复ios端显示与点击位置错位的Bug by:wyq
+      if (document.body.scrollIntoView) {
+        document.body.scrollIntoView()
+      }
     }
   }
 }

src/platforms/app-plus/service/api/media/choose-image.js

@@ -97,7 +97,8 @@ const openCamera = function (callbackId, sizeType) {
   const camera = plus.camera.getCamera()
   camera.captureImage(e => invokeChooseImage(callbackId, 'ok', sizeType, [e]),
     e => invokeChooseImage(callbackId, 'fail', 1), {
-      filename: TEMP_PATH + '/camera/'
+      filename: TEMP_PATH + '/camera/',
+      resolution: 'high'
     })
 }
 const openAlbum = function (callbackId, sizeType, count) {

src/platforms/app-plus/service/api/ui/popup.js

@@ -168,7 +168,7 @@ export function showActionSheet ({
   }
 
   if (plus.os.name === 'iOS') {
-    options.cancel = '取消'
+    options.cancel = ''
   }
 
   plus.nativeUI.actionSheet(Object.assign(options, { popover }), (e) => {

src/platforms/app-plus/service/framework/plugins/vdom-sync.js

@@ -3,6 +3,10 @@ import {
   noop
 } from 'uni-shared'
 
+import {
+  wrapperMPEvent
+} from 'uni-helpers/patch'
+
 import {
   VD_SYNC,
   UI_EVENT,
@@ -55,10 +59,7 @@ function wrapperEvent (event) {
   parseTargets(event)
   event.preventDefault = noop
   event.stopPropagation = noop
-  event.mp = event
-  return Object.assign({
-    mp: event // mpvue
-  }, event)
+  return wrapperMPEvent(event)
 }
 
 const handleVdData = {

src/platforms/app-plus/view/components/map/index.vue

@@ -166,7 +166,7 @@ export default {
       this.map && this.map[val ? 'hide' : 'show']()
     },
     scale (val) {
-      this.map && this.map.setZoom(val)
+      this.map && this.map.setZoom(parseInt(val))
     },
     latitude (val) {
       this.map && this.map.setStyles({
@@ -197,7 +197,7 @@ export default {
     map.__markers__ = {}
     map.__lines__ = []
     map.__circles__ = []
-    map.setZoom(this.scale)
+    map.setZoom(parseInt(this.scale))
     plus.webview.currentWebview().append(map)
     if (this.hidden) {
       map.hide()
@@ -238,11 +238,12 @@ export default {
       })
     },
     getCenterLocation ({ callbackId }) {
-      const center = this.map.getCenter()
-      this._publishHandler(callbackId, {
-        longitude: center.longitude,
-        latitude: center.latitude,
-        errMsg: 'getCenterLocation:ok'
+      this.map.getCurrentCenter((state, point) => {
+        this._publishHandler(callbackId, {
+          longitude: point.longitude,
+          latitude: point.latitude,
+          errMsg: 'getCenterLocation:ok'
+        })
       })
     },
     getRegion ({ callbackId }) {
@@ -319,11 +320,18 @@ export default {
         nativeMap.__markers__[id + ''] = nativeMarker
       })
     },
+    _clearMarkers () {
+      const map = this.map
+      const data = map.__markers__
+      for (const key in data) {
+        map.removeOverlay(data[key])
+      }
+      map.__markers__ = {}
+    },
     _addMarkers (markers, clear) {
       if (this.map) {
         if (clear) {
-          this.map.clearOverlays()
-          this.map.__markers__ = {}
+          this._clearMarkers()
         }
         markers.forEach(marker => {
           this._addMarker(this.map, marker)

src/platforms/app-plus/view/framework/plugins/data.js

@@ -127,7 +127,7 @@ function getData (id, name) {
   try {
     return this.$r[id][name]
   } catch (e) {
-    console.error(this.$options.__file + `:[${this._$id}]$r[${id}][${name}] is undefined`)
+    // console.error(this.$options.__file + `:[${this._$id}]$r[${id}][${name}] is undefined`)
   }
 }
 /**
@@ -143,7 +143,7 @@ function getChangeData (id, name) {
     this.$set(this.wxsProps, wxsPropName, value)
     return value
   } catch (e) {
-    console.error(this.$options.__file + `:[${this._$id}]$r[${id}][${name}] is undefined`)
+    // console.error(this.$options.__file + `:[${this._$id}]$r[${id}][${name}] is undefined`)
   }
 }
 

src/platforms/h5/service/api/media/choose-image.js

@@ -55,7 +55,7 @@ export function chooseImage ({
     for (let i = 0; i < fileCount; i++) {
       const file = event.target.files[i]
       let filePath
-      Object.defineProperty(file, 'filePath', {
+      Object.defineProperty(file, 'path', {
         get () {
           filePath = filePath || fileToUrl(file)
           return filePath

src/shared/util.js

@@ -95,43 +95,61 @@ export function debounce (fn, delay) {
 
 export function kebabCase (string) {
   return string.replace(/[A-Z]/g, str => '-' + str.toLowerCase())
-}
-
-/**
- * Check if two values are loosely equal - that is,
- * if they are plain objects, do they have the same shape?
- */
-export function looseEqual (a, b) {
-  if (a === b) return true
-  const isObjectA = isObject(a)
-  const isObjectB = isObject(b)
-  if (isObjectA && isObjectB) {
-    try {
-      const isArrayA = Array.isArray(a)
-      const isArrayB = Array.isArray(b)
-      if (isArrayA && isArrayB) {
-        return a.length === b.length && a.every((e, i) => {
-          return looseEqual(e, b[i])
-        })
-      } else if (a instanceof Date && b instanceof Date) {
-        return a.getTime() === b.getTime()
-      } else if (!isArrayA && !isArrayB) {
-        const keysA = Object.keys(a)
-        const keysB = Object.keys(b)
-        return keysA.length === keysB.length && keysA.every(key => {
-          return looseEqual(a[key], b[key])
-        })
-      } else {
-        /* istanbul ignore next */
-        return false
-      }
-    } catch (e) {
-      /* istanbul ignore next */
-      return false
-    }
-  } else if (!isObjectA && !isObjectB) {
-    return String(a) === String(b)
-  } else {
-    return false
-  }
-}
+}
+
+/**
+ * Check if two values are loosely equal - that is,
+ * if they are plain objects, do they have the same shape?
+ */
+export function looseEqual (a, b) {
+  if (a === b) return true
+  const isObjectA = isObject(a)
+  const isObjectB = isObject(b)
+  if (isObjectA && isObjectB) {
+    try {
+      const isArrayA = Array.isArray(a)
+      const isArrayB = Array.isArray(b)
+      if (isArrayA && isArrayB) {
+        return a.length === b.length && a.every((e, i) => {
+          return looseEqual(e, b[i])
+        })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
+      } else if (!isArrayA && !isArrayB) {
+        const keysA = Object.keys(a)
+        const keysB = Object.keys(b)
+        return keysA.length === keysB.length && keysA.every(key => {
+          return looseEqual(a[key], b[key])
+        })
+      } else {
+        /* istanbul ignore next */
+        return false
+      }
+    } catch (e) {
+      /* istanbul ignore next */
+      return false
+    }
+  } else if (!isObjectA && !isObjectB) {
+    return String(a) === String(b)
+  } else {
+    return false
+  }
+}
+
+export function deepClone (vnodes, createElement) {
+  function cloneVNode (vnode) {
+    var clonedChildren = vnode.children && vnode.children.map(cloneVNode)
+    var cloned = createElement(vnode.tag, vnode.data, clonedChildren)
+    cloned.text = vnode.text
+    cloned.isComment = vnode.isComment
+    cloned.componentOptions = vnode.componentOptions
+    cloned.elm = vnode.elm
+    cloned.context = vnode.context
+    cloned.ns = vnode.ns
+    cloned.isStatic = vnode.isStatic
+    cloned.key = vnode.key
+    return cloned
+  }
+
+  return vnodes.map(cloneVNode)
+}