fix:when using object syntax in v-bind, special attribute have no effect

Author: gebilaoxiong

flow/vnode.js

@@ -35,6 +35,7 @@ declare interface VNodeData {
   key?: string | number;
   slot?: string;
   ref?: string;
+  is?: string;
   pre?: boolean;
   tag?: string;
   staticClass?: string;

src/core/instance/render-helpers/bind-object-props.js

@@ -1,7 +1,13 @@
 /* @flow */
 
 import config from 'core/config'
-import { isObject, warn, toObject } from 'core/util/index'
+
+import {
+  warn,
+  isObject,
+  toObject,
+  isReservedAttribute
+} from 'core/util/index'
 
 /**
  * Runtime helper for merging v-bind="object" into a VNode's data.
@@ -24,7 +30,11 @@ export function bindObjectProps (
       }
       let hash
       for (const key in value) {
-        if (key === 'class' || key === 'style') {
+        if (
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
+        ) {
           hash = data
         } else {
           const type = data.attrs && data.attrs.type

src/core/instance/state.js

@@ -20,7 +20,8 @@ import {
   isReserved,
   handleError,
   validateProp,
-  isPlainObject
+  isPlainObject,
+  isReservedAttribute
 } from '../util/index'
 
 const sharedPropertyDefinition = {
@@ -54,12 +55,6 @@ export function initState (vm: Component) {
   if (opts.watch) initWatch(vm, opts.watch)
 }
 
-const isReservedProp = {
-  key: 1,
-  ref: 1,
-  slot: 1
-}
-
 function checkOptionType (vm: Component, name: string) {
   const option = vm.$options[name]
   if (!isPlainObject(option)) {
@@ -84,7 +79,7 @@ function initProps (vm: Component, propsOptions: Object) {
     const value = validateProp(key, propsOptions, propsData, vm)
     /* istanbul ignore else */
     if (process.env.NODE_ENV !== 'production') {
-      if (isReservedProp[key] || config.isReservedAttr(key)) {
+      if (isReservedAttribute(key) || config.isReservedAttr(key)) {
         warn(
           `"${key}" is a reserved attribute and cannot be used as component prop.`,
           vm

src/core/vdom/create-element.js

@@ -57,6 +57,10 @@ export function _createElement (
     )
     return createEmptyVNode()
   }
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is
+  }
   if (!tag) {
     // in case of component :is set to falsy value
     return createEmptyVNode()

src/shared/util.js

@@ -90,6 +90,11 @@ export function makeMap (
  */
 export const isBuiltInTag = makeMap('slot,component', true)
 
+/**
+ * Check if a attribute is a reserved attribute.
+ */
+export const isReservedAttribute = makeMap('key,ref,slot,is')
+
 /**
  * Remove an item from an array
  */